P0236 code definition
Turbocharger Boost Sensor A Circuit Range/Performance
What the P0236 code means
P0236 is an OBD-II generic code that is triggered when the Engine Control Module (ECM) detects the intake boost pressure sensor A input circuit range or performance is out of specifications when compared to the manifold pressure sensor (MAP) or the barometric pressure sensor (BARO) at idle and with the key on, engine off, before starting.
What causes the P0236 code?
The turbo boost pressure sensor does not correlate the same reading with the MAP or BARO sensors at engine idle or when the key is on and the engine is off.
The turbo boost pressure sensor A is contaminated or clogged with debris or carbon deposits
The turbo boost pressure sensor A is slow to respond to changing pressure due to deterioration with age
What are the symptoms of the P0236 code?
The Check Engine Light will be illuminated and the code set
The engine turbo boost may be turned off by the ECM and the engine will lack power
The engine may lack some power during acceleration if the boost sensor is failing to register the correct amount of boost pressure
How does a mechanic diagnose the P0236 code?
Scans codes and documents the freeze frame data in order to verify the problem
Clears the codes to verify whether the concern comes back
Checks the operation of the boost pressure sensor compared to the MAP sensor
Checks the turbo boost sensor for blockage of the sensor port, or boost sensor hose or line
Checks the turbo boost sensor connector for loose or corroded pins
Common mistakes when diagnosing the P0236 code?
Follow these simple guidelines to prevent misdiagnosis:
- Check the boost pressure sensor hose for obstructions or kinks
- Verify the connections to the sensor are secure and not leaking, kinked or cracked
How serious is the P0236 code?
- The boost pressure in the intake can give you a lot of power. If the turbo boost sensor is out of range or having performance problems, then the ECM may disable the turbo boost on some vehicles that only have the one sensor; this could cause the vehicle to have a lack of power on acceleration.
What repairs can fix the P0236 code?
Replacing the boost sensor if it is not giving the correct input pressure reading to the ECM
Repairing or replacing hoses and connections to the turbo boost sensor that have kinks or blockage of the lines
Additional comments for consideration regarding the P0236 code
Code P0236 is triggered by the intake boost sensor indicating a range or performance problem that the ECM determines is out of known specifications. The most common failure is boost sensor slow response due to performance issues.
Need help with a P0236 code?
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