Code P1400 DPFE ???

[19XLS99]

Here is the deal, My crank broke with 41,519 miles 4.0 OHV (there is a previous Post about that if you care). Anyways I got my 99 XLS back together and it is running great, BUT the "service engine light soon" is on. So I went to a friend with a cheap OBD2 scanner and pulled a code, P1400 Manufacturer Aux Emissions Control.
I cleared the code and restarted the truck, It came back right away. My thinking is that when I had the engine upside down some Oil or antifreeze contaminated the DPFE. I replaced the hoses to the DPFE, They were starting to deteriorate and had crap inside.
So it runs fine but that bright yellow light hurts my eyes.
I spent every second of my freetime for a week replacing the crankshaft, So I'm really tired of looking at that 4.0 liter engine.
Any ideas before I spend another $60 on a part I may not need?

I'm going to try to get my crankshaft core ($55) by filing the end smooth so it looks like it did not snap off (you'd have to read my original post to know what I'm talking about)
http://www.explorerforum.com/forums/showthread.php?t=105824

 

[Glacier991]

You have one of three options here. Either you have a ground short, a bad DPFE, or a bad PCM. Doubt the PCM, the fact you were working around the engine makes a shorted wire possible, check the entire run, and last but not least, you could have a bad DPFE. That puppy DOES take a beating, so it's not unsual for it to go bad. But check your wiring first. Maybe a continuity check betwen ground and the wire might be a good idea, can be either wire, BTW. HTH

ps. Usually a DPFE error light does not affect driveability. I know, I drove 6 months with one. I knew what it was and was lazy. I should have put electrical tape on the light. (g). It isn't hurting anything.

 

[Oakheart]

Okay what is DPFE

 

[Glacier991]

Read this thread, it describes the EGR system and the DPFE

http://www.explorerforum.com/forums/showthread.php?t=80692

 

[Oakheart]

Thanks Glacier991 it was very informative. SInce mine is a 92 I can read the codes without a scaner right?

 

[19XLS99]

Well just I replaced the DPFE, reset the computer and ran the truck for 2 driving cycles, and the light came back on. $53 down the drain. I have to stay away from the Explorer right now cause I really want to smack it with a hammer
Any advice on checking for shorts would help
Thanks