P2375Turbocharger/Supercharger Inlet Pressure Sensor B Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- With P2375 the signal of compressor inlet pressure sensor B is electrically valid but implausible – stuck, offset or out of step with the other pressure values. No manufacturer publishes the B code; GM's 2018 table for the supercharged LT4 V8 describes the A counterpart P012B in detail. After a long enough engine-off period all induction pressures have equalised, so the reading must lie in the normal atmospheric range; with the engine turning between 400 and 6,200 rpm it is weighed against models of airflow, manifold pressure and throttle, where single model errors above 30 kPa count. GM rates the fault Type B, two trips. On a twin-turbo engine a clogged filter on one side or a leaking duct to compressor B can trigger it as readily as a drifting sensor.
- What you may notice
- Check engine light after two trips
- Uneven boost between the two turbochargers
- Reduced power
- Likely causes
- LikelySensor B drifted or stuck
- PossibleAir filter on the side of compressor B clogged
- PossibleLeaking or collapsed duct ahead of compressor B
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.