i now have use of my wifes car for a few days so im pulling out my RCM and sending it to be repaired .......sunday morning on the way to church my CHECK ENGINE light came on im hoping it is because of my needed repair so after i get my RCM back how do i clear the CHECK ENGINE LIGHT??? im thinking i have to go to a shop to have it done or when the repair is done no moore problem and light goes off???