Metro check engine light

My understanding is on my 1995 the constant "Check Engine" light is an EGR problem, I am not receiving any fault codes, my question is will the ECM reset itself after so many miles or do I have to reset it after repairs are made? I am tired of resetting my radio channels! I have cleaned the carbon out of the passage and EGR value (many times now) I think I have it all now but need to know if ECM will reset or do I kill the radio memory again? Thanks in advance for your help

If you don't want to reset your radio, you can unplug the computer behind the glovebox. Can be difficult to do the 1st time but I prefer that method. If the check engine light is on there should be a code set, if there isn't I would suspect there may be an issue with the computer.