I get it after doing a search. My father in law has one for his diesel I guess with the turbos it would be nice esspecially after towing. I wouldn't mind one either. I wonder if there is a ford one available. On the screen where it shows Trans temp. There is a blank menu it would be nice to add one there but I am not sure if that is possible?
What I'm worried about is what the 6.0L and 6.4L PowerStrokes were having with the EGR. There would be an overpresurization that would cause coolant to leak into the engine and cause damage to your engine before you got the CEL. Am I being too paranoid?
Too much fuel in a diesel increases EGT. Too much in a gas cools it, and eventually puts out the fire altogether, as a too rich mixture won't burn. Lean in gas will heat things up, but again, eventually you get a miss and you will get a CEL with rich or lean, as the oxygen sensors are always sniffing that out.
The owner's manual should advise on when you would get an CEL and why, and iirc, the flashing CEL means to shut it off asap.