egr problems

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Sep 5, 2003 | 11:54 AM

seumas

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egr problems

Hi There
I have been playing with my Egr system for about 2 months now and I am still geting egr system fail codes P0400.
I have changed the egr valve, evr, and the dpfe sensor including new vacumm lines to no avail. The check engine light keeps coming on. I have talked to the fellas at the dealership and they do not know what is keeping the light on Any thoughts on this? It is a 97 mazda 4ltr 6cyl 5spd 2wheel drive
Thanks Dave

Sep 5, 2003 | 08:39 PM

Ken00

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Joined: Dec 2001

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From: South Jersey

egr problems

Are you sure the exhaust gas path is clear?

Sep 6, 2003 | 11:32 AM

seumas

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egr problems

thanks for the reply. Is that the whole exhaust or just the pipe that it is in?
Thanks for the info
Dave

Sep 6, 2003 | 07:17 PM

Ken00

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Joined: Dec 2001

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From: South Jersey

egr problems

Just the pipe/etc for the EGR system.

Sep 7, 2003 | 02:50 AM

Mike W

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Joined: Apr 2002

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From: Central Kali

egr problems

I get a P0401, insufficient flow. I reset and it came back 35 miles later. I will let you know what I find out. 01 4.0 sohc.

Sep 9, 2003 | 01:33 PM

seumas

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egr problems

I got the pipe changed today and the code reset and pulling in the driveway the lights back on. Will get the code checked tomorrow. One of the guys at work was saying that the neutral safety switch is tied into the system some where. Mine is broken. Has anyone ever heard of this before? The switch is on the top right shifter rail on a mazda 5sp trany. It is right across from the back up light switch.
Thanks Dave