5.4 140T miles. It has exhaust leak P's side at a CAT why wont idle? on 1997 Ford Expedition

Codes only say bad O2 sensors.

by in Albany, OR on June 23, 2013
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1 answer 2 comments
ANSWER by , June 23, 2013
Fix the obvious stuff first!! Like the exhaust leak, then clear codes, if 02 code comes back replace it. 02 cant read correctly with leak. This just might fix all of your problems.
COMMENT by , June 23, 2013
Thanks but I failed to mention the O2 faults came first and I was told that they can't make your engine run bad. Can the lack of back-pressure from the leak cause the bad idle?
COMMENT by , June 23, 2013
You were told wrong! Fix what you know is needed first. Then if it needs more start the diagnosis!