[mborutski]

the most important piece of info is missing. The previous codes.
although they seem to be unrelated some componants may cause "phantom"codes in other systems. ie: did you know that a faulty mass air flow sensor can cause mutiple oxygen sensor and mixture codes? and may not show the mass air flow sensor code at all.
if you could provide a list of codes/ parts replaced it can lead to the real problem.

when they replace a part they clear the computer of codes and then the computer has to go through a list of test before the light comes on for a fault that is found. this is why after the dealers road test the light doesn't come on for them but it does for you. some of the test require a certain eng temp, vehicle speed or key/trip cycles.

i may be able to help with enogh info
MB