What is the reason for the yellow engine light flashing on the car dashboard?
2 Answers
The reasons for the yellow engine light flashing on the car dashboard are: 1. Sensor issues. When these sensors are damaged, have poor contact, or signal interruption, the car's ECU cannot accurately obtain engine data, causing the light to turn on; 2. Poor engine maintenance, which can also trigger the engine fault light; 3. Poor combustion of the air-fuel mixture, engine carbon buildup, or knocking. These conditions are detected by the engine's oxygen sensor and reported to the ECU, which then illuminates the fault light. It is important to note that when the engine fault light on the dashboard is illuminated, it cannot be manually reset. Typically, it must be taken to a 4S shop for troubleshooting with a fault diagnostic tool before it can be turned off.
If the engine light is flashing yellow, I've seen too many similar cases, usually due to engine misfires or ignition system issues. It means one or more cylinders aren't properly burning fuel, leading to excessive exhaust emissions. Common causes include worn or damaged spark plugs, faulty ignition coils, or clogged fuel injectors. For example, a friend's car once had the light flashing on the highway, and it turned out to be carbon buildup on the spark plugs. Fortunately, it was fixed in time to avoid more serious damage. Don't underestimate this flashing light—it not only indicates serious emission problems but could also cause the catalytic converter to melt, leading to expensive repairs. It's advisable to find a safe place to pull over and turn off the engine, preferably using an OBD scanner to read the trouble codes, or go directly to a professional shop for diagnosis. Don't risk driving long distances with this issue.
