What does engine emission fault mean?

[LaEmma]

An engine emission control system fault indicates that there is an issue with components in the vehicle's engine. Here are detailed explanations: 1. The engine warning light illuminates to alert the owner to check the engine components. The engine emission system fault light, commonly referred to as the engine check light, will turn on the indicator on the dashboard when the ECU detects and reads a fault code. 2. When the engine fault indicator light is on, the car can still be driven, but it is best to promptly visit the nearest repair shop to have technicians inspect the engine and related components, identify the faulty part, and carry out repairs. 3. Alternatively, the owner can repeatedly start and turn off the car three times in a row; then disconnect the negative terminal of the car battery, wait for 30 seconds, and reconnect it to check if it is a false engine fault issue. 4. The causes of engine exhaust system faults could be poor-quality gasoline leading to catalytic converter poisoning, or a damaged oxygen sensor in the catalytic system. This can result in reduced driving power, increased fuel consumption, and more severe exhaust pollution. Therefore, it is advisable for the owner to seek repairs as soon as an engine fault occurs.