p0234
Moderate
Citroen · Sedans & Hatchbacks
Turbocharger Overboost Condition
Quick Answer
Error code P0234 on your Citroen Sedans & Hatchbacks means: Turbocharger Overboost Condition. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Check wastegate actuator for free movement
2
Test boost pressure sensor signal
3
Verify boost control solenoid operation
4
Monitor turbo boost pressure live
5
Inspect turbocharger compressor wheel
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Wastegate actuator
Boost pressure sensor
Boost control solenoid
Turbocharger assembly
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