Function of Malfunction Indicator Lamp (MIL) -K83-

WARNING: This page is about a different car, the 2003 Audi RS 6. However, it is still accessible from the selected car via links, so may be relevant.

If the engine control module detects faults detrimental to emissions, such faults are indicated by activation of the Malfunction Indicator Lamp (MIL).

The engine control module activates the MIL after switching on the ignition. Shortly after the engine is started, the MIL goes out if the engine control module has not recognized any faults detrimental to the emissions and there is also no problem with activation of the lamp by the engine control module.

The engine control module activates the MIL if faults detrimental to emissions are detected while the engine is running. At the same time, an entry is made in the engine control module DTC memory.

The MIL may flash or light constantly. Fault memory is always to be interrogated. See FAULT MEMORY, INTERROGATING AND ERASING .