If your check engine light has illuminated, it could be due to a variety of reasons, some of which may surprise you. Here are four unexpected reasons why your check engine light may have come on:

- Loose or Faulty Gas Cap: A loose, damaged, or missing gas cap can cause fuel to evaporate from your vehicle’s fuel system, triggering the check engine light.
- Faulty Oxygen Sensor: The oxygen sensor measures the amount of oxygen in your exhaust gases and helps your vehicle’s computer adjust the air-fuel ratio. A faulty oxygen sensor can lead to reduced fuel efficiency and increased emissions.
- Bad Spark Plugs or Ignition Coils: Spark plugs and ignition coils are essential for the combustion process in your engine. If they are worn out or malfunctioning, your engine may misfire, causing the check engine light to come on.
- Faulty Mass Airflow Sensor: The mass airflow sensor measures the amount of air entering your engine and helps determine the proper fuel injection. A faulty mass airflow sensor can lead to poor engine performance and increased emissions.
If your check engine light is on, it’s essential to have your vehicle inspected by a professional mechanic, like those at MGC Car Service, to determine the exact cause. Ignoring the check engine light can lead to more severe issues and costly repairs down the road. Trust our experts to diagnose and resolve any issues to keep your vehicle running smoothly.