Diagnostic code: po4o1
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2002 Ford Explorer Question: Problem: check engine light staying on?
patrick mannion from Greg Solow's Engine Room, July 30, 2011, 13:34Master
Google " p0401 Ford Explorer 4.6" there is a youtube video and the two links below that as well have good information.
Answer #2DR.RECO from Reco's Renches, July 30, 2011, 23:43Journeyman
Hello it seems as if you have a fault in the differrential pressure feedback egr sensor that is causing the fault code p0401.I say change the DPFE sensor and then recheck the sensor voltage ref.HAVE A BLESS DAY from DR.RECO.