02 ranger 4L V6 EGR trouble code

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Mark Schofield - 08 Apr 2005 02:02 GMT

Well after 48000 miles the check engine light came on. I borrowed an OBD 2
scanner and got the code P0401 " insufficient EGR flow detected". I'm going
to start going thru the system tomorrow. Wires, vacume lines, ect. Seems
like there could be quite a few things that could induce this code. Any
suggestions on a troubleshooting routine or path to take as I start. Like
first this, then this, then this. Many thanks. Mark S.

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R. Mahone - 08 Apr 2005 20:34 GMT

I have a 02 ranger with the same engine....and had a check engine light come
on, my truck was still under warranty when it occurred, so Ford fixed the
problem. It was the Tube Mounted EGR Pressure Sensor (part # 9J460). And
after Ford replaced this item they extended the coverage for another 24k.
This was called program number 02M01. So maybe you can check with your
local Ford dealer...Good luck

> Well after 48000 miles the check engine light came on. I borrowed an OBD 2
> scanner and got the code P0401 " insufficient EGR flow detected". I'm
> going to start going thru the system tomorrow. Wires, vacume lines, ect.
> Seems like there could be quite a few things that could induce this code.
> Any suggestions on a troubleshooting routine or path to take as I start.
> Like first this, then this, then this. Many thanks. Mark S.

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Mark Schofield - 18 Apr 2005 22:53 GMT

I was lucky. It was the DPFE sensor which is covered under a special ford
program, at least for the 02. I did allot of troubleshooting and everything
pointed to that. The service writer said 80% chance that the sensor was the
problem, and it was. So it was a freebee. (This time)

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