Powertrain
generic / SAE
P0049
Turbocharger/Supercharger A Turbine Overspeed
The turbocharger A turbine speed exceeded its safe limit. Risk of bearing damage and shaft fracture. Often caused by a stuck-closed wastegate or boost control fault.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 49
Possible causes
- Wastegate stuck closed high
- Boost control loop fault 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: 300–3000 €
- Estimated time: 2–10 h
- Component: turbocharger
- Component: wastegate
- Component: turbine speed sensor
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012