A
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
Applies to all models
960952952QF940955949949QF116
Likely Causes
  1. Faulty boost pressure sensor
  2. Wastegate valve stuck closed
  3. Boost control solenoid malfunction
  4. Engine control module calibration issue
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
Related Error Codes
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