1997-2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

Po171(bank1)

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Old 11-11-2006, 06:19 PM
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Po171(bank1)

What is the part that the code po171 stand for
 
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Old 11-11-2006, 06:45 PM
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It means your system is too lean, for a variety of causes. Among those are fuel filter, air induction system, EGR system and MAF system problems. The book lists 17+ possible causes in all.
 
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Old 11-11-2006, 09:59 PM
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Clean your MAF sensor and check for vacuum leaks
 
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