Powertrain
generic / SAE
P22C9
Turbocharger Compressor Outlet Valve Stuck Closed
Compressor outlet valve mechanically stuck closed — pressure cannot be released on throttle close, causing audible compressor surge ("flutter") and stress on the turbo bearings.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / C9
Possible causes
- Valve seized high
- Carbon or debris buildup preventing free movement low
- Component wear with age - mechanical play low
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: 80–600 €
- Estimated time: 0.5–2.5 h
- Component: diverter valve
- Component: turbocharger
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012