I Bought my 2001 about 4 months ago it has 120k miles.
It has an edge attitude.

Fit went into limp mode about 6 weeks ago but I didn't know what was going on.
I had very low fuel pressure coming from the in tank lift pump so I figured the vp44 got smoked.
I just replaced both pumps with thourobred diesel Air Dog Raptor and reman. Vp44. Still have same problem. And my raptor is delivering a solid 14-15 psi. Its adjustable but I havnt turned it up any yet.

Two or three times since I went into limp mode the truck came back to life with full power for a minute or two.

Im getting 0237 code. And my edge display shows 0 boost. Engine light is also on.
Wastegate or turbo sensor?

 

I believe the MAP sensor has failed. They're not cheap but you can find them at various performance diesel venders for less than the dealer.

 

http://www.genosgarage.com/prodinfo....5#.VCjo5Enn-00

Would this be the part?

 

Thats it. But disclaimer..... I'm not saying definitively this is the problem. The code description is "MAP SENSOR VOLTAGE TOO LOW" but because you have an aftermarket device (the Edge), I'd suggest disconnecting it first and seeing if the problem goes away, or comes back. And I'd also suggest Googling https://www.google.com/search?q=0237&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-USfficial&client=firefox-a&channel=rcs#rls=org.mozilla:en-USfficial&channel=rcs&q=dodge+cummins+code+p0237 and reading what others have found or done to solve their problem. It may just be a bad MAP sensor but I'm just trying to save you some money if its not.

 

Thanks