Boost pressure exceeds the expected level. Applies only to forced-induction variants.
SYMPTOMS
- Check-engine light
- Reduced power / limp mode
LIKELY CAUSES
- Stuck wastegate
- Faulty boost control
- Boost sensor fault
DIAGNOSIS STEPS
- Check wastegate/actuator operation
- Compare commanded vs actual boost
- Inspect boost control valve
RELATED PARTS
- Turbocharger
- Wastegate actuator