Thanks, already did that. Took the Idle Air Control Valve off and cleaned that, as well as cleaning the MAF sensor with MAF cleaner. I've driven it about 10 times since I cleared the codes for lean bank, IAV stuck open, and so far, no engine codes have returned. I'm trying not to drive it, other than for testing, until I can get that scanner and get the trans failsafe cleared (hopefully I can do that with the NT-520).