appear new code P0401 after code P0106

5

Asked by Feb 04, 2017 at 10:25 PM about the 2009 Ford Explorer XLT 4WD

Question type: Maintenance & Repair

Ford Explorer 2009 4x4 XLT4.0L 6V
>>> (check engine light ON)
after computer test>>> was code P0106.
So i change
1: the EGR sensor,
2: MAP sensor,
3: car mechanic test Wires from EGR to Computer all good!!

after delete the codes, appear  new code P0401 ???
so where the problem now !!!????
please need a help !

3 Answers

112,395

What could cause the code P0401 - clogged or restricted EGR passages - faulty EGR valve - EGR valve stuck closed - problems with the DPFE sensor (Ford) - problems with hoses to the DPFE sensor (Ford) - problem with the EGR vacuum switching valve (Toyota) - clogged catalytic converter - carboned up EGR temperature sensor - vacuum supply issues at the vacuum-operated EGR valve - electrical problems with the EGR valve control circuit - engine computer problems

1 of 1 people found this helpful.
112,395

Ford: One of the common problems with many Ford vehicles that can cause the trouble code P0401 is a bad or damaged DPFE sensor (DPFE stands for Delta Pressure Feedback EGR). When diagnosing the code P0401 on a Ford vehicle, the DPFE sensor and the hoses to the DPFE sensor are usually tested first. The DPFE sensor and its hoses should hold the vacuum; the hoses should not be cracked or restricted. The sensor signal voltage should change when the vacuum is applied. Sometimes the DPFE sensor hoses could be reversed during a repair and this also could cause the code P0401. Often, replacing the DPFE sensor with an updated part could solve the problem, however, other components of the EGR system also need to be checked. This thread shows EGR system components in the 2.3L Ford Ranger. - The EGR valve could be sticking or the EGR passages could be restricted; both issues are very common. The EGR ports in the throttle body clog up very often too. If you are replacing the DPFE sensor, make sure the hoses are installed correctly and not crossed.

1 of 1 people found this helpful.
5

In Ford Explorer XLT 4x4 model 2009 ( 4.0L - 6V ) Where can i found the DPFE sensor (Delta Pressure Feedback EGR) ? see the pictures please and explain to me where can i found DPFE sensor throw the picture? I make colors in the picture to help us >>> Red arrow => EGR Green arrow => MAF sensor where is the DPFE sensor? near which color ?

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