P1555critical severityPowertrain
Charge Pressure Upper Limit Exceeded
on 2012 Mini Clubman 2.0L I4 Turbo · FWD
What this code means
The DME detected that the turbocharger boost pressure has exceeded the maximum allowed limit. This is an overboost condition that can cause severe engine damage if not addressed immediately.
Symptoms
- Check Engine Light
- Reduced power mode
- Overboost felt as sudden power surge
- Engine may shut down
- Possible engine knock
Common causes
- Wastegate stuck closed
- Boost control solenoid failure
- Wastegate actuator diaphragm leak
- Charge pipe leak causing incorrect sensor reading
- Boost pressure sensor fault
Diagnostic steps
- Monitor actual vs target boost pressure
- Test wastegate operation manually
- Check boost control solenoid
- Inspect charge pipes for leaks
- Test boost pressure sensor accuracy
Repair notes
Immediately repair the overboost condition to prevent engine damage; check wastegate and boost control solenoid.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1