The check engine light can be an unsettling sight for any driver. While it doesn’t always signal an emergency, it’s important to address it sooner rather than later. At Red Rock Auto Center, we provide expert check engine light diagnostics and repair in the greater Sedona, AZ area. Here are five common reasons your check engine light might come on.

Oxygen Sensor Failure

The oxygen (O2) sensor measures the level of unburned oxygen in your car’s exhaust and sends this information to the car’s computer. This helps to ensure the engine runs efficiently and reduces emissions. A faulty oxygen sensor can cause your engine to run inefficiently, potentially causing issues with other components like the catalytic converter. 

Catalytic Converter Issues

The catalytic converter reduces harmful emissions by converting pollutants into less harmful gasses. Over time, it can become clogged or damaged, especially if the car hasn’t been regularly maintained. A faulty catalytic converter can impact your vehicle’s performance and fuel-efficiency, while also leading to higher emissions. 

Mass Air Flow Sensor Problems

The mass air flow (MAF) sensor measures the amount of air entering the engine and helps regulate the fuel-air mixture. A faulty MAF sensor can cause poor fuel economy, rough idling, and even engine stalling. If you’re experiencing poor engine performance and the check engine light is on, the MAF sensor might be the culprit.

Loose or Damaged Gas Cap

A loose or damaged gas cap is one of the simplest issues that can trigger the check engine light. The gas cap seals the fuel system. If it’s not properly secured, fuel may evaporate before your engine gets the chance to run on it.

Spark Plug or Ignition Coil Issues

Spark plugs ignite the air-fuel mixture in the engine, while ignition coils provide the spark that ignites the plugs. If either of these components is worn or damaged, it can cause misfires, reduced power, and poor fuel-economy. Replacing spark plugs and coils according to your vehicle’s maintenance schedule can help keep your engine running smoothly.

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!