1. Oxygen sensor: A faulty oxygen sensor can cause the engine light to turn on. The oxygen sensor measures the amount of oxygen in the exhaust gas and helps regulate the air-fuel mixture. If the oxygen sensor is not functioning properly, the air-fuel mixture can be incorrect and cause the engine light to turn on.
2. Catalytic converter: A faulty catalytic converter can also cause the engine light to turn on. The catalytic converter helps convert harmful exhaust gas emissions into less harmful ones. If the catalytic converter is not working properly, it can cause the engine light to turn on.
3. Spark plugs: Worn-out spark plugs can cause the engine light to turn on. Spark plugs are responsible for creating a spark that ignites the air-fuel mixture in the engine. If the spark plugs are worn out, they can cause misfires and the engine light to turn on.
4. Ignition coils: Faulty ignition coils can also cause the engine light to turn on. Ignition coils provide electrical power to the spark plugs. If the ignition coils are not functioning properly, they can cause misfires and the engine light to turn on.
5. Mass air flow sensor: A faulty mass air flow sensor can also cause the engine light to turn on. The mass air flow sensor measures the amount of air entering the engine. If the mass air flow sensor is not functioning properly, the air-fuel mixture can be incorrect and cause the engine light to turn on.
6. Engine oil pressure sensor: A faulty engine oil pressure sensor can also cause the engine light to turn on. The engine oil pressure sensor monitors the oil pressure in the engine. If the engine oil pressure sensor is not functioning properly, it can cause the engine light to turn on.
7. Coolant temperature sensor: A faulty coolant temperature sensor can also cause the engine light to turn on. The coolant temperature sensor measures the temperature of the engine coolant. If the coolant temperature sensor is not functioning properly, it can cause the engine light to turn on.
It is important to have the cause of the engine light diagnosed as soon as possible. Driving with the engine light on can cause further damage to the engine and other components of the vehicle.
