Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Average mileage: 105,000 (54,000–156,000)
Exhaust & Emissions affected: Gasoline
18 people reported this problem
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On vacation in Florida, 1200 miles from home. Check engine light illuminates and I was lucky enough to be in an area where there was a dealer who stayed open later in the evening. The gentleman at the entry gate ran the code and it came back as a gas cap failure. Purchased and installed new cap and dealer reset computer. This seemed to be a cheap and easy fix. Approximately 800 miles into my return trip I recieved the same code via On-Star. I have replaced the cap 3 times with OEM equipment. Problem still exists. No problems with performance but I live in an area that requires emission inspections and now the code returns before the 100 mile requirement for the state regualated equipment will allow my inspection.