99 ford ranger P0401 replaced everything still get code

99ranger · **Joined:** Fri Dec 12, 2008 11:03 pm **Posts:** 3

I have a 99 ford ranger V6 3.0L 2WD flex fuel. I have replaced the exhaust manifold tube, hases from tube to EGR sensor, Sensor, EGR valve, and I have taken off the throttle body and upper intake then cleaned it all out. I still get the code. I am out of ideas does anyone have and ideas? please help

Sponsored Links · **Joined:** 29 Jun 2004 08:12 pm **Posts:** N/A

asecmt · **Posted:** Sat Dec 13, 2008 9:08 am

Where did the DPFE (egr sensor) come from? There is a vacuum regulator that supplies vacuum to the valve have you checked that?

99ranger · **Joined:** Fri Dec 12, 2008 11:03 pm **Posts:** 3

I bought the sensor from Auto Zone. I just picked up the regulater vavle today I am going to try it. Thanks I will post back. I checked the vaccum pressure to the EGR valve and I barley get a reading. I think you might be right about the regulator valve or maybe there is a leak in the tube.

asecmt · **Posted:** Sat Dec 13, 2008 8:53 pm

The regulator does not produce much vacuum the egr does not need that much to open. I would return that P.O.S part to Auto Zone and go to the dealer and get the DPFE from them. Aftermarket units do NOT work.

99ranger · **Joined:** Fri Dec 12, 2008 11:03 pm **Posts:** 3

Replaced the vaccum regulator and problem solved. I will keep the part thing in mind but for now it works and I can get it inspected thanks again.

asecmt · **Posted:** Mon Dec 15, 2008 9:48 am

I would keep your paperwork for the parts from autozone it will be a matter of time

FergusonTO35 · **Joined:** Mon Sep 08, 2008 9:35 pm **Posts:** 154

We need to say a big thanks to the Zone for generating so much traffic to this site!!

baileycp · **Joined:** Fri Dec 19, 2008 9:52 pm **Posts:** 2

I realize I'm just a girl but I have a 2000 Flex Fuel Ranger and had the same problem...changed all the same stuff (well, didn't take the manifold apart but did everything I could safely do with the book and online assistance)...I'd get the code out for a day or two and then BLAM...Something real simple fixed mine...put a new unibelt on. And not the cheap one either. Go ahead and buy the expensive one because it may just save you some bent valves in the future.
Anyway, put that new belt on and drove it for a few days and could tell there was already a difference with the new belt so it musta been BAD...got the OBD out and cleared it out and then got P14000--generic code--about 3 times and on that last reset it didn't come back on. May not work for you but its worth a shot probably.

99 ford ranger P0401 replaced everything still get code

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