Browse generic OBD-II codes
A tighter generic OBD-II list view with code meaning, severity, and a short diagnosis cue on each row.
Every entry here is written as a generic cross-make guide. Manufacturer views are used where the diagnosis or repair path differs enough to justify make-specific notes.
Codes
467
High severity
69
Medium severity
348
Low severity
50
P0420
LowP0420 usually means the catalytic converter efficiency is below the threshold the ECU expects.
An upstream exhaust leak, engine misfire, or a tired catalytic converter is the first place to look.
P0300
HighP0300 usually means the engine is detecting random or multiple-cylinder misfires.
An ignition issue, intake leak, or fuel-delivery fault is usually the first place to look.
P0171
MediumP0171 usually means bank 1 is running too lean.
A vacuum leak, airflow sensor issue, or fuel-delivery problem is the first place to look.
P0174
MediumP0174 usually means bank 2 is running too lean.
A vacuum leak, airflow sensor issue, or fuel-delivery problem is the first place to look.
P0420
Powertrain
P0420 usually means the catalytic converter efficiency is below the threshold the ECU expects.
An upstream exhaust leak, engine misfire, or a tired catalytic converter is the first place to look.
P0300
Powertrain
P0300 usually means the engine is detecting random or multiple-cylinder misfires.
An ignition issue, intake leak, or fuel-delivery fault is usually the first place to look.
P0171
Powertrain
P0171 usually means bank 1 is running too lean.
A vacuum leak, airflow sensor issue, or fuel-delivery problem is the first place to look.
P0174
Powertrain
P0174 usually means bank 2 is running too lean.
A vacuum leak, airflow sensor issue, or fuel-delivery problem is the first place to look.
P0455
Powertrain
P0455 usually means the EVAP system has detected a large leak.
A loose fuel cap, disconnected EVAP hose, or purge/vent valve issue is the first place to look.
P0128
Powertrain
P0128 usually means the engine is not reaching the temperature the ECU expects in time.
A thermostat stuck open, low coolant, or a faulty temperature reading is the first place to look.
P0441
Powertrain
P0441 usually means the EVAP purge flow is not what the ECU expected.
A purge valve problem, EVAP hose issue, or fuel-cap sealing fault is the first place to look.
P0440
Powertrain
P0440 usually means the EVAP system has a general malfunction.
A cap sealing issue, hose leak, or purge/vent fault is the first place to look.
P0401
Powertrain
P0401 usually means the EGR system is not flowing enough exhaust gas when the ECU expects it to.
A blocked EGR passage, stuck valve, or vacuum/control issue is the first place to look.
P0402
Powertrain
P0402 means the engine computer is seeing more EGR flow than expected.
A stuck-open EGR valve, clogged control solenoid, or bad flow feedback is often the first place to look.
P0135
Powertrain
P0135 usually means the bank 1 sensor 1 oxygen sensor heater circuit is not behaving correctly.
A failed heater element, wiring problem, or fuse/feed issue is the first place to look.
P0133
Powertrain
P0133 usually means the bank 1 sensor 1 oxygen sensor is responding too slowly.
A tired upstream oxygen sensor, exhaust leak, or mixture problem is the first place to look.
P0141
Powertrain
P0141 means the bank 1 downstream oxygen sensor heater circuit is not working properly.
A failed downstream oxygen-sensor heater, blown fuse, or wiring fault is usually the first place to look.
P0113
Powertrain
P0113 usually means the intake air temperature signal is reading too high.
An open circuit, damaged connector, or failed sensor is usually the first place to look.
P0101
Powertrain
P0101 usually means the mass airflow signal is outside the expected range or performance window.
A dirty MAF sensor, air leak, or aftermarket intake issue is usually the first place to look.
P0102
Powertrain
P0102 usually means the mass airflow signal is reading too low.
A dirty sensor, poor connection, or restricted airflow path is usually the first place to look.
P0118
Powertrain
P0118 usually means the engine coolant temperature signal is reading too high.
An open circuit, failed sensor, or connector problem is usually the first place to look.
P0117
Powertrain
P0117 usually means the engine coolant temperature signal is reading too low.
A shorted sensor, wiring fault, or low coolant issue is usually the first place to look.
P0325
Powertrain
P0325 means the knock sensor circuit on bank 1 is not working properly.
A bad knock sensor, wiring fault, or sensor mounting issue is often the first place to look.
P0430
Powertrain
P0430 means the catalytic converter on bank 2 is not meeting efficiency expectations.
A tired bank 2 converter is possible, but exhaust leaks and upstream engine-running faults should be ruled out first.
P0301
Powertrain
P0301 means cylinder 1 is misfiring.
A bad spark plug, weak coil, injector problem, or cylinder 1 mechanical issue is usually the first place to look.
P0302
Powertrain
P0302 means cylinder 2 is misfiring.
A bad spark plug, weak coil, injector problem, or cylinder 2 mechanical issue is usually the first place to look.
P0303
Powertrain
P0303 means cylinder 3 is misfiring.
A bad spark plug, weak coil, injector problem, or cylinder 3 mechanical issue is usually the first place to look.
P0100
Powertrain
P0100 usually means the mass airflow sensor circuit is not behaving correctly.
A dirty or failed MAF sensor, loose connector, or intake leak is usually the first place to look.
P0103
Powertrain
P0103 usually means the mass airflow signal is reading too high.
A contaminated MAF sensor, open or damaged wiring, or an intake leak after the sensor is usually the first place to look.
P0104
Powertrain
P0104 usually means the mass airflow signal is intermittent or erratic.
A loose connector, chafed wiring, or a MAF sensor that fails only intermittently is usually the first place to look.
P0105
Powertrain
P0105 usually means the MAP sensor circuit has a malfunction.
A failed MAP sensor, disconnected vacuum source, or wiring fault is usually the first place to look.
P0106
Powertrain
P0106 usually means the MAP signal is outside the expected range or performance window.
A vacuum leak, biased MAP sensor, or intake issue is usually the first place to look.
P0107
Powertrain
P0107 usually means the MAP signal is reading too low.
A shorted circuit, sensor fault, or damaged vacuum path is usually the first place to look.
P0108
Powertrain
P0108 usually means the MAP signal is reading too high.
A disconnected hose, open circuit, or failed MAP sensor is usually the first place to look.
P0109
Powertrain
P0109 usually means the MAP signal is intermittent or erratic.
A loose connector, broken wire, or MAP sensor that fails only under certain conditions is usually the first place to look.
P0111
Powertrain
P0111 usually means the intake air temperature signal is out of the expected range.
A sensor bias, connector problem, or intake wiring issue is usually the first place to look.
P0112
Powertrain
P0112 usually means the intake air temperature signal is reading too low.
A shorted sensor, wiring fault, or bad connector is usually the first place to look.
P0114
Powertrain
P0114 usually means the intake air temperature signal is intermittent or erratic.
A loose connector, broken wire, or sensor that fails intermittently is usually the first place to look.
P0115
Powertrain
P0115 usually means the engine coolant temperature circuit has a malfunction.
A sensor fault, connector issue, or wiring problem is usually the first place to look, with coolant level as an important check alongside it.
P0116
Powertrain
P0116 usually means the engine coolant temperature signal is out of the expected range or performance window.
A thermostat problem, biased sensor, or wiring issue is usually the first place to look.
P0119
Powertrain
P0119 usually means the engine coolant temperature signal is intermittent.
A loose connector, wiring break, or failing coolant sensor is the first place to look.
P0120
Powertrain
P0120 usually means the throttle position sensor circuit is not behaving correctly.
A worn TPS, loose connector, or throttle-body wiring issue is usually the first place to look.
P0121
Powertrain
P0121 usually means the throttle-position signal is out of range or not matching what the ECU expects.
A throttle sensor fault, connector issue, or pedal/throttle signal mismatch is the first place to look.
P0122
Powertrain
P0122 usually means the throttle position sensor is reading too low.
A sensor fault, poor connector fit, or damaged signal wiring is usually the first place to look.
P0123
Powertrain
P0123 usually means the throttle-position signal is reading too high.
A sensor fault, wiring issue, or connector problem is the first place to look.
P0124
Powertrain
P0124 usually means the throttle-position signal is intermittent.
A loose connector, wiring break, or flaky sensor is the first place to look.
P0125
Powertrain
P0125 usually means the engine has not warmed enough for closed-loop operation.
A thermostat stuck open, low coolant, or a temperature-sensor issue is the first place to look.
P0126
Powertrain
P0126 usually means the engine is not staying warm enough for stable operation.
A thermostat issue, low coolant, or a sensor reading that does not match engine behavior is the first place to look.
P0130
Powertrain
P0130 usually means the bank 1 sensor 1 oxygen sensor circuit is not behaving correctly.
A failed upstream oxygen sensor, exhaust leak, or wiring issue is the first place to look.
P0131
Powertrain
P0131 usually means the bank 1 sensor 1 oxygen sensor is reading too low.
A vacuum leak, exhaust leak, or weak upstream O2 sensor is the first place to look.
P0132
Powertrain
P0132 usually means the bank 1 sensor 1 oxygen sensor is reading too high.
A rich-running condition, leaking injector, or biased sensor is the first place to look.
P0134
Powertrain
P0134 usually means the bank 1 sensor 1 oxygen sensor is not showing activity.
A failed sensor, wiring issue, or exhaust problem is the first place to look.
P0136
Powertrain
P0136 usually means the bank 1 sensor 2 oxygen sensor circuit is not behaving correctly.
A failed downstream O2 sensor, wiring issue, or exhaust leak near the sensor is the first place to look.
