I ran into a problem with my 2021 EcoDiesel (Service DEF System See Dealer warning) which includes the Eng Maint light. It eventually turned into the “Engine Will Not Restart in 200 miles” warning. My nearby Ram dealer is not impressing me with their vast knowledge of troubleshooting. They’ve had it for a week with NO solutions on troubleshooting the DEF system. Like you, you don’t want a mechanic say every part in the truck needs replaced as compared to actual troubleshooting. If I dont have an extended warranty is there anyone you can call at Ram to discuss an engine problem to verify a dealerships service dept are diagnosing it properly?! What do dealers do when the service dept is stumped? I’ve called third party shops in town and almost all don’t touch ecodiesels. I would really appreciate you’re thoughts.