p0234
Moderate
Alfa Romeo · Sedans & Sports Cars
Turbo/Supercharger Overboost Condition
Quick Answer
Error code P0234 on your Alfa Romeo Sedans & Sports Cars means: Turbo/Supercharger Overboost Condition. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Verify boost pressure sensor accuracy
2
Check wastegate valve for sticking
3
Test boost control solenoid
4
Inspect boost pressure hoses
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
Boost pressure sensor
Wastegate valve
Solenoid
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