P0137
Powertrain
P0137 usually means the bank 1 sensor 2 oxygen sensor is reading too low.
A downstream exhaust leak, sensor bias, or wiring problem is the first place to look.
P0138
Powertrain
P0138 usually means the bank 1 sensor 2 oxygen sensor is reading too high.
A biased downstream sensor, wiring issue, or exhaust/catalyst condition is the first place to look.
P0139
Powertrain
P0139 usually means the bank 1 sensor 2 oxygen sensor is responding too slowly.
A tired downstream sensor, exhaust leak, or catalyst-related issue is the first place to look.
P0140
Powertrain
P0140 usually means the bank 1 sensor 2 oxygen sensor is not showing activity.
A failed downstream sensor, wiring issue, or exhaust leak near the sensor is the first place to look.
P0142
Powertrain
P0142 usually means the bank 1 sensor 3 oxygen sensor circuit is not behaving correctly.
A failed sensor, exhaust leak, or wiring issue is the first place to look.
P0143
Powertrain
P0143 usually means the bank 1 sensor 3 oxygen sensor is reading too low.
A lean-running issue, exhaust leak, or weak sensor signal is the first place to look.
P0144
Powertrain
P0144 usually means the bank 1 sensor 3 oxygen sensor is reading too high.
A rich-running condition, sensor bias, or wiring issue is the first place to look.
P0145
Powertrain
P0145 usually means the bank 1 sensor 3 oxygen sensor is responding too slowly.
A tired sensor, exhaust leak, or mixture problem is the first place to look.
P0146
Powertrain
P0146 usually means the bank 1 sensor 4 oxygen sensor circuit is not behaving correctly.
A failed sensor, exhaust leak, or wiring issue is the first place to look.
P0147
Powertrain
P0147 usually means the bank 1 sensor 3 oxygen sensor heater circuit is not behaving correctly.
A failed heater element, wiring problem, or fuse/feed issue is the first place to look.
P0150
Powertrain
P0150 usually means the bank 2 sensor 1 oxygen sensor circuit is not behaving correctly.
A failed sensor, exhaust leak, or wiring issue is the first place to look.
P0151
Powertrain
P0151 usually means the bank 2 sensor 1 oxygen sensor is reading too low.
A vacuum leak, exhaust leak, or weak upstream O2 sensor is the first place to look.
P0152
Powertrain
P0152 usually means the bank 2 sensor 1 oxygen sensor is reading too high.
A rich-running condition, leaking injector, or biased sensor is the first place to look.
P0153
Powertrain
P0153 usually means the bank 2 sensor 1 oxygen sensor is responding too slowly.
A tired upstream oxygen sensor, exhaust leak, or mixture problem is the first place to look.
P0154
Powertrain
P0154 usually means the bank 2 sensor 1 oxygen sensor is not showing activity.
A failed sensor, wiring issue, or exhaust problem is the first place to look.
P0155
Powertrain
P0155 usually means the bank 2 sensor 1 oxygen sensor heater circuit is not behaving correctly.
A failed heater element, wiring problem, or fuse/feed issue is the first place to look.
P0156
Powertrain
P0156 usually means the bank 2 sensor 2 oxygen sensor circuit is not behaving correctly.
A failed downstream O2 sensor, wiring issue, or exhaust leak near the sensor is the first place to look.
P0157
Powertrain
P0157 usually means the bank 2 sensor 2 oxygen sensor is reading too low.
A downstream exhaust leak, sensor bias, or wiring problem is the first place to look.
P0158
Powertrain
P0158 usually means the bank 2 sensor 2 oxygen sensor is reading too high.
A biased downstream sensor, wiring issue, or exhaust/catalyst condition is the first place to look.
P0159
Powertrain
P0159 usually means the bank 2 sensor 2 oxygen sensor is responding too slowly.
A tired downstream sensor, exhaust leak, or catalyst-related issue is the first place to look.
P0160
Powertrain
P0160 usually means the bank 2 sensor 2 oxygen sensor is not showing activity.
A failed sensor, wiring issue, or exhaust problem is the first place to look.
P0161
Powertrain
P0161 usually means the bank 2 sensor 2 oxygen sensor heater circuit is not behaving correctly.
A failed heater element, wiring problem, or fuse/feed issue is the first place to look.
P0162
Powertrain
P0162 usually means the bank 2 sensor 3 oxygen sensor circuit is not behaving correctly.
A failed sensor, exhaust leak, or wiring issue is the first place to look.
P0163
Powertrain
P0163 usually means the bank 2 sensor 3 oxygen sensor is reading too low.
A downstream exhaust leak, sensor bias, or wiring problem is the first place to look.
P0164
Powertrain
P0164 usually means the bank 2 sensor 3 oxygen sensor is reading too high.
A biased downstream sensor, wiring issue, or exhaust/catalyst condition is the first place to look.
P0165
Powertrain
P0165 usually means the bank 2 sensor 3 oxygen sensor is responding too slowly.
A tired sensor, exhaust leak, or mixture problem is the first place to look.
P0166
Powertrain
P0166 usually means the bank 2 sensor 3 oxygen sensor is not showing activity.
A failed sensor, wiring issue, or exhaust problem is the first place to look.
P0167
Powertrain
P0167 usually means the bank 2 sensor 3 oxygen sensor heater circuit is not behaving correctly.
A failed heater element, wiring problem, or fuse/feed issue is the first place to look.
P0170
Powertrain
P0170 usually means bank 1 fuel trim is outside the normal correction range.
A vacuum leak, airflow-meter problem, or fuel-delivery fault is usually the first place to look.
P0172
Powertrain
P0172 usually means bank 1 is running too rich.
A leaking injector, high fuel pressure, a dirty airflow sensor, or biased sensor data is the first place to look.
P0173
Powertrain
P0173 usually means the fuel trim on bank 2 is out of range.
A vacuum leak, fuel-pressure issue, injector fault, or air-metering problem is usually the first place to look.
P0176
Powertrain
P0176 usually means the fuel composition sensor circuit is not working properly.
A wiring fault, failed fuel composition sensor, or contaminated connector is usually the first place to look.
P0177
Powertrain
P0177 usually means the fuel composition sensor signal is out of range or performance.
A failing fuel composition sensor, wiring issue, or contaminated fuel is usually the first place to look.
P0178
Powertrain
P0178 usually means the fuel composition sensor signal is reading too low.
A wiring short, bad connector, or failed sensor is usually the first place to look.
P0179
Powertrain
P0179 usually means the fuel composition sensor signal is reading too high.
A wiring open, bad connector, or failed sensor is usually the first place to look.
P0180
Powertrain
P0180 usually means the fuel temperature sensor circuit has a malfunction.
A sensor wiring issue, poor connector, or failed fuel-temperature sensor is usually the first place to look.
P0181
Powertrain
P0181 usually means the fuel temperature sensor is out of range or performance.
A drifting fuel-temperature sensor, wiring issue, or unrealistic signal is usually the first place to look.
P0182
Powertrain
P0182 usually means the fuel temperature sensor is reading too low.
A shorted sensor, connector fault, or wiring issue is usually the first place to look.
P0183
Powertrain
P0183 usually means the fuel temperature sensor is reading too high.
A wiring open, bad connector, or sensor failure is usually the first place to look.
P0184
Powertrain
P0184 usually means the fuel temperature sensor is intermittent or erratic.
A loose connector, failing sensor, or damaged wiring is usually the first place to look.
P0185
Powertrain
P0185 usually means the fuel temperature sensor B circuit is not behaving correctly.
A sensor failure, wiring issue, or module signal problem is the first place to look.
P0186
Powertrain
P0186 usually means the fuel temperature sensor B is out of normal range or its performance looks wrong.
A biased sensor, wiring problem, or temperature reading that does not match the fuel system is the first place to look.
P0187
Powertrain
P0187 usually means the fuel temperature sensor B signal is reading too low.
An open circuit, short to ground, or bad sensor signal is the first place to look.
P0188
Powertrain
P0188 usually means the fuel temperature sensor B signal is reading too high.
A short to voltage, wiring fault, or failed sensor that reads hot is the first place to look.
P0189
Powertrain
P0189 usually means the fuel temperature sensor is intermittent or its signal is dropping out.
A loose connector, wiring break, or sensor issue is the first place to look.
P0190
Powertrain
P0190 means the fuel rail pressure sensor circuit is not behaving normally.
A bad fuel rail pressure sensor, wiring fault, or connector problem is usually the first place to look.
P0191
Powertrain
P0191 means the fuel rail pressure reading is outside the expected range or not responding properly.
A weak fuel pump, pressure control issue, or failing rail pressure sensor is usually the first place to look.
P0192
Powertrain
P0192 means the fuel rail pressure sensor signal is reading too low.
A short-to-ground, bad sensor, or real low fuel pressure is usually the first place to look.
P0193
Powertrain
P0193 means the fuel rail pressure sensor signal is reading too high.
A bad sensor, open circuit, or signal wiring problem is usually the first place to look.
P0194
Powertrain
P0194 means the fuel rail pressure sensor signal is intermittent or unstable.
A loose connector, harness fault, or failing sensor is usually the first place to look.
P0195
Powertrain
P0195 means the engine oil temperature sensor circuit is not working properly.
A bad oil temperature sensor, wiring fault, or connector issue is usually the first place to look.
P0196
Powertrain
P0196 means the engine oil temperature sensor is reading outside the expected range.
A bad oil temperature sensor, wiring issue, or an unrealistic reading is usually the first place to look.
P0197
Powertrain
P0197 means the engine oil temperature sensor is reading too low.
A shorted sensor, wiring fault, or contaminated connector is usually the first place to look.
