Just my thought on the DEF issues. Maybe some guys let their rigs sit to long because not using with Covid issues. Might have caused DEF to go bad?? I drained all mine out and replaced with fresh. Just did a 6000 mile trip. Never let fuel get below 1/2 tank and refilled DEF with every fuel fill up. Didn't have any issues. Very thankful 2020 Anthem started out with 10,000 miles. Just my two cents.
Safe travels all
My 2018 Aspire has been down for 8 weeks and still no DEF parts available. The dealer can't even say when they expect the part. It is still under the emissions warranty but that does not seem to matter to them, Since it is part of the emissions it cant be overridden.
The coach has become a very expensive ANCHOR!
I talked with an owner who had the problem, He took it to a cummings dealer. They cut "some" wires and reprogrammed the computer so he could run it? Might want to call a cummings dealer. Good luck