Can you keep driving?
Can you keep driving?
Stop driving if any of these apply
- !The engine starts stalling, losing power sharply, or refusing to start reliably.
- !The check-engine light flashes or the vehicle runs extremely rough after the code appears.
What to check first
Step-by-step checks
- 1
Free - no tools
Check the sensor connector and harness for looseness, corrosion, or heat damage
- 2
Free - no tools
Compare the live fuel temperature reading with the actual engine and ambient conditions
- 3
Basic tool needed
Inspect whether the code appeared after fuel-system service or after a long hot drive
- 4
Basic tool needed
If the vehicle is flex-fuel, check whether other related codes are present too
- 5
Basic tool needed
If the reading changes when the harness is moved, wiring is more likely than the sensor body alone
If the code returns
- -If the value is unrealistically hot on a cool engine, an open circuit becomes more likely.
- -If the code returns after replacement, check the connector pins and circuit continuity again.
- -If the reading is only off when hot, heat-related sensor drift becomes a stronger suspect.
Background
What this code means
P0183 is a generic OBD-II code for a high-input fuel temperature sensor fault.
That usually means the ECU is seeing a signal that suggests the fuel is hotter than expected, which can come from an open circuit, sensor drift, or connector damage.
Diagnosis
Common causes
Open fuel temperature circuit
A break in the signal path can make the value read too hot.
Failed fuel temperature sensor
The sensor may drift high internally or fail open.
Connector or pin issue
A loose or damaged connector can create a false-high reading.
Heat or harness damage
A harness that passes too close to hot components can fail over time.
Avoid these mistakes
What not to do
- xDo not replace the sensor first if there is obvious wiring, connector, or fuel contamination damage.
- xDo not assume a flex-fuel or fuel-temperature code is safe to ignore if hard starting or stalling is already happening.
Parts
Parts that may need replacing
See also
Related OBD codes
P0180
P0180 usually means the fuel temperature sensor circuit has a malfunction.
P0181
P0181 usually means the fuel temperature sensor is out of range or performance.
P0182
P0182 usually means the fuel temperature sensor is reading too low.
P0184
P0184 usually means the fuel temperature sensor is intermittent or erratic.
Source notes
Generic OBD-II (SAE J1979 / ISO 15031-5). P0183 was expanded around common high-input fuel-temperature faults, especially open circuits, sensor drift, and heat damage.
This guide is written as a generic multi-make reference, so bulletin history, sensor locations, and repair order can still change by manufacturer and engine family.
This is generic OBD-II guidance and should not override vehicle-specific service information. Exact diagnosis and repair steps vary by make, engine family, and model year.
Last reviewed: 2026-04-10
Reference: Open reference