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Low engine performance, engine does not start

Symptom: Low engine performance, engine does not start

Low engine performance, engine does not start

Fault symptoms



Low engine performance, engine does not start

Conditions

The following diagnostic trouble codes may arise: P0402 or P0403, P2279

Diagnostic procedure




1. Check the function of the EGR valve as follows:

Remove the upper engine cover and insulation and check the function of the EGR valve by activating it with Tech 2. When activating the valve, the sound of the engine changes, or the engine stalls.

If no reaction is achieved, remove the EGR valve and activate it when it is hanging loose. Check that it closes fully.

Fit an EGR valve from another car (that is not faulty) in the defective car in order to ascertain whether the fault remains.

2. Check the vacuum system in accordance with Lit CHECK ENGINE lamp and engine in Limp home Point 6.

3. Check/test pressurise the charge air system: See Lit CHECK ENGINE lamp and engine in Limp home Points 7-26.