OBD-II code · Powertrain (generic, extended)
P2374 Turbocharger Inlet Pressure Sensor B Circuit
The pressure sensor at the inlet of the second turbocharger (B) - on twin-turbo or sequential-turbo systems - is reporting a circuit fault. The ECU cannot determine inlet pressure and falls back to a substitute value, which limits boost control accuracy on this stage.
Is it safe to drive with P2374?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in sensor signal, supply or ground
- PossibleConnector corroded by underhood moisture
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–1.6 h
- Emissions test
- Likely to fail
- Parts involved
- Turbo Inlet Pressure Sensor B, Turbocharger B
Related codes
- P2371Fuel Volume Regulator B Control Circuit Performance
- P2372Fuel Volume Regulator B Control Circuit Low
- P2373Fuel Volume Regulator B Control Circuit High
- P2375Turbocharger Inlet Pressure Sensor B Circuit Range or Performance
- P2376Turbocharger Inlet Pressure Sensor B Circuit Low
- P2377Turbocharger Inlet Pressure Sensor B Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.