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Old 11-02-2005, 07:59 PM
whitebuffalosab whitebuffalosab is offline
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2001 sport trac

I have replaced both oxygen sensors after showing a code of 171.. but after only driving an hour the check engine light comes backon and shows the same code.. Anyone out there with any ideas of what could be causing this?
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Old 11-03-2005, 06:50 AM
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way2old way2old is offline
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Re: 2001 sport trac

Check for a vacuum leak or a crack in the exhaust that will allow unmetered air to enter the system.
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