Local Volkswagen Check Engine Light Diagnosis in Hagerstown, MD

The check engine light can be daunting when it comes on, especially if it happens seemingly without any other symptoms from your car. Because the check engine light can mean so many different things, it can also be stressful to the driver since there isn’t an immediately obvious fix. At Sheehy Volkswagen, we want to make it so that you don’t have to worry when your check engine light comes on because we’ll provide our check engine light diagnosis services and get you back on the road.

What Turns a Check Engine Light On

The check engine light is connected directly to the car’s computer, which ultimately determines whether the light is on or off. The computer receives input from hundreds of sensors throughout the vehicle, including many from the engine and fuel system. These sensors measure all sorts of parameters of engine function, like temperature, oxygen content, engine revolutions, etc. If one of these sensors takes a reading outside the normal range, it sends a code to the computer, and the computer will log the code and turn on the check engine light.

Our Certified Technicians Are Experts

Our technicians will do everything they can to help you, and they’ve got the knowledge and experience that makes their “everything” extremely comprehensive. They’ve studied, trained, and worked to become certified in vehicle service and repair and have gone to extra lengths to become Volkswagen certified. Volkswagen certification means that they can perform service on behalf of Volkswagen in warranty or recall-related situations, so they know your car inside and out and will perform service that’s up to Volkswagen standards.

How Check Engine Lights Are Diagnosed

The first thing our certified technicians will do is read the code in the computer that was logged when the check engine light turned on. While the code gives them an idea of what sensor took an abnormal reading, it doesn’t always explain why. That’s where their expertise and experience come in because they know all sorts of problems that can cause variations in sensor readings, and they’ll go through and rule out each one until they find the issue that caused your check engine light to turn on.