I have a 2001 Blazer and I can not get these codes to go away is there any advice for removing the emissions PO410 and PO418 codes and could these affect the AC compressor my AC stops working when the service engine light comes on seems to be connected some how when the light turns off the AC stops working but lately the light will not go out and AC is down it runs perfect and everything else seems fine but inspection is coming soon and I don't want to go to a dealer if I can help it I checked the fuse behind the battery and the relay to the air pump they are good all wires are good pulled brush guard and air pump looks ok but I have no way to test it