Seeing the check engine light illuminate on your dashboard can be unsettling. While it doesn’t always signal an immediate emergency, it does mean your vehicle’s onboard computer has detected an issue that needs attention. Ignoring the light can lead to reduced performance, lower fuel-efficiency, and more costly repairs over time. At Red Rock Auto Center, we provide expert check engine light diagnostics and repair in the greater Sedona, AZ area. Here’s a look at four common reasons your check engine light might come on.

Oxygen Sensor Failure

Oxygen sensors monitor the amount of unburned oxygen in the exhaust and help the engine adjust the air-fuel mixture for optimal performance. When an oxygen sensor fails, the engine may run less efficiently and produce higher emissions. A faulty sensor can also cause decreased fuel-economy and, if left unaddressed, may damage the catalytic converter.

Failing Catalytic Converter

The catalytic converter is responsible for reducing harmful emissions by converting exhaust gases into less harmful substances. When it begins to fail, the check engine light often comes on to signal reduced efficiency. With a failing catalytic converter, you may notice a smell similar to rotten eggs.

Ignition Coil or Spark Plug Issues

Spark plugs and ignition coils are essential for proper combustion. Worn spark plugs or failing ignition coils can cause misfires, rough idling, and hesitation during acceleration. These misfires are quickly detected by the vehicle’s computer, triggering the check engine light. Addressing ignition issues promptly helps keep the engine running smoothly.

Mass Airflow Sensor Problems

The mass airflow sensor measures the amount of air entering the engine so the computer can calculate the correct amount of fuel to inject. When this sensor malfunctions, the engine may struggle with starting, stalling, or poor acceleration. Fuel efficiency often drops as well. 

Check Engine Light Diagnostics & Repair in Sedona, AZ

For expert 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 to make an appointment for car care in greater Sedona, AZ!