I just bought the car and picked it up. I have the above code. Looked for vacuum leaks, replaced the IAC and cleaned the return spring/throttle-Body well. TB blade is a bit loose, but since I work on older cars (95 and earlier) this is driving me nuts. I can tell the air box has been replaced and the exhaust has been replaced (just 3" pipe from turbo to exhaust tip. I have not checked the intake gasket, but everything I can think of has been checked for leak, Wiring for TPS was replaced before I got car. I am not aware of any other mods. I can send pic of under-hood area in the hope someone can spot what I don't know to look for.Any help is welcome.