P2376Turbocharger/Supercharger Inlet Pressure Sensor B Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2376 is set when the output voltage of compressor inlet pressure sensor B drops below its lower limit. No maker documents the B code publicly; GM's A version P012C on the supercharged LT4 gives an idea of the scale. There the threshold is 3 % of the 5 V reference, equal to roughly 6 kPa – a value no intake can reach in reality. The check runs continuously with one sample every 12.5 ms and fails once 320 of 400 samples are below the limit, so a steady fault is caught within a five-second window; the code is Type B. Typical reasons are a signal lead touching ground, a broken 5 V feed or a dead sensor. The ECM falls back on a substitute value and may cap boost on that compressor.
- What you may notice
- Check engine light on
- Live data show an inlet pressure far below ambient
- Possible boost limitation
- Likely causes
- LikelySignal wire of sensor B shorted to ground
- Possible5 V reference to sensor B open
- PossibleSensor B failed
- 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 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.