An illuminated check engine light doesn’t automatically mean that your engine is on the brink of complete disaster. Nonetheless, you should promptly visit the shop for diagnostics so that the issue can be pinpointed and resolved before it gets worse. At HESCO Automotive & Performance Center, we provide expert check engine light diagnostics and repair in the greater Birmingham, AL area. Here are five common reasons the check engine light turns on.

Catalytic Converter Issues

The catalytic converter reduces harmful emissions by turning pollutants into less harmful substances. Issues with the catalytic converter can result in decreased engine performance and increased emissions. Signs of a catalytic converter issue include decreased acceleration and a smell like rotten eggs. 

Faulty Oxygen Sensor

One of the most common culprits behind the check engine light is a malfunctioning oxygen sensor. This sensor monitors the level of oxygen in the exhaust gasses and helps regulate the fuel-air mixture for optimal combustion. Ignoring oxygen sensor issues can result in more severe problems with your vehicle's catalytic converter.

Faulty Mass Airflow Sensor

The mass airflow sensor (MAF) measures the amount of air entering the engine, allowing the engine control module to adjust the fuel injection accordingly. A malfunctioning MAF sensor can lead to poor fuel-economy and rough idling. 

Spark Plug or Ignition Coil Problems

Worn-out or faulty spark plugs and ignition coils can cause misfires in the engine, triggering the check engine light. Misfires can lead to decreased fuel-efficiency and rough engine performance. Regularly replacing spark plugs and addressing ignition coil issues can help maintain optimal engine function.

Loose or Damaged Gas Cap

The gas cap seals the fuel system and helps maintain proper pressure. If it's not securely fastened or has any damage, it can allow fuel vapors to escape, potentially triggering the check engine light. 

Check Engine Light Diagnostics & Repair in Birmingham, AL

When you need engine diagnostics and repair in Birmingham and the surrounding area, contact HESCO Automotive & Performance Center at (205) 526-3796. At our nearby auto shop, we can expertly address your vehicle’s repair and maintenance needs. Feel free to give us a call today to schedule an appointment!