hi guys, new in your forum- i have a check engine light problem that won't go away. 2 years ago i have the CEL come on and was able to clear it by following the procedure in this forum- holding down the button for 3-5 seconds and read the blinking led. now this procedure won't work anymore, disconnected the ground a few times and repeated the procedure but no response from the led at all. (not blinking back) (162,788 miles) i do the preventive maintenance ( oil, brakes, tune up and other small things). where do i start looking for clues how to solve this problem. please help, thanks