P0234 Turbocharger/Supercharger Overboost Condition
Boost pressure exceeded the allowed limit.
Common causes
- Sticking wastegate or VNT vanes
- Faulty boost control solenoid
- Faulty boost pressure sensor
- Cracked vacuum line to the actuator
Symptoms
- Check engine light
- Limp mode
- Surging power
What to check
- Check actuator movement
- Inspect vacuum lines
- Compare desired and actual boost
Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0234, follow the service information for that make and model.