What Causes the Malfunction Light to Illuminate in a Van?

[DelAlejandro]

The reasons for the malfunction light illuminating in a van are: 1. Poor fuel quality; 2. Dirty engine cylinders with carbon deposits; 3. Damaged, poor contact, or signal interruption of the water temperature sensor, crankshaft position sensor, air flow sensor, intake air temperature sensor, or oxygen sensor; 4. Clogged air filter in the vehicle. The solutions for the malfunction light illuminating in a van are: 1. Promptly inspect the engine condition of the van; 2. Check the status of the van's sensors, air flow sensor, and spark plug components; 3. Inspect the van for any knocking conditions; 4. Regularly clean engine carbon deposits; 5. Replace with high-quality fuel in a timely manner.