P0198
Powertrain
P0198 means the engine oil temperature sensor is reading too high.
A bad sensor, open circuit, or connector problem is usually the first place to look.
P0199
Powertrain
P0199 means the engine oil temperature sensor signal is intermittent or unstable.
A loose connector, harness fault, or sensor that fails when hot is usually the first place to look.
P0200
Powertrain
P0200 usually means the injector circuit has a general malfunction.
A wiring, connector, fuse, or injector driver problem is usually the first place to look.
P0201
Powertrain
P0201 usually means the injector circuit has a malfunction on cylinder 1.
A wiring or connector fault at cylinder 1, or a failed cylinder 1 injector, is usually the first place to look.
P0202
Powertrain
P0202 usually means the injector circuit has a malfunction on cylinder 2.
A wiring or connector fault at cylinder 2, or a failed cylinder 2 injector, is usually the first place to look.
P0203
Powertrain
P0203 usually means the injector circuit has a malfunction on cylinder 3.
A wiring or connector fault at cylinder 3, or a failed cylinder 3 injector, is usually the first place to look.
P0204
Powertrain
P0204 usually means the injector circuit has a malfunction on cylinder 4.
A wiring or connector fault at cylinder 4, or a failed cylinder 4 injector, is usually the first place to look.
P0205
Powertrain
P0205 usually means the injector circuit has a malfunction on cylinder 5.
A wiring or connector fault at cylinder 5, or a failed cylinder 5 injector, is usually the first place to look.
P0206
Powertrain
P0206 usually means the injector circuit has a malfunction on cylinder 6.
A wiring or connector fault at cylinder 6, or a failed cylinder 6 injector, is usually the first place to look.
P0207
Powertrain
P0207 usually means the injector circuit has a malfunction on cylinder 7.
A wiring or connector fault at cylinder 7, or a failed cylinder 7 injector, is usually the first place to look.
P0208
Powertrain
P0208 usually means the injector circuit has a malfunction on cylinder 8.
A wiring or connector fault at cylinder 8, or a failed cylinder 8 injector, is usually the first place to look.
P0209
Powertrain
P0209 usually means the injector circuit has a malfunction on cylinder 9.
A wiring or connector fault at cylinder 9, or a failed cylinder 9 injector, is usually the first place to look.
P0210
Powertrain
P0210 usually means injector circuit malfunction for cylinder 10.
A wiring issue, connector problem, or failed injector is usually the first place to look.
P0211
Powertrain
P0211 usually means injector circuit malfunction for cylinder 11.
A connector issue, wiring fault, or failed injector is usually the first place to look.
P0212
Powertrain
P0212 usually means injector circuit malfunction for cylinder 12.
A connector problem, wiring fault, or failed injector is usually the first place to look.
P0213
Powertrain
P0213 usually means injector circuit malfunction for cylinder 13.
A wiring issue, connector problem, or failed injector is usually the first place to look.
P0214
Powertrain
P0214 usually means injector circuit malfunction for cylinder 14.
A connector issue, wiring fault, or failed injector is usually the first place to look.
P0215
Powertrain
P0215 usually means the engine shutoff solenoid or injector shutoff circuit is malfunctioning.
A wiring fault, connector issue, or failed shutoff solenoid is usually the first place to look.
P0216
Powertrain
P0216 usually means injector timing control malfunction or injection timing fault.
A timing-control fault, sensor issue, or fuel-control problem is usually the first place to look.
P0217
Powertrain
P0217 usually means engine overheating condition.
Low coolant, thermostat trouble, cooling fan issues, or a coolant leak is usually the first place to look.
P0218
Powertrain
P0218 usually means transmission over temperature condition.
Low fluid, a cooling issue, or heavy load/heat buildup is usually the first place to look.
P0219
Powertrain
P0219 usually means engine overspeed condition.
Driver input, transmission behavior, or a control issue is usually the first place to look.
P0220
Powertrain
P0220 usually means throttle position sensor B has a circuit malfunction.
A bad throttle-position sensor, wiring fault, or connector issue is usually the first place to look.
P0221
Powertrain
P0221 usually means throttle position sensor B is out of range or performing poorly.
A worn sensor, wiring issue, or sticky throttle body is usually the first place to look.
P0222
Powertrain
P0222 usually means throttle position sensor B is reading too low.
A shorted sensor, damaged connector, or wiring fault is usually the first place to look.
P0223
Powertrain
P0223 usually means throttle position sensor B is reading too high.
A wiring open, failed sensor, or bad connector is usually the first place to look.
P0224
Powertrain
P0224 usually means throttle position sensor B is intermittent or erratic.
A loose connector, damaged harness, or failing sensor is usually the first place to look.
P0225
Powertrain
P0225 usually means throttle position sensor C has a circuit malfunction.
A bad throttle-position sensor, wiring fault, or connector issue is usually the first place to look.
P0226
Powertrain
P0226 usually means throttle position sensor C is out of range or performing poorly.
A worn sensor, wiring issue, or sticky throttle body is usually the first place to look.
P0227
Powertrain
P0227 usually means throttle position sensor C is reading too low.
A shorted sensor, damaged connector, or wiring fault is usually the first place to look.
P0228
Powertrain
P0228 usually means throttle position sensor C is reading too high.
A wiring open, failed sensor, or bad connector is usually the first place to look.
P0229
Powertrain
P0229 usually means throttle position sensor C is intermittent or erratic.
A loose connector, damaged harness, or failing sensor is usually the first place to look.
P0230
Powertrain
P0230 usually means the fuel pump primary circuit has a malfunction.
A bad relay, wiring fault, fuse issue, or pump control problem is usually the first place to look.
P0231
Powertrain
P0231 usually means the fuel pump secondary circuit is reading too low.
A voltage drop, wiring fault, weak relay output, or pump-side issue is usually the first place to look.
P0232
Powertrain
P0232 usually means the fuel pump secondary circuit is reading too high.
A wiring short, relay fault, or pump-control problem is usually the first place to look.
P0233
Powertrain
P0233 usually means the fuel pump secondary circuit is intermittent.
A loose connector, failing relay, or broken harness is usually the first place to look.
P0234
Powertrain
P0234 usually means the turbo or supercharger is producing too much boost.
A stuck wastegate, boost-control fault, or vacuum/solenoid issue is usually the first place to look.
P0235
Powertrain
P0235 usually means boost sensor A has a circuit malfunction.
A bad sensor, wiring fault, or disconnected boost hose is usually the first place to look.
P0236
Powertrain
P0236 usually means boost sensor A is out of range or performing poorly.
A sensor bias, hose problem, or boost-control issue is usually the first place to look.
P0237
Powertrain
P0237 usually means boost sensor A is reading too low.
A wiring short, bad sensor, or hose leak is usually the first place to look.
P0238
Powertrain
P0238 usually means boost sensor A is reading too high.
A wiring open, bad sensor, or blocked reference line is usually the first place to look.
P0239
Powertrain
P0239 usually means boost sensor B is out of range or performing poorly.
A sensor bias, wiring issue, or boost-control mismatch is usually the first place to look.
P0240
Powertrain
P0240 means the boost control system is not behaving as expected.
A boost sensor issue, wastegate control fault, or boost leak is often the first place to look.
P0241
Powertrain
P0241 means the boost control signal is reading too low.
A vacuum leak, weak actuator, or under-reading boost sensor is often the first place to look.
P0242
Powertrain
P0242 means the boost control signal is reading too high.
A stuck wastegate, overactive control solenoid, or bad boost signal is often the first place to look.
P0243
Powertrain
P0243 means the boost control solenoid circuit has a fault.
A failed solenoid, wiring fault, or vacuum-side issue is usually the first place to look.
P0244
Powertrain
P0244 means the boost control solenoid is not performing within the expected range.
A weak solenoid, sticky wastegate, or vacuum leak is often the first place to look.
P0245
Powertrain
P0245 means the boost control solenoid circuit is reading too low.
A short-to-ground, weak solenoid, or wiring fault is often the first place to look.
P0246
Powertrain
P0246 means the boost control solenoid circuit is reading too high.
An open circuit, bad solenoid, or poor connector contact is often the first place to look.
P0247
Powertrain
P0247 means the boost control solenoid signal is intermittent or unstable.
A loose connector, harness fault, or solenoid that fails with heat or vibration is often the first place to look.
P0248
Powertrain
P0248 means the secondary boost control path has a fault.
A second boost-control solenoid, actuator, or wiring problem is usually the first place to look.
P0249
Powertrain
P0249 means the secondary boost control path is out of range or not responding properly.
A weak secondary solenoid, sticky actuator, or vacuum leak is often the first place to look.
P0250
Powertrain
P0250 means the secondary boost control circuit is reading too low.
A short-to-ground, weak secondary solenoid, or wiring fault is often the first place to look.
P0251
Powertrain
P0251 means the secondary boost control circuit is reading too high.
An open circuit, failed secondary solenoid, or connector problem is often the first place to look.
P0252
Powertrain
P0252 means the fuel metering control circuit is not responding properly.
A fuel metering valve fault, wiring issue, or low fuel supply is often the first place to look.
P0253
Powertrain
P0253 means the fuel metering control circuit is reading too low.
A short-to-ground, weak metering valve, or wiring fault is often the first place to look.
P0254
Powertrain
P0254 means the fuel metering control circuit is reading too high.
An open circuit, bad metering valve, or connector problem is often the first place to look.
P0255
Powertrain
P0255 means the fuel metering control signal is intermittent or unstable.
A loose connector, harness fault, or metering valve that fails with heat is often the first place to look.
