Famous Check Engine Light Car Running Normal References. Your car has sensors designed to check the seal of the gas cap, as it must be able to contain the fumes of evaporated gas. The check engine light has long puzzled drivers with its vague warning.
Web a loose or faulty gas cap is the most likely cause of a check engine light, even though the car may be running fine.the check engine light on but car runs fine is also caused by a clogged air filter, bad maf sensor, or bad oxygen sensors, and automatic transmission issues. Issues can range from anything minor, such as a loose gas cap, to problems that are more severe, such as a failing sensor. Web what does the check engine light mean?
