Common Reasons the Check Engine Light Illuminates
When the engine light illuminates, it can be alarming, signaling that something is amiss under the hood. Understanding the common reasons for this warning can help you take timely action and avoid costly repairs. At Roswell Transmission and Car Care, we provide expert check engine light diagnostics and repair in the greater Roswell, GA area. Here are five common causes for the check engine light to turn on.
Faulty Oxygen Sensor
Oxygen sensors play a crucial role in monitoring the level of oxygen in your vehicle’s exhaust system. If the sensor malfunctions, it can lead to poor fuel-economy and increased emissions, prompting the check engine light to turn on. Replacing a faulty oxygen sensor is typically straightforward and can improve your vehicle’s performance.
Bad Catalytic Converter
The catalytic converter is a vital component in your vehicle’s exhaust system, converting harmful gasses into less harmful emissions. If it becomes clogged or damaged, it can cause a significant decrease in engine performance and fuel-efficiency, leading to the illumination of the check engine light.
Worn Spark Plugs or Wires
Spark plugs and their associated wires are essential for igniting the air-fuel mixture in your engine’s cylinders. If they become worn or damaged, it can lead to misfires and decreased engine performance. A check engine light may illuminate to alert you of this issue. Replacing spark plugs and wires at manufacturer-recommended intervals can help prevent this problem.
Loose or Damaged Gas Cap
One of the simplest reasons for a check engine light to turn on is a loose or damaged gas cap. The gas cap is designed to create a sealed environment for your fuel system. If it’s not properly tightened, fuel may evaporate before your engine gets the chance to use it.
Mass Airflow Sensor Issues
The mass airflow sensor (MAF) measures the amount of air entering the engine, allowing the computer to determine the correct amount of fuel to inject for optimal performance. If the MAF sensor is dirty or malfunctioning, it can lead to poor fuel-economy and performance issues, triggering the check engine light.
Check Engine Light Repair in Roswell, GA
When you need auto repair in Roswell, GA and the surrounding area, contact Roswell Transmission and Car Care at (770) 635-5971. Feel free to give us a call to schedule an appointment!









