If your check engine light turns on, it’s best to promptly visit the shop for diagnostics. Although this light doesn’t necessarily mean that your engine is on the verge of total failure, you should identify and address the issue before it gets the chance to worsen. At Roy’s Quality Car Care, we provide expert check engine light diagnostics and repair in the greater Hagerstown area. Here’s a look at five common reasons the check engine light turns on.

Catalytic Converter Issues

The catalytic converter is a crucial part of the emissions system. It converts harmful gasses into less harmful substances before they exit the exhaust system. If the catalytic converter is failing, it can cause the check engine light to turn on. A bad catalytic converter can lead to decreased performance and increased emissions, and it commonly requires replacement.

Oxygen Sensor Malfunction

Oxygen sensors measure the amount of unburned oxygen in the exhaust system and help regulate the fuel mixture. If an oxygen sensor fails, the car's computer can't set the correct air-fuel ratio, leading to poor engine performance and higher emissions. 

Loose or Faulty Gas Cap

A loose or damaged gas cap is actually a common reason for the check engine light to come on. The gas cap seals the fuel system. If it’s not tight or if it’s cracked, fuel may evaporate before your engine has the chance to run on it.

Mass Airflow Sensor Problems

The mass airflow sensor measures the amount of air entering the engine and determines how much fuel to inject for optimal combustion. If the mass airflow sensor is faulty, it can cause a drop in fuel-economy. 

Spark Plug/Ignition Coil Issues

Spark plugs and ignition coils are vital for engine performance. Spark plugs ignite the air-fuel mixture in the cylinders, while ignition coils provide the necessary voltage to create the spark. If these components are worn out or malfunctioning, they can cause misfires and reduced power. Replacing faulty spark plugs or ignition coils can resolve the issue.

Check Engine Light Repair in Hagerstown, MD

When you need auto repair in Hagerstown and the surrounding area, contact Roy’s Quality Car Care at (301) 288-3572. At our local 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!