What Does the Check Engine Light Mean?
The check engine light (also known as the Malfunction Indicator Lamp) is your vehicle's way of telling you something isn't quite right. While it doesn't always mean a major fault, it should never be ignored.
Sometimes the issue is as simple as a loose fuel cap, while other times it can indicate an engine, sensor or electrical fault that requires professional diagnosis.
Common causes of the check engine light
Worn Spark Plugs or Ignition Coils
Ignition faults often cause engine misfires, poor performance and may cause the check engine light to flash.
Faulty Oxygen (O2) Sensor
A failed oxygen sensor can cause poor fuel economy, rough running and increased emissions.
Mass Airflow (MAF) Sensor Issues
A dirty or faulty MAF sensor may result in sluggish acceleration, rough idling or engine stalling.
Loose Fuel Cap
A loose or damaged fuel cap can trigger the warning light by allowing the fuel system to lose pressure.
Battery or Charging Problems
Low battery voltage or a failing alternator can cause multiple warning lights and misleading fault codes.
Not every warning light means disaster, but every warning light deserves attention.
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