What is the reason for the engine malfunction light coming on and then turning off?
2 Answers
The reason for the engine malfunction light coming on and then turning off is that the internal temperature of the engine is low, and the gasoline atomization is poor. The engine malfunction light indicates the following: 1. It comes on and then turns off automatically: normal situation; 2. It stays on: indicates a mechanical fault in the vehicle's engine, requiring repair. Solutions for the engine malfunction light coming on: 1. Replace the oxygen sensor; 2. Replace the three-way catalytic converter; 3. Tighten or replace the fuel tank cap; 4. Replace the thermostat; 5. Replace the ignition coil; 6. Replace the air flow sensor; 7. Perform regular maintenance according to the time cycle specified in the vehicle maintenance card.
Last time during maintenance, the technician mentioned this phenomenon to me. The engine warning light occasionally comes on and then goes off, most likely due to fuel quality issues. I remember the light came on right after I filled up with cheap gas, but it stopped appearing after I switched back to regular gas stations. It's like an upset stomach - the computer detects abnormal combustion and triggers an alert. But the computer is quite smart; as long as the next few tanks of fuel are fine, it will quietly cancel the fault code. Another common cause is sensor interference from moisture, just like how a phone acts up when wet but works again after drying. Of course, if the light keeps flashing repeatedly accompanied by noticeable shaking, it's best to get the spark plugs or fuel injectors checked at the shop - safety comes first.
