What are the reasons for the engine fault light on the vehicle dashboard?
3 Answers
Reasons for the engine fault light on the vehicle dashboard: 1. Poor combustion state; 2. Engine knocking; 3. Poor fuel quality; 4. Unclean engine cylinder interior with accumulated carbon deposits; 5. The computer cannot obtain engine data. After the engine fault light comes on, there are always some abnormal conditions present. If not resolved in time, it is usually accompanied by the following issues: 1. Deterioration of vehicle exhaust emissions, polluting the environment; 2. Engine oil burning; 3. Increased vehicle fuel consumption, wasting petroleum resources; 4. Increased combustion chamber temperature and accelerated wear, which may lead to early engine damage; 5. Increased engine noise, affecting driving and riding comfort.
That glowing yellow check engine light is terrifying! Last time I encountered this, it was a faulty oxygen sensor. The mechanic said this component monitors exhaust gas concentration, and when it fails, it misleads the ECU into improper fuel injection. Actually, there are quite a few common causes: poor fuel quality leading to incomplete combustion (most likely to trigger this right after refueling); sensors acting up—knock sensors or mass airflow sensors might throw errors; the worst scenarios are misfiring spark plugs or a clogged catalytic converter, which can get expensive if ignored. Sometimes it’s just a silly mistake like a loose gas cap, but never attempt to reset it by yanking fuses blindly—reading the trouble codes is the only reliable fix.
After driving for ten years, I've figured out a thing or two. There are basically two types of engine warning lights: life-threatening and false alarms. Life-threatening issues include oil starvation causing cylinder scoring or timing chain skipping teeth - your car will shake like it's tap dancing. False alarms could be from bad fuel quality or rodents chewing sensor connectors. Last time my warning light came on with sluggish acceleration, diagnostics showed an exhaust manifold leak. I recommend veteran drivers keep an OBD scanner handy - for fifty bucks you can read basic trouble codes, much better than getting fleeced at the dealership. By the way, if you notice obvious jerking during braking, there's an 80% chance your ignition coils need replacement.
