What is the solution when the car engine emission fault light comes on?

[SanOlivia]

When the car engine emission fault light comes on, the solutions are: 1. 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. After completing the above steps, check if the engine fault light on the dashboard is still on; 2. If the fault light remains on and the vehicle cannot be started after turning it off, call for a tow truck; 3. The engine exhaust system fault light usually comes on due to damage to the oxygen sensor in the three-way catalytic system or poisoning of the three-way catalytic converter caused by poor fuel quality. If the light comes on while driving, immediately reduce speed and drive to the nearest service station for inspection and repair.