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Too low an EGR flow

Symptom: Trouble code P0401 indicating a low EGR flow is set.

Too low an EGR flow

Fault symptom

Trouble code P0401 indicating a low EGR flow is set.

Criteria

Can occur at temperatures below +10°C.

CHECK ENGINE light comes on and the car goes into Limp Home.

Procedure




1. First check for an air leak. If so remedy this first.

2. If there is no air leak, connect Tech 2.

3. Go to menu Adjustment and select EGR.

4. Increase the value to +50 mg/c.

Note

Tech 2 will not show the new value.