Why is the engine's yellow light constantly on?

[OAdriana]

The reason the engine's yellow light stays on is that there are some faults in the engine, reminding the owner to inspect and repair the issues promptly. The causes for the engine malfunction light to illuminate include: 1. Poor fuel quality; 2. Carbon deposits accumulated in the engine; 3. Damaged, poorly connected, or interrupted signals from components such as water temperature sensor, crankshaft position sensor, air flow sensor, intake air temperature sensor, and oxygen sensor; 4. Clogged air filter in the vehicle. The function of the engine is to convert the thermal energy of gasoline or diesel into mechanical energy by expanding the gas after combustion in a sealed cylinder, thereby driving the piston to perform work. Methods for engine maintenance include: 1. Regularly changing the engine oil and filter; 2. Using lubricants of appropriate quality grades; 3. Periodically cleaning the radiator; 4. Regularly replacing the air filter, oil filter, and fuel filter; 5. Maintaining good ventilation in the crankcase and cleaning it regularly; 6. Periodically cleaning the fuel system.