What to Do When the Engine Emission Warning Light Comes On?

[VonLucy]

Here are the methods to handle when the engine emission warning light comes on: 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 performing the above steps, check if the engine warning light on the dashboard is still on. This method is only effective for false engine faults. 2. The illumination of the engine exhaust system warning light is mostly caused by damage to the oxygen sensor in the three-way catalytic system or poisoning of the three-way catalytic converter due to poor fuel quality in the country. If this light comes on while driving, immediately reduce speed and drive to the nearest service station for inspection. 3. If the warning light comes on and the vehicle cannot start after turning off, this is usually due to a fuel pump or ignition system failure. It is recommended to call for a tow truck directly. If the vehicle can still be driven but exhibits severe shaking, lack of acceleration power, and other symptoms, it is advisable to stop driving. This not only prevents further damage to the engine but also ensures the safety of the owner and others. Additional Information: Vehicles have warning lights, such as one resembling a faucet, commonly referred to as the engine fault light. This light usually comes on when the vehicle is powered on and goes off during actual startup. However, it may stay on due to vehicle issues. This light is commonly called the engine fault light, but it is actually the emission warning light. Normally, if this light does not go off, it means the vehicle's emissions exceed the standard and must be repaired.

[StRonan]

I've been driving for several years. Never ignore the emission light when it comes on—it's usually a signal of a fault in the engine's emission system, such as a bad oxygen sensor or a problem with the fuel system. The first time I encountered it, I was a bit nervous, but a friend suggested turning the engine off and restarting it first. If the light stays on, then it's time to visit a repair shop. You can read the OBD trouble codes to pinpoint the exact cause, which often saves time and money. Ignoring emission issues harms the environment by increasing harmful emissions and may also lead to higher fuel consumption or failing the annual inspection. It's best to get it checked as soon as possible to prevent minor issues from becoming major ones, especially if you frequently drive long distances. Avoid tampering with it yourself to prevent damage to other components—let a professional repair shop handle everything.