Question about 2004 Ford F150
P0401-Insuffcient EGR Flow, this is caused by clogged EGR ports or a bad DPFE sensor. Is this the 4.6L ? go to my profile page and look at my tips for P0401, try those tips and see if that corrects your light. Hope that helps.
Posted on Aug 05, 2010
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Posted on Jan 02, 2017
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