Can you keep driving?
Can you keep driving?
Stop driving if any of these apply
- !The vehicle suddenly runs much worse, loses power sharply, or the check-engine light starts flashing.
- !There is a strong smell, smoke, overheating, or any symptom that suggests a real-time safety problem rather than a stored code alone.
What to check first
Step-by-step checks
- 1
Safety first
Let the engine cool before touching turbo, exhaust, or charge-air parts
- 2
Free - no tools
Inspect the solenoid connector and wiring for heat damage, corrosion, or a pin that has backed out
- 3
Basic tool needed
Check whether the fault appears with underboost symptoms or limp mode
- 4
Basic tool needed
Look for a vacuum leak or control hose problem that may be forcing the ECU to keep the circuit in a low state
- 5
Basic tool needed
If scan data is available, verify whether the commanded state matches what the solenoid is doing
- 6
Basic tool needed
Check for blown fuses or a damaged power feed before replacing the valve
If the code returns
- -If the circuit is shorted, fix the wiring first and then retest the solenoid.
- -If the solenoid is electrically okay but still behaves weakly, replacement is more likely.
- -If the boost response is also low, check the vacuum side and actuator movement together.
Background
What this code means
P0245 is a generic OBD-II code for a low-input boost control solenoid circuit.
The ECU is seeing a signal that is lower than it expects, which can happen because the circuit is shorted, the solenoid is drawing too much current, or the control side is simply not responding correctly.
Diagnosis
Common causes
Short-to-ground in the control circuit
A wiring fault can pull the signal low and trigger the code.
Weak boost control solenoid
The solenoid may be drawing too much current or not switching correctly.
Connector damage or corrosion
Poor terminal fit can create a low-reading electrical fault.
Vacuum system fault affecting control behavior
A leak can make the ECU see a control problem even when the solenoid is partly healthy.
Avoid these mistakes
What not to do
- xDo not replace the turbo first if the circuit fault is obvious.
- xDo not ignore a blown fuse or chafed wire just because the solenoid is the named part.
Parts
Parts that may need replacing
See also
Related OBD codes
Source notes
Generic OBD-II (SAE J1979 / ISO 15031-5). P0245 was seeded from dtcdb and then expanded around low boost control solenoid circuit faults, especially shorts-to-ground and power-feed problems.
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