P0256
Powertrain
P0256 means the secondary fuel metering control circuit is not behaving as expected.
A second metering valve, wiring fault, or fuel supply issue is often the first place to look.
P0257
Powertrain
P0257 means the secondary fuel metering control signal is reading too low.
A short-to-ground, weak secondary valve, or wiring fault is often the first place to look.
P0258
Powertrain
P0258 means the secondary fuel metering control signal is reading too high.
An open circuit, bad secondary valve, or connector problem is often the first place to look.
P0259
Powertrain
P0259 means the secondary fuel metering control signal is intermittent or unstable.
A loose connector, harness fault, or secondary valve that fails with heat is often the first place to look.
P0260
Powertrain
P0260 usually means injector circuit malfunction for cylinder 2.
A connector issue, wiring fault, or failed injector is usually the first place to look.
P0261
Powertrain
P0261 usually means injector circuit malfunction for cylinder 1.
A connector problem, wiring fault, or failed injector is usually the first place to look.
P0262
Powertrain
P0262 usually means injector circuit malfunction for cylinder 3.
A wiring issue, connector problem, or failed injector is usually the first place to look.
P0263
Powertrain
P0263 usually means cylinder 1 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem on cylinder 1 is usually the first place to look.
P0264
Powertrain
P0264 usually means injector circuit malfunction for cylinder 2.
A connector issue, wiring fault, or failed injector is usually the first place to look.
P0265
Powertrain
P0265 usually means cylinder 1 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem on cylinder 1 is usually the first place to look.
P0266
Powertrain
P0266 usually means cylinder 2 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem on cylinder 2 is usually the first place to look.
P0267
Powertrain
P0267 usually means cylinder 3 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem on cylinder 3 is usually the first place to look.
P0268
Powertrain
P0268 usually means cylinder 4 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem on cylinder 4 is usually the first place to look.
P0269
Powertrain
P0269 usually means cylinder 3 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem on cylinder 3 is usually the first place to look.
P0270
Powertrain
P0270 usually means cylinder 4 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0271
Powertrain
P0271 usually means cylinder 5 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0272
Powertrain
P0272 usually means cylinder 6 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0273
Powertrain
P0273 usually means cylinder 7 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0274
Powertrain
P0274 usually means cylinder 8 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0275
Powertrain
P0275 usually means cylinder 5 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0276
Powertrain
P0276 usually means cylinder 6 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0277
Powertrain
P0277 usually means cylinder 7 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0278
Powertrain
P0278 usually means cylinder 8 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0279
Powertrain
P0279 usually means cylinder 6 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0280
Powertrain
P0280 usually means cylinder 7 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0281
Powertrain
P0281 usually means cylinder 8 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0282
Powertrain
P0282 usually means cylinder 4 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0283
Powertrain
P0283 usually means cylinder 5 contribution or balance is lower than expected.
An injector issue, ignition weakness, or compression problem is usually the first place to look.
P0284
Powertrain
P0284 usually means cylinder 8 contribution or balance is lower than expected.
A weak injector, ignition issue, or compression problem on cylinder 8 is usually the first place to look.
P0285
Powertrain
P0285 usually means cylinder 9 contribution or balance is lower than expected.
A weak injector, ignition issue, or compression problem on cylinder 9 is usually the first place to look.
P0286
Powertrain
P0286 usually means cylinder 10 contribution or balance is lower than expected.
A weak injector, ignition issue, or compression problem on cylinder 10 is usually the first place to look.
P0287
Powertrain
P0287 usually means cylinder 11 contribution or balance is lower than expected.
A weak injector, ignition issue, or compression problem on cylinder 11 is usually the first place to look.
P0288
Powertrain
P0288 usually means cylinder 12 contribution or balance is lower than expected.
A weak injector, ignition issue, or compression problem on cylinder 12 is usually the first place to look.
P0289
Powertrain
P0289 usually means cylinder 13 injector circuit high.
Cylinder 13 injector circuit high is the first generic clue, but confirmation matters before parts replacement.
P0290
Powertrain
P0290 usually means cylinder 10 contribution or balance is low on many systems.
A weak injector, ignition issue, or compression problem on cylinder 10 is usually the first place to look.
P0291
Powertrain
P0291 usually means cylinder 11 contribution or balance is low on many systems.
A weak injector, ignition issue, or compression problem on cylinder 11 is usually the first place to look.
P0292
Powertrain
P0292 usually means cylinder 12 contribution or balance is low on many systems.
A weak injector, ignition issue, or compression problem on cylinder 12 is usually the first place to look.
P0293
Powertrain
P0293 usually means cylinder 11 contribution or balance is low on many systems.
A weak injector, ignition issue, or compression problem on cylinder 11 is usually the first place to look.
P0294
Powertrain
P0294 usually means cylinder 12 contribution or balance is low on many systems.
A weak injector, ignition issue, or compression problem on cylinder 12 is usually the first place to look.
P0295
Powertrain
P0295 usually means cylinder 13 contribution or balance is low on many systems.
A weak injector, ignition issue, or compression problem on cylinder 13 is usually the first place to look.
P0296
Powertrain
P0296 usually means cylinder 14 contribution or balance is low on many systems.
A weak injector, ignition issue, or compression problem on cylinder 14 is usually the first place to look.
P0304
Powertrain
P0304 usually means cylinder 4 is misfiring.
A worn spark plug, weak coil, injector problem, vacuum leak, or compression issue on cylinder 4 is the first place to look.
P0305
Powertrain
P0305 usually means cylinder 5 is misfiring.
A worn spark plug, weak coil, injector problem, vacuum leak, or compression issue on cylinder 5 is the first place to look.
P0306
Powertrain
P0306 usually means cylinder 6 is misfiring.
A worn spark plug, weak coil, injector problem, vacuum leak, or compression issue on cylinder 6 is the first place to look.
P0307
Powertrain
P0307 usually means cylinder 7 is misfiring.
A worn spark plug, weak coil, injector problem, vacuum leak, or compression issue on cylinder 7 is the first place to look.
P0308
Powertrain
P0308 usually means cylinder 8 is misfiring.
A worn spark plug, weak coil, injector problem, vacuum leak, or compression issue on cylinder 8 is the first place to look.
P0309
Powertrain
P0309 means cylinder 9 is misfiring.
A worn spark plug, weak coil, injector issue, or air leak on cylinder 9 is usually the first place to look.
P0311
Powertrain
P0311 means cylinder 11 is misfiring.
A worn spark plug, weak coil, injector issue, or air leak on cylinder 11 is usually the first place to look.
P0312
Powertrain
P0312 means cylinder 12 is misfiring.
A worn spark plug, weak coil, injector issue, or air leak on cylinder 12 is usually the first place to look.
P0320
Powertrain
P0320 usually means the ignition or engine-speed input circuit is not behaving correctly.
A crank sensor, distributor pickup, ignition module, or wiring fault is the first place to look.
P0321
Powertrain
P0321 usually means the engine-speed input signal is out of normal range or performance.
A crank sensor, ignition module, trigger wheel, or wiring problem is the first place to look.
P0322
Powertrain
P0322 usually means the engine-speed input signal is missing.
A failed crank sensor, ignition module, or wiring fault is the first place to look.
P0323
Powertrain
P0323 usually means the engine-speed input signal is intermittent.
A loose connector, cracked sensor, heat-related wiring fault, or failing ignition module is the first place to look.
P0326
Powertrain
P0326 usually means knock sensor 1 is reporting an out-of-range or performance problem.
A sensor, wiring, or mounting issue is the first place to look.
P0327
Powertrain
P0327 usually means knock sensor 1 is reading too low.
A sensor, connector, wiring, or mounting issue is the first place to look.
P0328
Powertrain
P0328 usually means knock sensor 1 is reading too high.
A sensor, wiring, or real detonation issue is the first place to look.
P0329
Powertrain
P0329 usually means knock sensor 1 is responding intermittently.
A loose connector, damaged harness, or weak sensor is the first place to look.
P0330
Powertrain
P0330 usually means knock sensor 2 is reporting an out-of-range or performance problem.
A sensor, wiring, or mounting issue is the first place to look.
P0331
Powertrain
P0331 usually means knock sensor 2 is reading too low.
A sensor, connector, wiring, or mounting issue is the first place to look.
P0332
Powertrain
P0332 usually means knock sensor 2 is reading too high.
A sensor, wiring, or real detonation issue is the first place to look.
P0333
Powertrain
P0333 usually means knock sensor 2 is responding intermittently.
A loose connector, damaged harness, or weak sensor is the first place to look.
P0334
Powertrain
P0334 usually means knock sensor 2 is behaving intermittently or dropping out.
A loose connector, damaged harness, or failing sensor is the first place to look.
P0335
Powertrain
P0335 usually means the crankshaft position sensor A circuit is not behaving correctly.
A crank sensor, connector, wiring, or trigger-wheel fault is the first place to look.
P0336
Powertrain
P0336 usually means the crankshaft position sensor A signal is out of normal range or performance.
A crank sensor, connector, wiring, or trigger-wheel issue is the first place to look.
P0337
Powertrain
P0337 usually means the crankshaft position sensor A signal is reading too low.
A crank sensor, wiring, or trigger-wheel issue is the first place to look.
P0338
Powertrain
P0338 usually means the crankshaft position sensor A signal is reading too high.
A sensor, wiring, or trigger-wheel issue is the first place to look.
P0339
Powertrain
P0339 usually means the crankshaft position sensor A signal is intermittent.
A loose connector, damaged harness, or failing sensor is the first place to look.
P0340
Powertrain
P0340 usually means the bank 1 camshaft position sensor circuit is not behaving correctly.
