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PO171 and PO174 both throwing check engine light on 96 ranger 4.0
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01-20-2012, 01:56 PM
FireRanger
Blinded by the light
Join Date: Sep 2009
Posts: 7,674
Re: PO171 and PO174 both throwing check engine light on 96 ranger 4.0
That code is caused by vacuum leaks. You just haven't found the leak yet unfortunately.
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