Egr
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
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From: MI
The TPS has nothing to do with the EGR. When those start to go , you no it right away . It will shift funny. Over rev - Sh^t like that will start to happening and you get a check engine light right away..
Member
Joined: Jun 2007
Posts: 42
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From: South Georgia
So the TPS wouldn't cause a 401? The way the Hayne's book reads, the EGR system works off of all those sensors to determine how the system will operate, TPS, MAF, IAT, just to name a couple. Guess I'll start with the DPFE sensor and go from there.
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
There are two different syles of DPFE sensors depending on the mounting method for that particular engine.
One is tube mounted, the other is screwed to something then connected to the EGR sample tubes with hoses.
Now you have pictures of both styles.
Steve
One is tube mounted, the other is screwed to something then connected to the EGR sample tubes with hoses.
Now you have pictures of both styles.
Steve
Thread Starter
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Member
Joined: Aug 2004
Posts: 15
Likes: 0
Dpfe
Originally Posted by countryboy241
I've been getting the same 401 code on my 02 4.6. I cleaned the inlets in the intake manifold/throttle body. Thought that would do the trick but it came back with the same code. I followed the directions in the Hayne's book and checked the DPFE sensor and EVR regulator voltages, and they were all normal. The DPFE sensor is in a different location on my truck, it's right on top of the EGR tube, and is a lot smaller than yall's picture.
Thanks
Doug S.