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ME9 / P0234 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Malfunction Indicator Lamp

  P0234 00


Turbocharger Overboost Detected

Fault symptom

Malfunction Indicator Lamp

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Drive the car in 3rd gear, 1900 rpm. Full gas acceleration up to 3800 rpm.

Fault criteria:

Boost pressure 0.5 kPa higher than requested.

OK report:

Drive the car in 3rd gear, even acceleration at 1900 rpm. Then full gas acceleration (pedal not depressed 100%) up to 5000 rpm.

Diagnostic help

Diagnosis regards:

Turbo system fault causing high boost pressure.

Functions in the diagnostic tool related to the fault:

Test value:
Charge Air Absolute Pressure
Atmosphere Absoslute Pressure
Charge Air Control Valve

Activation:
Charge Air Control Valve
(See also description of readings/activations in diagnostic tool)