RIP CM2250, 2013, 800,000km 20,000 hrs

[Hermjeji]

As you folks know, I live in Canada, so i'm fully mandated, and am trying to abide by the law here and keep this system on. I now have a brand new SCR as part of the campagin, the decomp tube was clean, and i got the stealership to run a doser pressure test for me (inline 6 is arriving anywhere between March 15 and May 15). I still get the following codes coming on intermittently for the aftertreatment system:

1. SPN 4363 FMI 3 - SCR outlet temp voltage above normal
2. SPN 4360 FMI 3 - SCR intake temp voltage above normal
3. SPN 4334 FMI 18 - DEF Doser absolute pressure low

I'm just starting to get my hand opened up with working on these, and without insite i'm a bit blind. I've got an exhaust leak on the outlet side of the aftertreatment injector exhaust pipe, so will be replacing that. But these codes keeping coming on and off intermittently. Going through quickserve, on all of these codes one of the comments at the bottom is to look at the OEM fuses/relays. Here's a photo of the one on the engine (the one in the cab didn't seem to have anything useful related to this), any tips on how to check these or which ones to replace related to the above?