Particulate Trap Differential Eratic Pressure

Had a code come up twice now...Please define: "Particulate Trap Differential Erratic Pressure". What is it? What are known sypmtoms or causes? Also, found "inlet/outlet temperature on DPF shorted on Bank 2". Ideas?? Are these two related to each other? Have an exhaust leak too! Can't locate. Audible while using jakes and accelerating.

 

2008 Peterbilt 389 Cat SDP.

 

Thanks for the help. Looks to be the wire harness to the DPF is shorted. Oddly enough, the label on the harness is a Kenworth label. So, it's been replaced once before. I wonder why? Is it imperative to repair this part?

 

Beings it's on a Peterbilt with a Kenworth part, they must be interchangable? Caterpillar told me it's a Peterbilt part as they tested something and found a short for Inlet/outlet temperature on DPF shorted on bank 2 and told me to go to Peterbilt to get it replaced. How do I know if the module box is good or bad? If bad, i'll have to get this from Peterbilt or Cat? So, I'm looking at replacing one or the other or both then? My radaitor had a hole in it last week and ran out pretty bad. Would this cause these issues?

 

CAT told me i had a short on bank 2. So, do I need just one harness to correct the codes for "Inlet/Outlet Temperature on DPF Bank 2 shorted and "Particualte Trap Differential Eratic Pressure"? Or, are they two different separate harness'?