What would cause my 2015 Chevy Trax check engine light to come on?

One of the reasons a check engine light will turn on on the 2015 Chevy Trax is a loose or faulty gas cap. The gas cap, also known as the fuel filler cap, is a simple but important component that is found on the vast majority of road going cars and trucks. Their purpose is simple; to prevent dirt, debris, and dust from entering the gas tank, as well as providing a reliable seal.Driving without Your gas cap will not harm Your engine. Driving without Your gas cap will not cause You to lose fuel. There is a flapper valve built into Your car, and it will stop fuel from flowing out of Your tank. Driving without Your gas cap will not deliver harmful fumes into Your passenger cabin.