DTC code PO401

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nek542@hotmail.com - 12 Nov 2005 17:07 GMT

I hooked up a code reader to the 2002 explorer with a V6 and it gave me
the above code. Does anyone know what the possible fix would be.
Replacing the sensor? Cleaning the valve? Something else?

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Happy Traveler - 13 Nov 2005 00:38 GMT

Insufficient EGR flow detected. 90% of the time it's a bad DPFE. You can
verify that with a handheld vacuum pump and a DVM, or just take your chance
and replace the sensor. Google the archives of this group for a lot more
information.

> I hooked up a code reader to the 2002 explorer with a V6 and it gave me
> the above code. Does anyone know what the possible fix would be.
> Replacing the sensor? Cleaning the valve? Something else?

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Jim Warman - 13 Nov 2005 01:19 GMT

Check with your local Ford dealer... there is a customer satsfaction program
that extends the warranty period on the DPFE sensor. IIRC, the program was
02M01 and extended the warrahty period to an additional 2 years or 40,000 km
in Canada... If you are the original owner or purchased the unit from a Ford
dealer, you should have received a customer notification letter...

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Gerald Riggs - 13 Nov 2005 15:03 GMT

And if you do buy a DPFE sensor check with Ford first. I just replaced this
on 2 vehicles and the unit from Ford was a newer design and a lot less
expensive (50%) than an aftermarket supplier. Very common problem.

>I hooked up a code reader to the 2002 explorer with a V6 and it gave me
> the above code. Does anyone know what the possible fix would be.
> Replacing the sensor? Cleaning the valve? Something else?

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nek542@hotmail.com - 14 Nov 2005 15:29 GMT

thanks for all of the advice. i am going by ford today to purchase a
new sensor...

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