Volkswagen Passat electronic throttle fault light is on.

Passat fault light is on for the following reasons: 1. The engine is in a bad combustion state. 2. Poor fuel quality. 3. The engine cylinder is not clean. 4. Depositing carbon deposits. The solution is as follows: 1. When the engine fault light is on, it needs to be diagnosed with a computer detector. If it is a false fault code, it can be cleared. 2. If there is a fault, check and repair it according to the fault code. If the engine fault light is on, driving is normal and there is no obvious abnormality, you can drive to the 4S shop for inspection. 3. If the water temperature is too high or the oil pressure warning light is on, it is obviously faulty and you need to seek rescue.