* Low oil level: If the oil level is low, the engine will not be able to circulate oil properly, which can cause damage to the engine.
* Dirty air filter: A dirty air filter can restrict the flow of air to the engine, which can cause the engine to run rich and produce more emissions.
* Faulty oxygen sensor: The oxygen sensor monitors the amount of oxygen in the exhaust gas and helps the engine to adjust the air/fuel mixture accordingly. If the oxygen sensor is faulty, the engine may run rich or lean, which can cause the engine light to come on.
* Faulty spark plugs or wires: Faulty spark plugs or wires can cause the engine to misfire, which can also cause the engine light to come on.
* Catalytic converter failure: The catalytic converter helps to convert harmful emissions into less harmful substances. If the catalytic converter fails, the engine light will come on.
If the engine light on your 1998 GMC Jimmy comes on, it is important to have it diagnosed and repaired as soon as possible. Ignoring the engine light can lead to more serious problems and costly repairs.
