What does it mean when the engine yellow light on the car dashboard is on?
2 Answers
There are two situations when the engine yellow light on the car dashboard is on: 1. When the car's power is turned on, the vehicle will perform a self-check. At this time, not only the engine yellow light will be on, but other fault lights will also light up together, and then they will all go out, which is a normal phenomenon; 2. After the car is started, the engine's fault yellow light remains on, which is the ECU reminding that there is a fault in the engine, and this is an abnormal phenomenon. When the engine fault light on the dashboard is on, you can try to start and turn off the vehicle three times in a row, or turn off the engine and disconnect the negative terminal of the engine battery, wait for 30 seconds, reconnect it, and then try to start the engine.
Every time the yellow engine light on my car's dashboard comes on, it makes me reflect on my years of driving experience. Actually, it's telling me there's a minor issue in the engine system, like a faulty sensor or abnormal emissions, but the car can still be driven—it's not a major problem. Common causes include a malfunctioning oxygen sensor, a faulty air flow meter, or issues with the fuel system. I remember one time when the light came on, and after checking, it turned out to be old spark plugs causing incomplete combustion—replacing them fixed it. I recommend not delaying because it could lead to increased fuel consumption or bigger problems. For safety, I immediately slow down and drive carefully to the nearest repair shop to have the trouble codes read with a diagnostic tool—it saves money and hassle. Regular engine maintenance can help prevent this from happening often.
