Fault-Tracing Information

Condition(s)
- diagnostic trouble codes (DTCs) in Motronic 4.4 absent.
- diagnostic trouble codes in AW 30-40/43 transmission control module (TCM) absent.
- engine at normal operating temperature.
- the fault is permanent.

Possible source(s)
- defective/damaged spark plugs.
- moisture in spark plug wells.
- resistance mass air flow (MAF) sensor.
- start fault-tracing. Proceed to: Checking Mass Air Flow Sensor Connector.