HOW DO I TURN OFF CHECK ENGINE LIGHT ON MY HYUNDAI ACCENT 1.5 CDX?

I took my Hyundai accent 1.5 CDX to couple of garages to get the CHECK ENGINE light problem fixed but nobody could fix it so far.No problem was found in the car and the CHECK ENGINE light was stoped by deleting it from the memory but as soon as I came out of the garage the light appeared again and now it flickers and stays.Nobody understood this problem.Please hep me to fix this problem.