P0234
Turbocharger/Supercharger A Overboost Condition
1999-2000 BMW 323i E46 2.5L I6 🇨🇦
Critical SeverityPowertrain
Description
The boost pressure has exceeded the maximum allowed value.
Symptoms
- Check Engine Light
- Excessive power then limp mode
- Whining turbo noise
- Possible engine damage
Common Causes
- Wastegate stuck closed
- Boost control solenoid failure
- Boost pressure sensor fault
- Blocked wastegate actuator hose
Diagnostic Steps
- Check wastegate operation
- Test boost control solenoid
- Monitor boost pressure
- Inspect vacuum lines to wastegate
Repair Notes
Address immediately to prevent engine damage. Check wastegate and boost control.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0234 on Other Vehicles
Common Questions
What does code P0234 mean on a 1999-2000 BMW 323i E46?
P0234 stands for "Turbocharger/Supercharger A Overboost Condition". The boost pressure has exceeded the maximum allowed value.
What are the symptoms of P0234 on a BMW 323i E46?
Common symptoms of P0234 include: Check Engine Light, Excessive power then limp mode, Whining turbo noise, Possible engine damage.
What causes P0234 on a 1999-2000 BMW 323i E46?
Common causes of P0234 include: Wastegate stuck closed, Boost control solenoid failure, Boost pressure sensor fault, Blocked wastegate actuator hose.