A failed cam sensor, wiring issue, or connector problem is usually the first place to look.
P0341
Powertrain
P0341 usually means the bank 1 camshaft signal is outside the expected range or performance window.
A biased cam sensor, timing issue, or wiring problem is usually the first place to look.
P0342
Powertrain
P0342 usually means the bank 1 camshaft signal is reading too low.
A shorted signal, connector issue, or failed sensor is usually the first place to look.
P0343
Powertrain
P0343 usually means the bank 1 camshaft signal is reading too high.
An open circuit, connector issue, or failed sensor is usually the first place to look.
P0344
Powertrain
P0344 usually means the bank 1 camshaft signal is intermittent or erratic.
A loose connector, broken wire, or sensor that fails only sometimes is usually the first place to look.
P0350
Powertrain
P0350 usually means ignition coil 0 circuit malfunction.
A bad coil, damaged wiring, or a connector problem on coil 0 is the first place to look.
P0351
Powertrain
P0351 usually means the ignition coil A circuit is not behaving as expected.
A bad coil, damaged wiring, or a connector problem on coil A is the first place to look.
P0352
Powertrain
P0352 usually means the ignition coil B circuit is not behaving as expected.
A bad coil, damaged wiring, or a connector problem on coil B is the first place to look.
P0353
Powertrain
P0353 usually means the ignition coil C circuit is not behaving as expected.
A bad coil, damaged wiring, or a connector problem on coil C is the first place to look.
P0354
Powertrain
P0354 usually means the ignition coil D circuit is not behaving as expected.
A bad coil, damaged wiring, or a connector problem on coil D is the first place to look.
P0355
Powertrain
P0355 usually means ignition coil 5 circuit malfunction.
A bad coil, damaged wiring, or a connector problem on coil 5 is the first place to look.
P0356
Powertrain
P0356 usually means ignition coil 6 circuit malfunction.
A bad coil, damaged wiring, or a connector problem on coil 6 is the first place to look.
P0357
Powertrain
P0357 usually means ignition coil 7 circuit malfunction.
A bad coil, damaged wiring, or a connector problem on coil 7 is the first place to look.
P0358
Powertrain
P0358 usually means ignition coil 8 circuit malfunction.
A bad coil, damaged wiring, or a connector problem on coil 8 is the first place to look.
P0359
Powertrain
P0359 usually means ignition coil 9 circuit malfunction.
A bad coil, damaged wiring, or a connector problem on coil 9 is the first place to look.
P0360
Powertrain
P0360 usually means ignition coil J circuit malfunction.
A bad coil, damaged wiring, or a connector problem on coil J is the first place to look.
P0361
Powertrain
P0361 usually means ignition coil 1 circuit malfunction.
A bad coil, damaged wiring, or a connector problem on coil 1 is the first place to look.
P0362
Powertrain
P0362 usually means ignition coil 2 circuit malfunction.
A bad coil, damaged wiring, or a connector problem on coil 2 is the first place to look.
P0370
Powertrain
P0370 usually means the high-resolution timing reference signal A is not behaving correctly.
A sensor signal problem, wiring issue, or trigger-wheel problem is usually the first place to look.
P0371
Powertrain
P0371 usually means the high-resolution timing reference signal A has too many pulses.
A sensor pattern problem, signal noise, or timing reference fault is usually the first place to look.
P0372
Powertrain
P0372 usually means the high-resolution timing reference signal A has too few pulses.
A missing pulse, wiring issue, or trigger-wheel problem is usually the first place to look.
P0373
Powertrain
P0373 usually means the high-resolution timing reference signal A is intermittent or erratic.
A loose connector, broken wire, or sensor that drops out is usually the first place to look.
P0374
Powertrain
P0374 usually means the high-resolution timing reference signal A has no pulses.
A dead sensor, open circuit, or trigger-wheel issue is usually the first place to look.
P0375
Powertrain
P0375 usually means the high-resolution timing reference signal B is not behaving correctly.
A sensor signal problem, wiring issue, or trigger-wheel problem is usually the first place to look.
P0376
Powertrain
P0376 means the engine timing reference high-resolution signal has too many pulses.
A timing sensor, tone wheel, or wiring fault is usually the first place to look.
P0377
Powertrain
P0377 means the engine timing reference high-resolution signal has too few pulses.
A timing sensor, tone wheel, or wiring fault is usually the first place to look.
P0378
Powertrain
P0378 means the engine timing reference high-resolution signal is intermittent or erratic.
A loose sensor, wiring fault, or debris issue is usually the first place to look.
P0379
Powertrain
P0379 means the engine timing reference high-resolution signal has no pulses.
A dead sensor, open circuit, or damaged target wheel is usually the first place to look.
P0380
Powertrain
P0380 usually means the diesel glow-plug or heater circuit A is not behaving correctly.
A failed glow plug, relay, fuse, or wiring issue is the first place to look.
P0381
Powertrain
P0381 means the glow plug or heater indicator circuit is malfunctioning.
A glow plug relay, fuse, indicator circuit, or wiring fault is usually the first place to look on diesel vehicles.
P0382
Powertrain
P0382 means the glow plug or heater circuit is reading low or weak.
A weak glow plug, relay, fuse, or wiring fault is usually the first place to look on diesel vehicles.
P0385
Powertrain
P0385 means the crankshaft position sensor B circuit has a malfunction.
A failed sensor, wiring fault, or connector problem is usually the first place to look.
P0386
Powertrain
P0386 means the crankshaft position sensor B signal is out of range or not believable.
A weak sensor, wiring fault, or tone wheel issue is usually the first place to look.
P0387
Powertrain
P0387 means the crankshaft position sensor B signal is too low or missing.
A failed sensor, open circuit, or connector problem is usually the first place to look.
P0388
Powertrain
P0388 means the crankshaft position sensor B signal is too high.
A sensor fault, wiring problem, or distorted reference wheel is usually the first place to look.
P0389
Powertrain
P0389 means the crankshaft position sensor B signal is intermittent.
A loose sensor, wiring fault, or heat-related sensor failure is usually the first place to look.
P0400
Powertrain
P0400 usually means the EGR system is not flowing exhaust gas the way it should.
A blocked EGR passage, stuck valve, or control-side fault is usually the first place to look.
P0403
Powertrain
P0403 usually means the EGR control circuit has a malfunction.
A wiring fault, bad solenoid, or connector issue is usually the first place to look.
P0404
Powertrain
P0404 usually means the EGR system is out of range or performing poorly.
Carbon buildup, a sticky valve, or a control-side fault is usually the first place to look.
P0405
Powertrain
P0405 usually means the EGR position sensor is reading too low.
A bad position sensor, wiring fault, or connector issue is usually the first place to look.
P0406
Powertrain
P0406 usually means the EGR position sensor is reading too high.
A wiring open, bad sensor, or connector fault is usually the first place to look.
P0407
Powertrain
P0407 usually means the EGR sensor B circuit is reading too low.
A wiring short, bad sensor, or connector issue is usually the first place to look.
P0408
Powertrain
P0408 usually means the EGR sensor B circuit is reading too high.
A wiring open, bad sensor, or connector fault is usually the first place to look.
P0410
Powertrain
P0410 usually means the secondary air injection system is not working properly.
A failed air pump, bad relay, valve issue, or clogged air passage is usually the first place to look.
P0411
Powertrain
P0411 usually means the secondary air injection flow is incorrect.
A clogged hose, stuck valve, or weak pump is usually the first place to look.
P0412
Powertrain
P0412 usually means the secondary air injection control circuit has a malfunction.
A wiring fault, relay problem, or valve control issue is usually the first place to look.
P0413
Powertrain
P0413 usually means the secondary air injection valve circuit is malfunctioning.
A wiring fault, failed valve, or connector issue is usually the first place to look.
P0414
Powertrain
P0414 usually means the secondary air injection switch valve A is shorted or malfunctioning.
A bad valve, shorted wiring, or connector fault is usually the first place to look.
P0415
Powertrain
P0415 usually means the secondary air injection switch valve B has a circuit malfunction.
A bad valve, wiring fault, or connector issue is usually the first place to look.
P0416
Powertrain
P0416 usually means the secondary air system switch valve B is malfunctioning.
A failed valve, wiring fault, or vacuum issue is usually the first place to look.
P0417
Powertrain
P0417 usually means the secondary air system switch valve B circuit is shorted.
A wiring short, bad connector, or failed valve circuit is usually the first place to look.
P0418
Powertrain
P0418 usually means the secondary air pump relay A circuit has a malfunction.
A bad relay, fuse issue, or wiring fault is usually the first place to look.
P0419
Powertrain
P0419 usually means the secondary air pump relay B circuit has a malfunction.
A bad relay, wiring fault, or pump-control issue is usually the first place to look.
P0421
Powertrain
P0421 usually means the warm-up catalyst on bank 1 is not reaching efficiency quickly enough.
A tired catalyst, exhaust leak, or upstream running issue is usually the first place to look.
P0422
Powertrain
P0422 usually means the main catalyst on bank 1 is not efficient enough.
A worn converter, exhaust leak, or upstream fueling problem is usually the first place to look.
P0423
Powertrain
P0423 usually means the heated catalyst on bank 1 is not working efficiently.
A tired heated catalyst, exhaust leak, or upstream running issue is usually the first place to look.
P0424
Powertrain
P0424 means the warm-up catalyst on bank 1 is not reaching expected performance.
An exhaust leak, aging catalyst, or upstream mixture issue is often the first place to look.
P0431
Powertrain
P0431 means the warm-up catalyst on bank 2 is not reaching expected performance.
