What Does It Mean When the Engine Emission System Warning Light Comes On?

[PatrickFitz]

When the engine emission system warning light comes on, it indicates a fault in the emission system. Here are the specific details about the engine exhaust system warning light: 1. False Alarm Handling: 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 performing the above steps, check if the engine warning light on the dashboard is still on. This method only applies to false alarms in the engine system. 2. Cause of the Fault: The engine exhaust system warning light often comes on due to poor fuel quality in the country. It may be caused by a damaged oxygen sensor in the three-way catalytic system or poisoning of the catalytic converter. If the light comes on while driving, immediately reduce speed and drive to the nearest service station for inspection. 3. Solution: If the warning light comes on and the vehicle cannot start after being turned off, this is usually due to a fuel pump or ignition system failure—call for a tow truck immediately. If the vehicle can still be driven but exhibits severe shaking, loss of acceleration power, or other symptoms, take action to prevent further engine damage.