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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 symptom



Low engine performance, engine does not start

Criteria

The following diagnostic trouble codes may arise: P0400 5A, P2279 11 or P2279 12

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 the engine in Limp home. Point 6.

3. Check/pressure test the charge air system: see Lit CHECK ENGINE lamp and the engine in Limp home. Points 7-20.


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