Lemans FWD L4-121 2.0L (1989)
Malfunction Indicator Lamp: Service and Repair
Bulb Test
- The check engine lamp will be illuminated when the ignition switch is placed in the ON position.
- When the engine is started, the light should turn OFF.
Code Set
- If the lamp remains ON for 10 seconds or constantly after the engine is started, the self diagnosis system has detected a problem and has stored a
code in the system Electronic Control Module (ECM).
Clearing Codes
- After diagnosis and repair, the ECM memory can be cleared of codes, by disconnecting battery ground cable for 10 seconds, with ignition switch
in the OFF position.