What to Do When the Engine Exhaust System Warning Light Comes On?
2 Answers
Engine Exhaust System Warning 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; 2. If the light comes on while driving, immediately reduce speed and drive to the nearest service station for inspection. The reasons for the engine exhaust system warning light coming on are: 1. Impact during driving, tampering with a certain connector on the engine, or temporary signal interruption in the ECU; 2. Poor combustion of the air-fuel mixture; 3. Irregular maintenance or poor driving habits; 4. Not using the required fuel grade.
Last time I encountered the exhaust warning light was on the highway, so I quickly pulled into a service area to check. First, I observed whether there was any abnormal smoke from the exhaust pipe and sniffed for any burnt smell. Then, I tightened the fuel cap myself—sometimes the light comes on simply because the cap wasn’t secured properly. After restarting, the light remained on, so I drove straight to the repair shop. The technician said it might be an issue with the oxygen sensor and replacing it would solve the problem. There are many reasons for this light to come on: a faulty catalytic converter, sensor malfunction, or exhaust leaks could all be the culprit. Ignoring it for too long might lead to higher fuel consumption or even engine stalling. My advice to drivers is not to panic when this happens—immediately reduce speed, check for unusual exhaust noises, and schedule a professional inspection as soon as possible.
