Few dashboard warnings cause as much anxiety as the check engine light. Whether it appears as a steady glow or a flashing alert, this warning indicates that your vehicle’s onboard diagnostic system has detected a problem. While some issues are minor and easy to fix, others may require immediate attention to prevent further damage. At Gab’s Auto Repair, we provide expert check engine light diagnostics and repair in the greater Phoenix area. Here are four common reasons the check engine light illuminates.

Failing Oxygen Sensor

The oxygen sensor measures the amount of unburned oxygen in your vehicle’s exhaust system and helps regulate the air-fuel mixture. When this sensor fails, your engine may burn more fuel than necessary, reducing efficiency and increasing emissions. Symptoms can include poor fuel-economy, rough idling, or sluggish acceleration. Replacing a faulty oxygen sensor promptly helps restore performance and prevent issues with other components, such as the catalytic converter.

Catalytic Converter Issues

The catalytic converter reduces harmful emissions by converting pollutants into less harmful gases before they exit the exhaust system. If it becomes clogged or damaged, you may notice reduced power, decreased fuel-efficiency, or a sulfur-like odor. 

Mass Airflow Sensor Problems

The mass airflow sensor measures the amount of air entering the engine and helps to ensure the correct fuel mixture for combustion. When this sensor malfunctions, you may notice rough idling, stalling, or difficulty starting your vehicle. A faulty mass airflow sensor can also reduce fuel-efficiency. 

Ignition System/Spark Plug Failure

Spark plugs and ignition coils play a critical role in starting your engine and keeping it running smoothly. When they wear out or fail, the engine may misfire, vibrate, or hesitate during acceleration. Ignoring ignition system issues can lead to worsening engine problems.

Check Engine Light Diagnostics & Repair in Phoenix, AZ

For expert auto repair in Phoenix and the surrounding area, contact Gab’s Auto Repair at 602-404-3690. At our local auto shop, we can thoroughly address your vehicle’s repair and maintenance needs. Feel free to give us a call to make an appointment for car care in greater Phoenix, AZ!