Welcome. It seems like electrical for sure. Can you check all grounds and make sure nothing is off? Double check all connections to/from the ECM? Any work recently? Batteries testing good?
Welcome. It sounds like the Banks system is derating the power, likely a built in safety feature. Have you contacted banks to see if they can shed some light for you?
Welcome! Sounds like you take care of the truck.. I might suggest reading this section for some more tuning options.
https://www.ecodieselram.com/forum/forums/ecodiesel-performance.28/
Not necessary, but it's pretty much known the ecodiesel has more issues than any other modern diesel out there, period.
Will it affect you, I'm not sure. Drive the truck and enjoy it, and if you personally can't live with knowing the odds are higher on this truck breaking in comparison to...
Welcome to the forum! I'm pretty sure this thread is still relevant for the 2021: https://www.ecodieselram.com/forum/threads/ram-ecodiesel-oil-change-information.318/