P2374Turbocharger/Supercharger Inlet Pressure Sensor B Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2374 covers any wiring or sensor-side failure of a second pressure sensor mounted upstream of a compressor. Where the letter B belongs is the manufacturer's choice; on parallel twin-turbo V engines, where each turbocharger serves one cylinder bank, a second inlet sensor for the other compressor is the obvious candidate. No manufacturer documents P2374 publicly – GM's supercharged V8 (P012B–P012D) and Ford's 2023 diesels (P012A) only use A codes. Ford's digital SENT sensor shows how such a general code can arise: it is set when the sensor itself signals an internal error or its data stay beyond a threshold for 5 s, while a lost data link counts separately as a U code. The ECM then substitutes a value, usually close to ambient pressure, and may limit boost on that side.
- What you may notice
- Check engine light on
- Reduced boost or power
- Likely causes
- LikelyConnector or wire of sensor B open, corroded or shorted
- PossibleSensor B reports an internal error
- RareSensor supply voltage missing
- 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.