You gotta be careful with the AZ clowns.
I had a check engine light two weeks ago. Had Bozo run the codes, the scanner said I had two codes but Bozo would only show me one, said he couldn't call up the second till I fixed the first one, then proceeded to tell me it was the gas cap.
I took the scanner from him, called up the second code and wrote both down. Went home and the codes were IAC related. So I cleaned my IAC, cleared my codes and haven't had a problem since.
Steve