What Causes the Exhaust System Warning Light to Illuminate?

1 Answers
LaIsabella
07/30/25 10:40am
Here are the reasons and solutions for the illumination of the engine exhaust system warning light: 1. Oxygen sensor failure: The illumination of the engine exhaust system warning light is mostly caused by damage to the oxygen sensor in the three-way catalytic converter system or poisoning of the catalytic converter due to poor fuel quality in the domestic market. If this light comes on while driving, immediately reduce speed and proceed to the nearest service station for inspection. 2. Fuel pump or ignition system failure: If the vehicle stalls and cannot restart after the warning light comes on, this is usually due to a fuel pump or ignition system malfunction. If the vehicle can still be driven but exhibits severe shaking, lack of acceleration power, or similar symptoms, it is advisable to stop driving. This not only prevents further damage to the engine but also ensures personal safety.
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