P0234
Turbocharger/Supercharger A Overboost Condition
P0234 is an OBD-II diagnostic trouble code meaning: Turbocharger/Supercharger A Overboost Condition. Common causes: turbine control solenoid malfunction, wastegate jammed. Estimated repair cost: $56–278.
Symptoms
- Reduced engine power
- Jerking during acceleration
- Switching to limp mode
- Black smoke from the exhaust pipe (when the mixture is over-rich)
Causes
- Turbine control solenoid malfunction
- Wastegate jammed
- Leaks in boost pipes
- Mechanical damage to the turbocharger
- Errors in ECU software
- Contamination or coking of the crankcase ventilation system
How to Fix
- Check the integrity of the pipes and intercooler for leaks
- Check the functionality of the bypass valve
- Test boost control solenoid
- Check the mobility of the turbine blades (if VGT)
- Scan the ECU for additional errors
- If necessary, replace faulty components
Related codes
Error P0234 by Vehicle Brand
FAQ
What does the P0234 code mean?
P0234 is an OBD-II diagnostic trouble code that indicates: Turbocharger/Supercharger A Overboost Condition
What causes a P0234 error code?
The most common causes of P0234 include: Turbine control solenoid malfunction; Wastegate jammed; Leaks in boost pipes; Mechanical damage to the turbocharger.
How do I fix a P0234 diagnostic trouble code?
To fix P0234: Check the integrity of the pipes and intercooler for leaks. Check the functionality of the bypass valve. Test boost control solenoid. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0234?
Limited driving only, diagnose soon
How much does it cost to fix P0234?
The estimated repair cost for P0234 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat