Welcome Jason! Just stay on top of your maintenance and she should treat you good. Read around a little, we have tons of information that's great for a new owner.
http://www.trucktrend.com/news/1708-ram-launches-2018-harvest-edition-pickup/
For the 1500 Series, a 1 inch lift for more ground clearance is equipped from the factory. The harvest editions are said to be available for all powertrain configurations. Good news for us EcoDiesel owners.
The...
Perhaps some exhaust sensors got hit/broken on the exhaust? Just thinking out loud here since you have a DEF fault in the dash.
Welcome to the site. I'm sure we'll have some others reply soon.