Action in service

Secondary fault, rectify faults relating to the following components or functions:

• Mixture control.
• Fuel system.
• VANOS.
• Tank ventilation system.
• Ignition.
• Injectors.
• Crankshaft sensor.
• Camshaft sensor.
• Electromotive throttle controller.
• Hot film air mass meter.

Check exhaust system in the area of the oxygen sensor before catalytic converter for tightness.

Check air intake for tightness.

Check crankcase ventilation.

Check lines and plug connections between the following components:

• DME.
• Oxygen sensor before catalytic converter.
• Oxygen sensor after catalytic converter.

Replace oxygen sensor before catalytic converter.

Renew oxygen sensor after catalytic converter.