Malfunction Indicator Lamp (MIL)

The Malfunction Indicator Lamp (MIL) lights up when malfunctions are recognized by the Engine Control Module (ECM).







Installation position of exhaust MIL


NOTE: The Malfunction Indicator Lamp (MIL) can blink or be lit continuously. DTC memory should be checked in both cases. Reading Diagnostic Trouble Codes


- Blinking: There is a malfunction that damages the catalytic converter in this driving condition. In this case, vehicle must only be driven at reduced power!
- Steady light: There is a malfunction that causes increased emissions. Check DTC memory for Motronic ECM or automatic transmission.
- DTC memory must still be checked if there are driveability problems or the customer has made a complaint but the MIL is not lit, because malfunctions can be stored without causing the MIL to light immediately.