How to Troubleshoot the Engine Malfunction Light?

[EmersynAnn]

You can start and turn off the vehicle three times in a row, or disconnect the negative terminal of the engine battery, wait for 30 seconds, and then reconnect it. This can usually resolve the issue. Relevant details are as follows: 1. Source of the engine malfunction signal: The engine malfunction signal is issued by the ECU (Engine Control Unit), which controls all electronic devices of the engine, such as the electronic throttle, fuel injector, alternator, fuel pump, etc., covering various systems including intake, exhaust, fuel, ignition, and timing. 2. Reasons for the engine malfunction light: There are multiple reasons why the engine malfunction light may illuminate, including sensor-related issues such as the coolant temperature sensor, crankshaft sensor, oxygen sensor, etc., as well as other problems like spark plug failure, ignition coil failure, fuel pump failure, or fuel line blockage that can trigger the light.