What to Do When the Engine Fault Light Comes On While Driving on the Highway?
1 Answers
If you encounter the issue of the fault light coming on while driving on the highway, you can first observe whether there are any obvious abnormalities in the engine. The most direct way is to check if any other indicator lights are also illuminated simultaneously. Generally, if the yellow light comes on and it does not substantially affect the car's power, you can cautiously drive at a low speed and find time to visit a 4S shop for inspection after exiting the highway. Reasons for the fault light coming on: 1. Oxygen sensor malfunction. When the oxygen sensor is displaced or severely damaged due to intense collision, it will cause the engine's yellow fault light to illuminate. The oxygen sensor is used to monitor the engine's combustion state. If the combustion is incomplete, resulting in excess oxygen after emission, it will feedback to the ECU, thus intelligently alerting the driver. 2. Poor gasoline quality. This is mainly reflected in the fuel quality not matching the engine's requirements to fully achieve good performance. 3. Severe carbon deposits in the cylinder, which usually occur in cars frequently driven at low speeds in urban areas. Once severe, this can also cause engine knocking, leading to symptoms such as reduced power, abnormal shaking and noise, and even piston knocking. In such cases, the fault light will definitely issue a warning.
