European Auto Service

Peterson Dynamics Automotive

Why Is My Check Engine Light On?

If youve ever been driving and seen the dreaded check engine light come on, you know it can be an unsettling experience. But dont worry, it doesnt necessarily mean theres a major problem with your vehicle. In this blog post, well discuss some of the most common causes of a check engine light and what to do if it happens to you. 

The most common cause of the check engine light coming on is a loose or faulty gas cap. This can happen if the cap is not properly tightened after you fill up your tank or if its become worn and needs to be replaced. To fix this issue, simply make sure the gas cap is tightly secured and if its been worn down, you can purchase a replacement at any auto parts store. 

Another potential cause of a check engine light is a faulty oxygen sensor. An oxygen sensor monitors the amount of oxygen in the vehicles exhaust system and sends a signal to the engine control unit (ECU). If the sensor is not working properly, the ECU will trigger the check engine light. To fix this issue, youll need to have a qualified mechanic replace the sensor.