Th DEF System is a Federally mandated system and should be covered by the Federal Emission 8yr/80,000 mile Warranty. The cost to repair the DEF system doesn't support its purpose. Personal vehicles with DEF have no true positive impact on the environment or performance. My actual experience is about a 25% increase in fuel usage that is more harmful than using much less fuel. I average 11 mph pulling my trailer and could get 3-4 mph improvement (estimate) without the DEF system. Also, I could buy an older truck and not be required to have the DEF system. That might be my next option.

My problem happened on a Friday night when my wife and daughter were taking horses to an event over 180 miles from my house. The truck fault message for Service DEF System Take to Dealer truck will be limited to 5MPH in 100 miles. The DEF system failure shouldn't put my family and animal at risk. I had to take a second vehicle to get my animals and family home. Once the weight of the trailer was off the truck, the system fault was reduced to perform service and we were able to drive the truck home. The estimated cost to repair exceeds the cost to delete the system. What would you chose to do?

After 3 check engine light warnings that could not be figured out by two different dealers (just reset). They completely replaced the entire DEF system and exhaust under warranty at 25,000 miles. Recently another check engine light appeared at 54,000 miles. Now returning to dealer again.

Code reader I bought reports Code P20E8 - Reductant Pressure to low. Reported fix = Replace Redundant Pump for $2,140.00 (dealer estimate)! However, part is back ordered with no arrival estimate in sight. Must be an item in high demand, . . . Hmmm

Truck is warning me it will automatically shut down to 5mph in 100 miles unless fixed. Basically, the truck is indefinitely out of service at the dealer. This also results in shutting down my business because I can not not tow my utility trailer to meet current contracts.

This is my second Dodge truck. The first one a 2010 crew cab short bed diesel had similar exhaust issues but no Def system back then. I see a trend here, no more diesel Dodges for me! The Cummings motors may be great but everything else strapped to the motors kinda makes them useless and unreliable. It's gone as soon as I can pay it off.