Code P0401

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Aug 3, 2008 | 04:36 PM

rickyjperez

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Code P0401

I have a 2000 ford expedition and I have replace all gaskets in the manifold and check engine light still comes on, I have replace all egr part except for the egr position sensor. Does anyone know if that goes out as my check engine light stays on

Aug 4, 2008 | 11:18 AM

pdqford

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From: Central NYS

Quote:

Originally Posted by rickyjperez

Does anyone know if that goes out as my check engine light stays on

What code, if any, is currently set?

Aug 4, 2008 | 11:37 AM

rickyjperez

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The code is P0401

Aug 4, 2008 | 11:43 AM

kailor

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From: huntsville, alabama

P0401 Insufficient EGR Flow.
I would completely remove the throttle body and clean all ports out.
I would also check for a cracked elbow (trace from pcv valve to back of intake/throttle body) behind the intake manifold.

Aug 4, 2008 | 11:45 AM

pdqford

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My guess would be the DPFE, but depending on the miles on the vehicle you may have some carbon build up in the EGR passages.

But wait! You had the intake off to replace the gaskets: how did the EGR passages look?

Aug 4, 2008 | 11:48 AM

rickyjperez

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it was clogged and we cleaned off and already replaced the DPFE

Aug 4, 2008 | 01:07 PM

KingRanchMan02

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From: Louisville, Kentucky

This thread is a good discussion on the P0401 DTC. Also, do not use aftermarket DPFE sensors. Motorcraft only as the aftermarket ones do not get updated like the new parts from Ford. Good luck!