Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Average mileage: 109,500 (60,000–175,000)
20 people reported this problem
Check engine light came on and I took the car to repair shop. Mechanic kept the car for one day and told me that he had identified the problem as an ill-fitting gas cap. He replaced the gas cap because he said that it was worn and not fitting tightly enough and he said that was causing the engine light to go on. That sounded like repair shop voodoo to my husband, but amazingly the new gas cap solved the problem.