How to Troubleshoot When the Engine Fault Light Comes On?

3 Answers
CollinAnn
07/24/25 9:45pm
When the engine fault light comes on, it indicates the following situations: a yellow symbol light indicates a fault in the engine; a red symbol light indicates a serious fault in the engine. Here is more information about the engine fault light: 1. Elimination method: Simply remove the fuse. 2. Solutions for when the engine fault light comes on: (1) Clean the engine: Once the engine fault light comes on, the owner should promptly clean the carbon deposits in the engine. (2) Improve fuel quality. (3) Use higher-grade gasoline: After cleaning the engine, the owner can choose to use 95 or 97 octane gasoline.
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GemmaAnn
08/10/25 9:52am
Last time my car's engine warning light suddenly came on, it really freaked me out, so I quickly pulled over to check. First, I tried tightening the fuel cap—sometimes a loose fuel cap can trigger the alarm. If the light was still on, I would drive the car to a nearby repair shop to read the fault codes. In most cases, it's just a dirty sensor or a poor connection, and cleaning or reconnecting the plug will fix it. If the fault code shows serious issues like a knock sensor or a failed catalytic converter, then it needs proper repairs. Never drive long distances with the warning light on, as it can turn a minor issue into a major problem.
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Marie
09/26/25 5:42am
I've dealt with the engine malfunction light coming on several times. First, find a place with an OBD scanner to read the fault codes - for example, Volkswagen cars often show P0171 which usually indicates excessive carbon buildup. Don't try to save money by using low-quality fuel when refueling, and timely oil changes are crucial. If you notice power loss combined with severe shaking while driving, stop immediately and call a tow truck. A friend of mine kept driving despite these symptoms and ended up with cylinder scoring, costing over 8,000 yuan for major repairs.
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