Powertrain
generic / SAE
P22D2
Turbocharger Turbine Inlet Valve Stuck Open
Turbine inlet valve mechanically stuck open — exhaust gas flow cannot be redirected, sequential charging fails.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / D2
Possible causes
- Valve seized open from carbon 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: hard
- DIY: shop recommended
- Estimated cost: 200–2000 €
- Estimated time: 1.5–5 h
- Component: turbine inlet valve
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012