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nomad196james
 Post subject: 2001 explorer sport trac, Codes P0401, P0171, and P0174.
PostPosted: Fri Sep 25, 2009 3:15 pm 
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Joined: Fri Sep 25, 2009 2:48 pm
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These codes popped up during for my emissions check. I knew I would fail it with the "check engine light" but i was hoping they could tell me where the problem persisted. Of course no luck and I am stuck on this one. I gave it a tune up and didn't see any holes in the lines. The motor runs great. Any advice would be greatly appreciated because Im trying to stay away from the shop.
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 Post subject: 2001 explorer sport trac, Codes P0401, P0171, and P0174. 
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asecmt
 Post subject: Re: 2001 explorer sport trac, Codes P0401, P0171, and P0174.
PostPosted: Fri Sep 25, 2009 5:00 pm 
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Joined: Tue Jun 17, 2008 7:06 pm
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Location: Atlanta GA
P0401 is usually the DPFE sensor, P0171, 174 could be either a hole in the PCV hose, leaking intake O rings, or a dirty or bad MAF sensor.
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