The check engine light is one of the most important warning indicators in your vehicle. It’s designed to alert you to potential problems that may affect your car’s performance, safety, or emissions. While it can sometimes indicate a minor issue, ignoring it could lead to more expensive repairs. 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 why your check engine light might illuminate.

Faulty Oxygen Sensor

The oxygen sensor measures the amount of unburned oxygen in your vehicle’s exhaust system. This data helps the engine control module adjust the air-fuel mixture for optimal performance. When the oxygen sensor fails, it can send incorrect readings, causing the engine to run inefficiently. A faulty sensor may reduce fuel-economy and increase emissions. 

Loose or Damaged Gas Cap

A loose or damaged gas cap might seem like a trivial issue, but it can trigger the check engine light. The gas cap seals the fuel system. If it isn’t tightly secured, fuel might evaporate before your engine gets the chance to run on it.

Malfunctioning Mass Airflow Sensor

The mass airflow (MAF) sensor measures the amount of air entering the engine, helping to regulate the air-fuel ratio. If the MAF sensor malfunctions, it can cause issues such as rough idling, reduced fuel-efficiency, and even stalling. 

Catalytic Converter Issues

The catalytic converter does the vital job of converting harmful gasses into less polluting substances. If the converter is failing, it can cause your check engine light to come on. Symptoms of a failing catalytic converter include reduced engine performance, poor fuel-economy, and an increase in emissions.

Faulty Ignition Coil or Spark Plugs

The ignition coil and spark plugs work together to ignite the air-fuel mixture in the engine’s cylinders. When these parts are worn out or malfunctioning, they can cause misfires, rough idling, and decreased fuel-efficiency. A failing ignition system component will often trigger 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 local auto shop, we can expertly address your vehicle’s repair and maintenance needs. Feel free to give us a call to schedule an appointment!