Powertrain
generic / SAE
P02CA
Turbocharger/Supercharger B Overboost Condition
Boost pressure on the secondary turbocharger/supercharger (B) on a sequential or twin-charged setup is above the upper threshold. Wastegate stuck closed, VGT vanes stuck, or boost pressure sensor reads high.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / CA
Possible causes
- Wastegate stuck closed high
- VGT vanes stuck closed 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: 200–3000 €
- Estimated time: 1.5–8 h
- Component: turbocharger b
- Component: wastegate b
- Component: boost pressure sensor b
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012