Ok, I just took out my bad IAT sensor off my intake manifold and put a new one in cause I was getting a checking engine light for it (10). Then I pulled the ECU fuse and backup fuse and let the car sit for about half an hour. I then put the fuses back in and started the car up without touching the throttle and let it run for a few minutes. So how can it be that I am still getting a check engine light for the intake air temp sensor? When the CEL starts flashing is there a flash just to show you that it is working or does it just start with the codes right away?