check gas cap light reset on 2000 Cadillac DeVille

check gas cap light will not go out

by in Big Lake, MN on May 10, 2010
1 answer
ANSWER by on November 14, 2010
Complexity of todays vehicles makes it difficult to diagnose without code reader with a laptop with OBD2 codes can be read. My 2004 Ford Explorer Sports Trac had the same issue. Replaced the Fuel Filler Cap which didn't help. Next removed battery cables so computer could reset. So far this worked for me. Only other issue that may have caused this I had to remove charcoal cannister back of fuel tank to install rear shocks. Air might have gotten into the system when hoses were removed for shock installation. This last statement is probably off base. Check for cracked or split hoses.
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Illumination of the Check Engine Light can be caused by a loose or worn gas cap.