Well I got the famous DEF see dealer for service message today. Supposed to take trip to NY tomorrow. Had a CEL with the code of P207F. DEF is near full, put new in about a month ago. Decided to clear code and drive on highway for about 30 miles. Message has since gone away and CEL hasn’t returned. I have no count down of XXX amount of miles. What do you guys think? It’s a 2014 Cummins with 69,000 miles.

Just an update to this issue. I have since driven about 100 miles and have had no codes or that DEF message appear on my dash. DEF system being a little picky I take?


Sent from my iPhone using Tapatalk