Malfunctions Displayed By Warning Lights

Malfunction Indicator Lamp (MIL), function

If emission-influencing malfunctions are recognized by the TCM, the Malfunction Indicator Lamp (MIL) will be switched on.





Location of the MIL: Integrated in speedometer.

Note: When the MIL is switched on, it will either blink or light continuously. In either case, the DTC memory for the TCM must be checked.

- MIL flashing: there is a malfunction that could damage the Three Way Catalytic Converter (TWC). In this case drive only with reduced power.
- MIL continuously on: there is a malfunction that degrades emissions. Check DTC memory of the Engine Control Module (ECM) or the TCM.
- If there is a driveability problem (customer complaint) and the MIL is not on, check the MIL function since malfunctions that do not immediately switch on the MIL can be stored.

MIL function check:
- Switch on ignition: MIL must come on.
If the MIL does not come on when the ignition is switched on (with the engine not running) Refer to Check Diagnostic Trouble Codes, and if necessary, check wiring and replace lamp.
- Start engine and let idle. The MIL must switch off after a few seconds.
If the MIL does not switch off after the engine was started, check DTC memory.

Conditions for recognizing a driving cycle (dcy)
- A Driving Cycle (dcy) is considered complete when the ignition is switched on one time, the engine is started, the engine start is recognized by the control module, and the ignition is switched off again.