What to Do When the Engine Light Comes On?
2 Answers
When the car's engine light comes on, it usually indicates an issue with the engine's front oxygen sensor. This problem often arises when the owner fails to change the engine oil regularly or does not clean the coolant impurities inside the engine in time, leading to oxygen sensor failure. If the oxygen sensor malfunctions, fuel consumption is likely to increase significantly. Additionally, if the thermostat is abnormal, the engine fault light will also illuminate. Typically, failure to replace the coolant within the specified mileage or lack of radiator function in the engine coolant tank can cause the thermostat to rust or even break down. In such cases, it is usually sufficient to visit a repair shop for a computer diagnosis and replace the faulty part if necessary.
I've been driving for decades and have seen the engine light come on many times. Don't panic—first, pull over safely, turn off the engine, and let the car cool down. The most common cause is a loose gas cap. Get out and check if the cap is loose or dirty, then tighten it and restart to see if the light goes off. Listen for unusual engine sounds, like knocking or black smoke. If everything seems normal, drive slowly to a repair shop for inspection—don't delay, or you risk damaging the catalytic converter and facing costly repairs. Last time my light was on, it was an oxygen sensor issue, fixed for a few hundred bucks—early detection saves hassle. Regular maintenance like oil changes and air filter replacements helps prevent these minor issues.
