2015 promaster 159" high roof diesel 600 miles on it check engine light came on code p2ba9 quality of def not sufficient. Took to dealership they tried to reset it but couldn't because scan tool did not have the functionality to do all functions for the promoter yet(scan tool just updated while I was there waiting still no functionality). Started a claim with Chrysler care. Tried to do a manual reset by draining defense by two gallons cycling key then adding a gallon and driving. Did not reset went to limp mode. Had towed back to dealership. They had to send out a field reports with an engineering level scan tool(one that never leaves the engineering floor). Field reports was flown in and had it reset but it took most of another day van was down a week which I was not happy about but dealership's did everything they could with little help from ram corporate. Was very pleased with both dealership s that I delt with. Customer care could be a little better at keeping customers in the know with what's going on. My only complaint really is that corporate has not prepared the software in the scan tool to be able to be able to deal with these yet and not gotten dealership training before launching the diesel.