Malfunction Indicator Lamp (MIL), Significance

Malfunction Indicator Lamp (MIL) in instrument cluster, Significance

Installation position of exhaust MIL

Version A







Version B







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

NOTE:
The Malfunction Indicator Lamp (MIL) can blink or remain lit continuously. DTC memory must be checked in each case, diagnostic mode 3: Check DTC memory.
- Blinking: There is a malfunction that causes damage to the catalytic converter in this driving condition. In this case, vehicle must only be driven at reduced power.
- Continuously lit: There is a malfunction that causes increased emissions. Check DTC memory for Motronic control module.
- DTC memory must still be checked if there are drivability 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.