I have a 2016 Ram 2500. Recently filled DEF tank at a truck stop in Kansas and about 80 miles down the road I received warning messages that I had bad DEF. Took truck to local dealer who said DEF sensor was good. They partially drained my tank and refilled now all is good. But I contacted truck stop and they sent me a report showing their DEF was good and they claim sensor can be good and still send the “bad DEF” messages. Anyone know anything about this?