Post subject: 99 Ford Ranger 2.5L P0402 excessive egr
Posted: Thu Jan 29, 2009 7:39 pm
Joined: Thu Jan 29, 2009 7:22 pm Posts: 2
My egr valve doesn't hold vacuum. I thought P0402 excessive egr meant the egr was possibly sticking open. Could it be that simple replace egr valve clear code fixed?
UPDATE I have a bad vacuum pump EGR diaphragm is fine.
Post subject: Re: 99 Ford Ranger 2.5L P0402 excessive egr
Posted: Fri Jan 30, 2009 5:55 am
Joined: Tue Jun 17, 2008 7:06 pm Posts: 714 Location: Atlanta GA
Replace the DPFE sensor with one from the DEALER. The code is for egr flow excessive but the problem is ford uses this sensor to detect and monitor egr flow, and the voltage gets out of range or too high at idle and the pcm detects what it thinks is egr flow when there should not be and sets the code.
Post subject: Re: 99 Ford Ranger 2.5L P0402 excessive egr
Posted: Mon Feb 23, 2009 2:22 pm
Joined: Thu Jan 29, 2009 7:22 pm Posts: 2
I have replaced the DPFE with the dealer part but after clearing the code I still have 2 incomplete monitors evap and catalyst. I should have noted on the original post along with the P0402 code evap was incomplete. I'm not sure if I've completed the drive cycle.
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