Powertrain
generic / SAE
P25FC
Turbocharger/Supercharger Bypass Valve C - Mechanical
The third bypass valve is mechanically jammed. Solenoid is energised correctly but the valve flap or disc does not move as expected.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / FC
Possible causes
- Carbon buildup blocks the valve flap high
- Actuator linkage seized by corrosion 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: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1.5–5 h
- Component: bypass valve c
- Component: actuator linkage
- MIL / check engine light
Sources
References
sae:J2012