10 Reasons Your Check Engine Light Might Be On

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1. Loose or Faulty Gas Cap: It might sound trivial, but a loose or faulty gas cap can trigger the check engine light. 

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2. Oxygen Sensor Malfunction: Your car’s oxygen sensor monitors the amount of unburned oxygen in the exhaust.

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3. Catalytic Converter Issues: The catalytic converter is a vital component of your car’s exhaust system.

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4. Faulty Spark Plugs or Wires: Spark plugs ignite the fuel-air mixture in the engine’s cylinders, creating the explosion that powers your car.

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5. Mass Airflow Sensor Failure: The mass airflow sensor (MAF) measures the amount of air entering the engine and determines.

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6. Emission Control System Issues: Your car’s emission control system reduces the amount of pollutants released into the environment. 

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7. Faulty Ignition Coil: The ignition coil transforms the battery’s voltage into a spark that ignites the fuel.

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8. Exhaust Gas Recirculation (EGR) Valve Malfunction: The EGR valve recirculates a portion of your exhaust gases.

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9. Battery or Charging System Problems: While not directly related to the engine, issues with your car’s battery or charging system .

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10. Transmission Issues: The transmission works closely with the engine to ensure your car runs smoothly.

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