A glowing check engine light doesn’t automatically mean that your engine is on the cusp of total failure. However, it’s important to promptly visit the shop for diagnostics so the issue can be pinpointed and resolved before it escalates. At Red Rock Auto Center, our local mechanics provide expert check engine light repair in the greater Sedona, AZ area. Here are five common causes of an illuminated check engine light. 

Faulty Oxygen Sensor

One of the most common reasons the check engine light comes on is a malfunctioning oxygen sensor. These sensors monitor the level of oxygen in the exhaust gasses and help regulate fuel injection. A failing oxygen sensor can lead to reduced fuel-efficiency, increased emissions, and potential issues with the catalytic converter.

Bad Mass Airflow Sensor

The mass airflow sensor measures the amount of air entering the engine and helps determine the proper fuel-to-air ratio. When this sensor malfunctions, it can cause a variety of issues, including rough idling and a decrease in engine performance.

Catalytic Converter Issues

A failing catalytic converter can also trigger the light. Responsible for converting harmful gasses into less harmful ones, a malfunctioning catalytic converter can lead to increased emissions, reduced engine performance and the illumination of the check engine light.

Spark Plug or Ignition Coil Problems

If your spark plugs or ignition coils are faulty, the engine may misfire, which can cause reduced fuel-efficiency and other issues. Misfires can be caused by worn-out spark plugs, damaged ignition coils, or other ignition system issues, all of which may prompt the check engine light to come on.

Loose/Faulty Gas Cap

Something as simple as a loose or damaged gas cap can trigger the check engine light. The gas cap plays a crucial role in maintaining the pressure in the fuel system. If it's not sealed properly, fuel may evaporate before it is directed toward your engine.

Check Engine Light Diagnostics & Repair in Sedona, AZ

For check engine light repair in Sedona and the surrounding area, contact Red Rock Auto Center at (928) 451-7431. Feel free to give us a call today to schedule an appointment!