What Causes the Engine Light to Illuminate?
2 Answers
The reasons for the engine light to illuminate are: 1. Poor gasoline quality can lead to incomplete combustion of the air-fuel mixture in the cylinder, causing pollution and easily forming carbon deposits; 2. Carbon buildup in the intake tract or on the piston crown can result in poor atomization, leading to incomplete combustion; 3. Excessive mileage can weaken the spark plug's performance, triggering the light; 4. Excessive carbon deposits or ignition difficulties may cause the ignition coil to fail due to reverse breakdown, resulting in poor ignition and incomplete combustion. If there are no obvious faults, driving cautiously at low speeds is generally acceptable. The issue could be minor or a false alarm. However, if the engine exhibits severe symptoms like abnormal noises, intense shaking, or smoke, avoid driving and contact a repair shop for assistance immediately.
Last time I got my car fixed, the old mechanic said the engine light is like the car shouting 'I'm not feeling well!' Most likely it's the exhaust system protesting—maybe the oxygen sensor is lazy from carbon buildup and not working, or the catalytic converter is clogged and can't breathe. It could also be old spark plugs misfiring, or something silly like the fuel cap not being tightened properly. The most reliable way is to connect an OBD scanner with your phone to read the trouble codes. Never keep driving with that little yellow light on—my neighbor once forced it for half an hour and ended up with an 8,000+ RMB repair bill. Better hurry to a repair shop to plug in the diagnostic computer and figure out whether it's a misfire or the fuel pump acting up.
