02 sensor problem changed all 4 still getting codes
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Joined: Sep 2005
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02 sensor problem changed all 4 still getting codes
99 Expedition 5.4
just repalced all 4 o2 sensors and the light came back and says o2 bank 1 & 3 bad. any help appreciated
which one is bank 1 & 3 thanks
just repalced all 4 o2 sensors and the light came back and says o2 bank 1 & 3 bad. any help appreciated
which one is bank 1 & 3 thanks
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From: Houston, Tx
If you want he advice from Ford technicians, I suggest you ask your question here : Flatratetech.com
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From: BC, Canada
What were the actual codes that were received? Not just the code description please.
Usually O2 codes arent caused by the sensors themselves but by something that can cause the wrong air/fuel ratio such as a vacuum leak, dirty MAF sensor, plugged fuel filter etc.
Usually O2 codes arent caused by the sensors themselves but by something that can cause the wrong air/fuel ratio such as a vacuum leak, dirty MAF sensor, plugged fuel filter etc.
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Joined: Apr 2002
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From: Portland
Not sure if its the same on the Expy as it is on the Sport Trac but I had some error codes that would have lead me to believe it was the o2 as well. I changed both of my sensors and the code was still there, I took it in to the dealer and paid my 75.00 to find out that it was a 20.00 part. There was a vacuum line from the front of the engine to the rear and the rubber elbow had a tear in it, that was the problem. It took me 5 minutes to fix.
Just a thought.
Just a thought.
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Senior User
Joined: Oct 2004
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From: Richmond, TX
Originally Posted by dmbturbo69
codes are p0171 & p0174
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