What are the reasons for the engine fault warning light to illuminate?

[LeKaleb]

The reasons for the engine fault warning light to illuminate are: 1. Poor combustion state; 2. Poor fuel quality; 3. Dirty engine cylinder interior with carbon deposits. The engine fault signal on the car dashboard is issued by the ECU (Engine Control Unit), which controls all electronic devices of the entire engine, such as the electronic throttle, fuel injectors, alternator, fuel pump, etc., covering various systems including intake, exhaust, fuel, ignition, and timing. When the engine fault light comes on, the owner should 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.