Powertrain
generic / SAE
P226B
Turbocharger/Supercharger A Boost Pressure Too High - Mechanical
Boost pressure on turbo A exceeds the upper threshold and the cause is mechanical (wastegate stuck closed, VGT vanes stuck closed) rather than electrical drive fault.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 6B
Possible causes
- Wastegate or VGT stuck closed high
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
- Component: wastegate
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012