Anyone have any issues with the Def system in a 2021 Ram 4500? Truck only had 1611 miles on it when it threw the DEF code and lost power. It’s been to the dealer 3 different times (each time picking her up because they couldn’t find an issue and she acted up again within 13 miles from the dealer each time). Now, dealer calls me and explains that they are taking her down to the pistons?? What does the internals of the block have to do with this DEF code?