Originally Posted by Dgerow12
every once in a while when I put it in gear the rpms drop to about 400 or 500 but never dies out. My airpump is in the passenger fenderwell also so I wonder if that's where mine is. Do you know what kind of relay it is or how much? And why would this cause an o2 sensor code??
That relay ran about $250 from Ford. You can probably find it cheeper for the V6. It basically controls your fuel pump, which could cause it to maybe die or idle really low. Mine would just flat out die while driving or parked, but only when the rpms were droping back to an idle.
Call Ford and tell them whats happening and they will probably know what relay you need or what the problem is. But i would take it to a shop and have it diagnosed. Atleast that way you will know what to buy and you wont be replacing parts that are good.