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Thread: How To: P0401 EGR Fix

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05-10-2009, 10:08 AM

#10 (permalink)

leefpile

Junior Member

Join Date: May 2009

Location: kalamazoo, MI

Posts: 1

I have a p0401 code and I am losing my mind over this. I replaced the DPFE a few months ago when I first got the code. It came back now. I replaced the VAC control solenoid. The EGR valve moves what I think is properly with vacuum applied. The hoses from EGR tube to DPFE hold steady pressure. I have 5v on the BR/WH wire (VREF). I also have 5v on the BR/GR wire (DPFE)???
I take it that is bad since everything I have read is that I am supposed to be getting 1v +/_ .25v at rest.
Could my PCM be the culprit or should I just throw another DPFE in??

I forgot to mention, '02 Ranger 4.0 SOHC, 4x4 XLT, 65,440 miles.

Last edited by leefpile; 05-10-2009 at 10:10 AM.. Reason: Forgot vehicle info.

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