Question about the new DEF systems on the 2024 trucks

We just got a 2024 Freightliner Cascadia in the shop, and the DEF system is totally different from the 2022 models. The filter housing is now a single unit, and the dosing valve is integrated. It took us a full day to figure out the new diagnostic codes, which was a pain. Has anyone else run into this, and what's the best scan tool for these new setups?

3 comments

3 Comments

juliaa251mo ago

Nope. I read somewhere the new integrated units are prone to clogging faster. That scan tool question is a good one.

andrew_kelly3mo ago

Our 2023 Pete had a similar surprise with the DEF heater lines.

reese_perry63mo ago

Yeah, @andrew_kelly, mine did the same thing last winter.