* Oxygen sensor failure. The oxygen sensor measures the amount of oxygen in your vehicle's exhaust system. If the oxygen sensor fails, it can cause the engine to run poorly and may cause the service engine soon light to come on.
* Spark plug failure. The spark plugs provide the spark that ignites the fuel in your engine. If a spark plug fails, it can cause the engine to misfire and may cause the service engine soon light to come on.
* Fuel injector failure. The fuel injectors deliver fuel to the engine. If a fuel injector fails, it can cause the engine to run lean or rich, which can cause the service engine soon light to come on.
* Catalytic converter failure. The catalytic converter helps to clean your vehicle's exhaust emissions. If the catalytic converter fails, it can cause the engine to run poorly and may cause the service engine soon light to come on.
Additional problems could be:
* Loose gas cap
If you see the service engine soon light on, it is important to have your vehicle checked by a qualified mechanic as soon as possible. Driving with the service engine soon light on can cause further damage to your vehicle.