An exhaust leak, aging catalyst, or upstream mixture issue is often the first place to look.
P0432
Powertrain
P0432 means the main catalyst on bank 1 is not reaching expected efficiency.
A tired catalytic converter, exhaust leak, or upstream engine-running issue is often the first place to look.
P0433
Powertrain
P0433 means the warm-up catalyst on bank 2 is not reaching expected efficiency.
An exhaust leak, aging catalyst, or upstream mixture issue is often the first place to look.
P0434
Powertrain
P0434 means the warm-up catalyst on bank 1 is not reaching expected efficiency.
An exhaust leak, aging catalyst, or upstream mixture issue is often the first place to look.
P0442
Powertrain
P0442 usually means the EVAP system has detected a small leak.
A fuel-cap seal, hose leak, or purge/vent valve leak is the first place to look.
P0443
Powertrain
P0443 usually means the EVAP purge control circuit is not behaving correctly.
A wiring issue, connector problem, or failed purge solenoid is the first place to look.
P0444
Powertrain
P0444 usually means the EVAP purge valve circuit is open.
An open harness, bad connector, or failed purge valve coil is the first place to look.
P0445
Powertrain
P0445 means the EVAP purge control valve circuit is shorted or behaving unusually.
A purge valve wiring fault, stuck valve, or connector problem is usually the first place to look.
P0446
Powertrain
P0446 usually means the EVAP vent control system is not behaving correctly.
A vent valve issue, blocked canister path, or wiring fault is the first place to look.
P0447
Powertrain
P0447 means the EVAP vent control circuit is open or not responding properly.
A vent valve wiring fault, stuck vent valve, or connector problem is usually the first place to look.
P0448
Powertrain
P0448 means the EVAP vent control circuit is shorted or behaving unusually.
A shorted vent valve circuit, stuck valve, or wiring fault is usually the first place to look.
P0449
Powertrain
P0449 usually means the EVAP vent control circuit is not behaving correctly.
A wiring problem, bad vent valve, or blown feed issue is the first place to look.
P0450
Powertrain
P0450 means the fuel tank pressure sensor circuit is not working properly.
A bad fuel tank pressure sensor, wiring fault, or connector problem is usually the first place to look.
P0451
Powertrain
P0451 means the fuel tank pressure sensor is reading outside the expected range.
A drifting sensor, wiring fault, or real EVAP leak is usually the first place to look.
P0452
Powertrain
P0452 usually means the EVAP pressure sensor is reading too low.
A sensor bias, connector problem, or wiring issue is usually the first place to look.
P0453
Powertrain
P0453 usually means the EVAP pressure sensor is reading too high.
An open circuit, failed sensor, or connector problem is usually the first place to look.
P0454
Powertrain
P0454 usually means the EVAP pressure sensor signal is intermittent.
A loose connector, broken wire, or flaky pressure sensor is the first place to look.
P0460
Powertrain
P0460 means the fuel level sensor circuit is not working properly.
A bad fuel level sender, wiring fault, or connector problem is usually the first place to look.
P0461
Powertrain
P0461 means the fuel level sensor is reading outside the expected range.
A worn sender, wiring fault, or tank movement issue is often the first place to look.
P0462
Powertrain
P0462 means the fuel level sensor is reading too low.
A bad sender, open circuit, or fuel level float fault is usually the first place to look.
P0463
Powertrain
P0463 means the fuel level sensor is reading too high.
A bad sender, open circuit, or float problem is usually the first place to look.
P0464
Powertrain
P0464 means the fuel level sensor signal is intermittent or unstable.
A loose connector, worn sender, or harness fault is usually the first place to look.
P0465
Powertrain
P0465 means the purge flow sensor circuit is not working properly.
A bad purge flow sensor, wiring fault, or EVAP hose issue is usually the first place to look.
P0466
Powertrain
P0466 means the purge flow sensor is reading outside the expected range.
A drifting purge sensor, vacuum leak, or purge valve behavior issue is usually the first place to look.
P0467
Powertrain
P0467 means the purge flow sensor is reading too low.
A shorted sensor, wiring fault, or blocked purge path is usually the first place to look.
P0468
Powertrain
P0468 means the purge flow sensor is reading too high.
An open circuit, bad sensor, or connector problem is usually the first place to look.
P0469
Powertrain
P0469 means the purge flow sensor signal is intermittent or unstable.
A loose connector, harness fault, or purge sensor that fails with heat is usually the first place to look.
P0470
Powertrain
P0470 usually means the exhaust pressure sensor circuit has a malfunction.
An exhaust pressure sensor, connector, or wiring fault is usually the first place to look.
P0471
Powertrain
P0471 usually means the exhaust pressure sensor reading is out of range or not performing correctly.
A sensor bias, blocked pressure line, or wiring problem is usually the first place to look.
P0472
Powertrain
P0472 usually means the exhaust pressure sensor is reading too low.
A sensor signal problem, blocked line, or connector fault is usually the first place to look.
P0473
Powertrain
P0473 usually means the exhaust pressure sensor is reading too high.
A sensor bias, blocked line, or wiring fault is usually the first place to look.
P0474
Powertrain
P0474 usually means the exhaust pressure sensor is intermittent.
A loose connector, damaged harness, or sensor that fails under heat is usually the first place to look.
P0475
Powertrain
P0475 usually means the exhaust pressure control valve has a malfunction.
A stuck valve, carbon buildup, or a circuit issue at the control valve is usually the first place to look.
P0476
Powertrain
P0476 usually means the exhaust pressure control valve is out of range or not performing correctly.
A partially stuck valve, carbon buildup, or circuit issue is usually the first place to look.
P0477
Powertrain
P0477 usually means the exhaust pressure control valve signal is reading too low.
A valve fault, connector problem, or wiring issue is usually the first place to look.
P0478
Powertrain
P0478 usually means the exhaust pressure control valve signal is reading too high.
A valve bias, soot buildup, or circuit fault is usually the first place to look.
P0479
Powertrain
P0479 usually means the exhaust pressure control valve is intermittent.
A loose connector, damaged harness, or heat-sensitive valve is usually the first place to look.
P0480
Powertrain
P0480 usually means the main cooling fan control circuit has a malfunction.
A fan relay, fan motor, fuse, or wiring fault is usually the first place to look.
P0481
Powertrain
P0481 usually means cooling fan 2 has a control circuit malfunction.
A fan relay, control module, motor, or wiring fault for the second fan stage is usually the first place to look.
P0482
Powertrain
P0482 usually means cooling fan 3 has a control circuit malfunction.
A relay, module, motor, or wiring fault for the third fan stage is usually the first place to look.
P0483
Powertrain
P0483 usually means the cooling fan rationality check has failed.
A control-module, relay, fan-speed, or wiring issue is usually the first place to look.
P0484
Powertrain
P0484 usually means the cooling fan has an over-speed or excessive-speed fault.
A fan control module, relay, or feedback circuit issue is usually the first place to look.
P0485
Powertrain
P0485 usually means the cooling fan power or ground circuit has a malfunction.
A power-feed, ground, or connector fault is usually the first place to look.
P0500
Powertrain
P0500 usually means the vehicle speed sensor circuit has a malfunction.
A vehicle speed sensor, connector, or wiring fault is usually the first place to look.
P0501
Powertrain
P0501 usually means the vehicle speed sensor is out of range or not performing properly.
A speed sensor, wiring issue, or tone ring problem is usually the first place to look.
P0502
Powertrain
P0502 usually means the vehicle speed sensor is reading too low.
A failing speed sensor, wiring fault, or damaged pickup path is usually the first place to look.
P0503
Powertrain
P0503 usually means the vehicle speed sensor signal is intermittent or erratic.
A loose connector, damaged harness, or failing sensor that drops out under vibration is usually the first place to look.
P0505
Powertrain
P0505 usually means the idle control system is not holding normal idle speed.
A dirty throttle body, vacuum leak, or idle-air control problem is the first place to look.
P0506
Powertrain
P0506 usually means the idle speed is lower than the ECU expects.
A dirty throttle body, air leak, or sticky idle-control path is the first place to look.
P0507
Powertrain
P0507 usually means the idle speed is higher than the ECU expects.
A vacuum leak, dirty throttle body, or idle-control relearn issue is the first place to look.
P0510
Powertrain
P0510 usually means the closed-throttle position switch or signal is not behaving correctly.
A throttle switch, throttle-body sensor, or wiring issue is the first place to look.
P0520
Powertrain
P0520 usually means the engine oil pressure sensor or switch circuit is not behaving correctly.
A faulty oil pressure sensor, switch, or wiring issue is the first place to look.
P0521
Powertrain
P0521 usually means the engine oil pressure reading is out of normal range or performance.
A failing oil pressure sender, wiring issue, or actual oil pressure problem is the first place to look.
P0522
Powertrain
P0522 usually means the engine oil pressure sensor circuit is reading too low.
A faulty sender, wiring issue, or real low oil pressure is the first place to look.
P0523
Powertrain
P0523 usually means the engine oil pressure sensor circuit is reading too high.
A sensor, wiring, or reference-voltage problem is the first place to look.
P0530
Powertrain
P0530 usually means the A/C refrigerant pressure sensor circuit is not behaving correctly.
A faulty pressure sensor, wiring issue, or low/high refrigerant pressure is the first place to look.
P0531
Powertrain
P0531 usually means the A/C refrigerant pressure reading is out of normal range or performance.
A pressure sensor, wiring issue, or refrigerant-charge problem is the first place to look.
P0532
Powertrain
P0532 usually means the A/C refrigerant pressure sensor is reading too low.
A low refrigerant charge, failed pressure sensor, or wiring issue is the first place to look.
