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1998 Ford Expedition Question: P0401 code

 

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Firestart, Deer Park, TX, January 05, 2011, 05:58
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check eng. light comes on. Changed DPFE, EGR, Idil air control and light still comes on. Pressley.Rick@yahoo.com

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  • Answer #1

    January 05, 2011, 12:20
     Rookie

    egr ports are stoped up in the intake manifold will need to be cleaned out

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  • Answer #2

    January 05, 2011, 22:39
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     Master

    This could be a DPFE sensor failure too. Cheap and easy repair, at the side of the inake, two hoses and a mounting.

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