Can anybody instruct me on how I can fix the Check Engine light that came On. I did a fill up at Costco gas station and had the ignition key engaged so my wife can listen to CD music. The Check Engine never lit up before this, so I am assuming that was the problem. I know now I should remove the key (as a habit) before pumping filling up gas. However, can anyone give me a tip on how I can cure the problem since I heard they charge an arm and a leg to get it reset at the dealer. I was told maybe by unhooking the battery for some time can resolve the problem. Secondly, can a regular mechanic fix it? Thanks for any feedback. Johnny