Here is another tidbit for the Ram Mafia to chew on. Yet another possible recall ? http://www.reuters.com/article/us-fiat-chrysler-cummins-lawsuit-idUSKCN12A2LD
I had the DEF issue rear its head on me. I cleared the CEL and kept on driving. Its been several months and several thousand miles, many towing, and not a single problem. I'm not entirely certain what is causing the CEL to come on, but nothing bad has happened from simply clearing it and driving the truck like normal.