u/Cut_over_pompanox

I have a question, about the def system. First I want to acknowledge I’m no where near as knowledgeable about vehicle’s in any shape or form, so forgive me inexperience on that front.

My question is, is there a way to definitively tell whether a def system has been deleted? When I first got my truck from a dealership, I noticed it was tuned at some point, telling from the knob there and some electrical components hanging from were the obd port is located, can’t see them now since I tucked them away. Truck has a cat and a DPF as far as I can tell, but I haven’t needed to put any def since getting it back in November, I’m just curious. I’ll be deleting it at some point so don’t know if it really matters. Truck is a 2016 Ram 3500 6.7L with the 68rfe if that helps.