Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 74
Possible causes
- Open in sensor signal, supply or ground high
- Connector corroded by underhood moisture medium
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–400 €
- Estimated time: 0.6–1.6 h
- Component: turbo inlet pressure sensor b
- Component: turbocharger b
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012