p0234
Moderate
MINI · Hatchbacks & Crossovers
Turbocharger/Supercharger Overboost Condition
Quick Answer
Error code P0234 on your MINI Hatchbacks & Crossovers means: Turbocharger/Supercharger Overboost Condition. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Test boost pressure sensor accuracy
2
Inspect wastegate valve for stuck condition
3
Test boost control solenoid operation
4
Perform boost limit test
5
Verify ECM calibration and boost parameters
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
Boost control solenoid
Turbocharger service kit
Boost gauge
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