Poor Def Quality SPN 3364 FMI 2 DD15 Cascadia EVO 2014

That can totally be you’re one box and it’s failing internally..
but before that check the def bladder..
just make sure not to take it to fraighliner in Fort Worth TX they are known for being the worst fraightliner dealership when it comes to fixing def issues.. al they do is regen or scr test and that will cost 1700-2000 dollars.. you go down the road and the some problem is back .. make sure you take you’re truck somewhere better

 

I have same issue i was parked at home for 2 weeks started the truck everyday for about half an hr and the last time i did it asked me for regen after regen was done these codes came up how did you solve your issue?

 

I use DDDL and nexiq, everytime I go up the hill and it is hard defl low quality, ,scr nox conversion efficiency low comes up, I go to some quiet place to do a Regen or 2 and trying to wipe errors, after that driving for fine until getting high climb... And it repeats. Of you have trouble getting software and adapter - get a second speed sensor, not sure that it will work on the automatic transmission, but manual can connect a spare speed sensor instead of the installed one and get back to your shop, there will be no speed on dashboard, possibly lower power of engine but you won't need a road service or tow...