Why Doesn't the Engine Self-Check Malfunction Light Illuminate?

[DeAlex]

Engine self-check malfunction light not illuminating is a normal phenomenon. When the vehicle is not started, the malfunction indicator light will always be on, and it will automatically turn off within 3-5 seconds after starting. Below are relevant explanations: 1. Engine self-check light: The engine self-check light, also known as the engine malfunction light, illuminates when the engine encounters issues. These malfunctions generate a series of codes, and after the ECU reads the fault codes, they appear as indicator lights on the dashboard. If the engine self-check light remains on after the vehicle has started, it indicates there may be an engine malfunction. 2. Excessive carbon buildup: If the malfunction light stays on continuously while driving, it is usually due to excessive carbon buildup in the throttle or inside the engine.