P0533
Powertrain
P0533 usually means the A/C refrigerant pressure sensor is reading too high.
A biased pressure sensor, wiring fault, or overcharged system is the first place to look.
P0534
Powertrain
P0534 usually means the A/C refrigerant charge has been lost or the pressure signal is invalid after a loss of charge.
A refrigerant leak or empty A/C system is the first place to look.
P0550
Powertrain
P0550 usually means the power steering pressure sensor or switch circuit is not behaving correctly.
A faulty pressure sensor, wiring issue, or switch problem is the first place to look.
P0551
Powertrain
P0551 usually means the power steering pressure signal is out of normal range or performance.
A sensor, wiring, fluid leak, or pump-side problem is the first place to look.
P0552
Powertrain
P0552 usually means the power steering pressure signal is reading too low.
A sensor, wiring, low-fluid, or pump issue is the first place to look.
P0553
Powertrain
P0553 usually means the power steering pressure signal is reading too high.
A sensor, wiring, or pump/load mismatch is the first place to look.
P0554
Powertrain
P0554 usually means the power steering pressure signal is intermittent.
A loose connector, damaged harness, or failing sensor is the first place to look.
P0560
Powertrain
P0560 usually means the system voltage is not behaving normally.
A battery, alternator, connection, or charging-system issue is the first place to look.
P0561
Powertrain
P0561 usually means the system voltage is unstable or outside the normal range.
A battery, alternator, connection, or ground fault is the first place to look.
P0562
Powertrain
P0562 usually means system voltage is too low.
A weak battery, charging-system fault, or bad connection is usually the first place to look.
P0563
Powertrain
P0563 usually means system voltage is too high.
A charging-system regulation fault, wiring issue, or bad voltage reading is usually the first place to look.
P0565
Powertrain
P0565 usually means cruise control on signal malfunction.
A switch, button, or steering-wheel control issue is usually the first place to look.
P0566
Powertrain
P0566 usually means cruise control off signal malfunction.
A switch, stalk, or steering-wheel control problem is usually the first place to look.
P0567
Powertrain
P0567 usually means cruise control resume signal malfunction.
A switch, stalk, or steering-wheel control problem is usually the first place to look.
P0568
Powertrain
P0568 usually means cruise control set signal malfunction.
A switch, stalk, or steering-wheel control problem is usually the first place to look.
P0569
Powertrain
P0569 usually means cruise control coast signal malfunction.
A switch, stalk, or steering-wheel control problem is usually the first place to look.
P0570
Powertrain
P0570 usually means cruise control accelerate signal malfunction.
A switch, stalk, or steering-wheel control problem is usually the first place to look.
P0571
Powertrain
P0571 usually means brake switch A circuit malfunction.
A brake switch, connector, or pedal-adjustment issue is usually the first place to look.
P0572
Powertrain
P0572 usually means brake switch A circuit is reading too low.
A brake switch that is stuck low, misadjusted, or wired poorly is usually the first place to look.
P0573
Powertrain
P0573 usually means brake switch A circuit is reading too high.
A brake switch that is stuck high, misadjusted, or wired poorly is usually the first place to look.
P0574
Powertrain
P0574 usually means cruise control system vehicle speed too high.
A speed-signal issue, cruise system fault, or vehicle setup mismatch is usually the first place to look.
P0575
Powertrain
P0575 usually means cruise control input circuit malfunction.
A switch, steering-wheel control, or wiring issue is usually the first place to look.
P0576
Powertrain
P0576 usually means cruise control input circuit is reading too low.
A switch, wiring, or connector issue is usually the first place to look.
P0578
Powertrain
P0578 usually means cruise control input circuit is reading too high.
A switch, wiring, or connector issue is usually the first place to look.
P0579
Powertrain
P0579 usually means cruise control multi-function input A circuit malfunction.
A switch pack, steering-wheel control, or wiring issue is usually the first place to look.
P0580
Powertrain
P0580 usually means cruise control multi-function input A circuit is reading too low.
A switch pack, steering-wheel control, or wiring issue is usually the first place to look.
P0600
Powertrain
P0600 usually means there is a serial communication link malfunction.
A wiring fault, poor connector, or module communication problem is usually the first place to look.
P0601
Powertrain
P0601 usually means the internal control module memory checksum is incorrect.
A module power issue, poor grounding, or internal module failure is usually the first place to look.
P0602
Powertrain
P0602 usually means the control module has been programmed incorrectly.
A programming issue, replacement module mismatch, or failed reflash is usually the first place to look.
P0603
Powertrain
P0603 usually means the control module keep-alive memory has failed.
A battery, power-supply, or module memory issue is usually the first place to look.
P0604
Powertrain
P0604 usually means the internal control module random access memory has failed.
A module power event, software issue, or internal memory failure is usually the first place to look.
P0605
Powertrain
P0605 usually means the internal control module read-only memory has failed.
A module power event, bad software, or internal module failure is usually the first place to look.
P0606
Powertrain
P0606 usually means the powertrain control module has a processor fault.
A power issue, software problem, or internal PCM failure is usually the first place to look.
P0608
Powertrain
P0608 usually means the vehicle speed output circuit has a malfunction.
A wiring fault, cluster issue, or control module output problem is usually the first place to look.
P0609
Powertrain
P0609 usually means the control module VSS output circuit has a malfunction.
A wiring fault, cluster issue, or module output problem is usually the first place to look.
P0620
Powertrain
P0620 usually means the generator or alternator control circuit has a malfunction.
A wiring fault, alternator control issue, or regulator problem is usually the first place to look.
P0621
Powertrain
P0621 usually means the generator lamp control circuit has a malfunction.
A wiring fault, alternator control issue, or cluster circuit problem is usually the first place to look.
P0622
Powertrain
P0622 usually means the generator field control circuit has a malfunction.
A wiring fault, regulator issue, or alternator control problem is usually the first place to look.
P0650
Powertrain
P0650 usually means the malfunction indicator lamp control circuit has a malfunction.
A wiring fault, cluster issue, or ECU lamp-control problem is usually the first place to look.
P0654
Powertrain
P0654 usually means the engine speed output circuit has a malfunction.
A wiring fault, cluster issue, or ECU output problem is usually the first place to look.
P0655
Powertrain
P0655 usually means the engine hot lamp output circuit has a malfunction.
A wiring fault, cluster issue, or ECU lamp-control problem is usually the first place to look.
P0656
Powertrain
P0656 usually means the fuel level output circuit has a malfunction.
A wiring fault, cluster issue, or fuel-level sender/output problem is usually the first place to look.
P0700
Powertrain
P0700 usually means the transmission control system has a fault stored in the transmission module.
A transmission module fault, wiring issue, or another transmission code stored with it is the first place to look.
P0701
Powertrain
P0701 means the transmission control system has detected a range or performance problem.
A transmission fluid issue, control-module fault, or wiring problem is often the first place to look.
P0702
Powertrain
P0702 means the transmission control system has an electrical fault.
A wiring fault, bad power feed, or module communication issue is often the first place to look.
P0703
Powertrain
P0703 means the torque converter brake switch circuit is not behaving normally.
A bad brake switch, wiring fault, or adjustment issue is often the first place to look.
P0704
Powertrain
P0704 means the clutch switch circuit is not behaving as expected.
A bad clutch switch, adjustment problem, or wiring fault is often the first place to look.
P0705
Powertrain
P0705 usually means the transmission range sensor circuit is not behaving correctly.
A misadjusted range sensor, damaged connector, or wiring issue is the first place to look.
P0706
Powertrain
P0706 means the transmission range sensor is reading outside the expected range.
A misadjusted range sensor, wiring fault, or shifter linkage problem is often the first place to look.
P0707
Powertrain
P0707 means the transmission range sensor is reading too low.
A bad range sensor, wiring fault, or linkage issue is often the first place to look.
P0708
Powertrain
P0708 means the transmission range sensor is reading too high.
A bad range sensor, wiring fault, or linkage issue is often the first place to look.
P0709
Powertrain
P0709 means the transmission range sensor signal is intermittent or unstable.
A loose connector, harness fault, or worn sensor is often the first place to look.
P0710
Powertrain
P0710 means the transmission fluid temperature sensor circuit is not working properly.
A bad transmission fluid temperature sensor, wiring fault, or connector problem is often the first place to look.
P0711
Powertrain
P0711 means the transmission fluid temperature sensor is reading outside the expected range.
A drifting sensor, wiring fault, or actual overheating issue is often the first place to look.
P0712
Powertrain
P0712 means the transmission fluid temperature sensor is reading too low.
A shorted sensor, wiring fault, or contaminated connector is often the first place to look.
P0713
Powertrain
P0713 means the transmission fluid temperature sensor is reading too high.
A bad sensor, open circuit, or real overheating issue is often the first place to look.
P0714
Powertrain
P0714 means the transmission fluid temperature sensor signal is intermittent or unstable.
A loose connector, harness fault, or sensor that fails with heat is often the first place to look.
P0715
Powertrain
P0715 usually means the input or turbine speed sensor circuit is not behaving correctly.
A failed speed sensor, wiring issue, or connector problem is the first place to look.
P0716
Powertrain
P0716 means the input shaft speed sensor is reading outside the expected range.
A bad input speed sensor, wiring fault, or transmission mechanical issue is often the first place to look.
P0717
Powertrain
P0717 means the input shaft speed sensor signal is reading too low or not present.
A failed input speed sensor, wiring fault, or debris issue is often the first place to look.
P0718
Powertrain
P0718 means the input shaft speed sensor signal is reading too high.
A bad input speed sensor, wiring fault, or debris issue is often the first place to look.
