What are the reasons for the engine warning light to illuminate?
2 Answers
Reasons for the engine warning light to illuminate: 1. Fault in the fuel emission system, when the computer receives parameters from the oxygen sensor indicating that the exhaust emissions significantly exceed national legal standards, and the internal program cannot adjust to the standard range; 2. Poor combustion state; 3. Engine knocking, car lacks power, excessive engine noise, with obvious piston slap sounds; 4. Poor fuel quality, unclean engine cylinders, with accumulated carbon deposits; 5. False faults may also report fault codes, but the engine operates normally, possibly due to an operation that exceeded the computer's control range, resulting in the computer reporting a fault code.
The other day, the check engine light in my car suddenly came on. As an enthusiast who often works on my own car, I know there could be quite a few reasons behind it. The most common issue is sensor failure, like a faulty oxygen sensor, which can affect the air-fuel mixture. Fuel system problems are another possibility – an unstable fuel pump or fluctuating fuel pressure can trigger the light. Ignition system issues shouldn't be overlooked either, as worn spark plugs or damaged ignition coils can cause the warning light to illuminate. Additionally, emission system components like a clogged or failed catalytic converter are frequent culprits. Electrical faults such as poor wiring connections or ECU errors can also activate the light. Actually, the light coming on doesn't necessarily mean immediate breakdown, but it indicates a problem exists. It's best to check the trouble codes with an OBD scanner promptly or visit a professional repair shop. Ignoring it long-term might lead to engine damage.
