yboy82 3/22/2011When you said no codes shown, you mean you already diagnose your vehicle with a scan tool to verify if there is a stored trouble code?
HouseCallAuto 3/22/2011I do not understand why you see no code. When the light is on, if checked same day there will be a fault code there. No code, no fix, just guesswork. Try a new gas cap, cheap part, but I suspect a different cause.