P0719
Powertrain
P0719 means the brake switch to transmission control input is reading too low.
A bad brake switch, wiring fault, or pedal adjustment issue is often the first place to look.
P0720
Powertrain
P0720 usually means the output speed sensor circuit is not behaving correctly.
A failed output speed sensor, wiring issue, or connector problem is the first place to look.
P0721
Powertrain
P0721 means the output shaft speed sensor range or performance is not believable.
A weak output speed sensor, wiring fault, or debris issue is often the first place to look.
P0722
Powertrain
P0722 usually means the output speed sensor has no signal.
A failed sensor, open circuit, or connector problem is the first place to look.
P0723
Powertrain
P0723 means the output shaft speed sensor signal is intermittent.
A loose connector, wiring fault, or failing output speed sensor is often the first place to look.
P0724
Powertrain
P0724 means the brake switch signal to the transmission control system is stuck high or out of range.
A bad brake switch, misadjustment, or wiring fault is often the first place to look.
P0725
Powertrain
P0725 means the engine speed input circuit to the transmission control system has a fault.
A missing engine RPM signal, wiring fault, or communication issue is often the first place to look.
P0726
Powertrain
P0726 means the engine speed input signal is not believable for the operating conditions.
An unstable RPM source, wiring fault, or voltage problem is often the first place to look.
P0727
Powertrain
P0727 means the engine speed input signal is missing.
A failed engine speed source, wiring fault, or module communication problem is often the first place to look.
P0728
Powertrain
P0728 means the engine speed input signal is intermittent.
A loose connector, wiring fault, or failing engine speed source is often the first place to look.
P0730
Powertrain
P0730 usually means the transmission has detected an incorrect gear ratio.
Low fluid, a speed-sensor fault, or internal transmission slip is the first place to look.
P0731
Powertrain
P0731 usually means gear 1 incorrect ratio.
Internal slip, fluid/pressure trouble, or a control-side shift problem is the first place to look.
P0732
Powertrain
P0732 usually means gear 2 incorrect ratio.
Internal slip, fluid/pressure trouble, or a control-side shift problem is the first place to look.
P0733
Powertrain
P0733 usually means gear 3 incorrect ratio.
Internal slip, fluid/pressure trouble, or a control-side shift problem is the first place to look.
P0734
Powertrain
P0734 usually means gear 4 incorrect ratio.
Internal slip, fluid/pressure trouble, or a control-side shift problem is the first place to look.
P0735
Powertrain
P0735 usually means gear 5 incorrect ratio.
Internal slip, fluid/pressure trouble, or a control-side shift problem is the first place to look.
P0736
Powertrain
P0736 usually means reverse incorrect ratio.
Internal reverse clutch slip, fluid/pressure trouble, or a control-side shift problem is the first place to look.
P0740
Powertrain
P0740 usually means the torque converter clutch circuit is not behaving correctly.
A failed TCC solenoid, wiring issue, or fluid/control problem is the first place to look.
P0741
Powertrain
P0741 usually means torque converter clutch circuit performance or stuck off.
A tired converter is possible, but upstream engine-running faults and exhaust leaks should be ruled out first.
P0742
Powertrain
P0742 usually means torque converter clutch circuit stuck on.
A stuck converter clutch, solenoid fault, or hydraulic issue is usually the first place to look.
P0743
Powertrain
P0743 usually means torque converter clutch electrical problem.
A wiring, connector, solenoid, or control-side issue is usually the first place to look.
P0744
Powertrain
P0744 usually means torque converter clutch intermittent electrical problem.
A loose connector, damaged harness, or heat-sensitive solenoid is usually the first place to look.
P0745
Powertrain
P0745 usually means pressure control solenoid A malfunction.
A solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0746
Powertrain
P0746 usually means pressure control solenoid A performance or stuck off.
A solenoid, wiring, or hydraulic pressure-control issue is usually the first place to look.
P0747
Powertrain
P0747 usually means pressure control solenoid A stuck on.
A stuck solenoid, valve-body fault, or control-side issue is usually the first place to look.
P0748
Powertrain
P0748 usually means pressure control solenoid A electrical problem.
A wiring, connector, or solenoid electrical fault is usually the first place to look.
P0749
Powertrain
P0749 usually means pressure control solenoid A intermittent electrical problem.
A loose connector, damaged harness, or heat-sensitive solenoid is usually the first place to look.
P0750
Powertrain
P0750 usually means shift solenoid A is not behaving correctly.
A bad solenoid, wiring issue, or valve-body problem is the first place to look.
P0751
Powertrain
P0751 usually means shift solenoid A performance or stuck off.
A solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0752
Powertrain
P0752 usually means shift solenoid A stuck on.
A stuck solenoid, valve-body fault, or control-side issue is usually the first place to look.
P0754
Powertrain
P0754 usually means shift solenoid A intermittent electrical problem.
A loose connector, damaged harness, or heat-sensitive solenoid is usually the first place to look.
P0755
Powertrain
P0755 usually means shift solenoid B malfunction.
A solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0756
Powertrain
P0756 usually means shift solenoid B performance or stuck off.
A solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0757
Powertrain
P0757 usually means shift solenoid B stuck on.
A stuck solenoid, valve-body fault, or control-side issue is usually the first place to look.
P0758
Powertrain
P0758 usually means shift solenoid B electrical problem.
A wiring, connector, or solenoid electrical fault is usually the first place to look.
P0759
Powertrain
P0759 usually means shift solenoid B intermittent.
A loose connector, damaged harness, or heat-sensitive solenoid is usually the first place to look.
P0760
Powertrain
P0760 usually means shift solenoid C is not behaving correctly.
A failed solenoid, wiring issue, or valve-body fault is the first place to look.
P0761
Powertrain
P0761 usually means shift Solenoid C Performance or Stuck Off.
Shift Solenoid C Performance or Stuck Off is the first generic clue, but confirmation matters before parts replacement.
P0762
Powertrain
P0762 usually means shift Solenoid C Stuck On.
A stuck solenoid, wiring fault, or valve-body problem is usually the first place to look.
P0763
Powertrain
P0763 usually means shift Solenoid C Electrical.
A wiring, connector, fuse, or solenoid electrical problem is usually the first place to look.
P0764
Powertrain
P0764 usually means shift Solenoid C Intermittent.
A loose connector, damaged harness, or heat-sensitive solenoid is usually the first place to look.
P0765
Powertrain
P0765 usually means shift Solenoid D Malfunction.
A solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0766
Powertrain
P0766 usually means shift Solenoid D Performance or Stuck Off.
A solenoid performance issue, wiring problem, or hydraulic fault is usually the first place to look.
P0767
Powertrain
P0767 usually means shift Solenoid D Stuck On.
A stuck solenoid, wiring fault, or valve-body problem is usually the first place to look.
P0768
Powertrain
P0768 usually means shift Solenoid D Electrical.
A wiring, connector, fuse, or solenoid coil fault is usually the first place to look.
P0769
Powertrain
P0769 usually means shift Solenoid D Intermittent.
A loose connector, damaged harness, or heat-sensitive solenoid is usually the first place to look.
P0770
Powertrain
P0770 usually means shift Solenoid E Malfunction.
A solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0771
Powertrain
P0771 usually means shift Solenoid E Performance or Stuck Off.
A solenoid performance issue, wiring problem, or hydraulic fault is usually the first place to look.
P0772
Powertrain
P0772 usually means shift Solenoid E Stuck On.
A stuck solenoid, wiring fault, or valve-body problem is usually the first place to look.
P0773
Powertrain
P0773 usually means shift Solenoid E Electrical.
A wiring, connector, fuse, or solenoid coil fault is usually the first place to look.
P0774
Powertrain
P0774 usually means shift Solenoid E Intermittent.
A loose connector, damaged harness, or heat-sensitive solenoid is usually the first place to look.
P0780
Powertrain
P0780 usually means the transmission has detected a shift malfunction.
A fluid, solenoid, or control-side issue is the first place to look.
P0781
Powertrain
P0781 usually means 1-2 shift malfunction.
A shift-solenoid, hydraulic, or control issue is usually the first place to look.
P0782
Powertrain
P0782 usually means 2-3 shift malfunction.
A shift-solenoid, hydraulic, or control issue is usually the first place to look.
P0783
Powertrain
P0783 usually means 3-4 shift malfunction.
A shift-solenoid, hydraulic, or control issue is usually the first place to look.
P0784
Powertrain
P0784 usually means 4-5 shift malfunction.
A shift-solenoid, hydraulic, or control issue is usually the first place to look.
P0785
Powertrain
P0785 usually means shift/timing solenoid malfunction.
A solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0786
Powertrain
P0786 usually means shift/timing solenoid range or performance.
A timing solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0787
Powertrain
P0787 usually means shift/timing solenoid low.
A timing solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0788
Powertrain
P0788 usually means shift/timing solenoid high.
A timing solenoid, wiring, or valve-body hydraulic issue is usually the first place to look.
P0789
Powertrain
P0789 usually means shift/timing solenoid intermittent.
A loose connector, damaged harness, or heat-sensitive solenoid is usually the first place to look.
P0790
Powertrain
P0790 usually means normal/Performance Switch Circuit malfunction.
A switch, wiring, or transmission control issue is usually the first place to look.
P0801
Powertrain
P0801 usually means reverse inhibit control circuit malfunction.
A switch, wiring, or transmission control issue is usually the first place to look.
P0803
Powertrain
P0803 usually means 1-4 upshift (skip shift) solenoid control circuit malfunction.
A solenoid, wiring, or control-side issue is usually the first place to look.