That’s a strange one.I know this is a zombie thread and traditional forum etiquette dictates that one should let it die, however after having received the DIC ultimatum to refill my DEF tank, I dumped a 2.5 gallon jug of DEF from O'rely's into the tank. I did not at the time know that it is a 5 gallon tank. Next day, seems all is good. Def ok went for a longish drive and shut her down. Today I get the fill DEF warning and a check engine light. Hoping to finish my refill at the Pilot truck stop tomorrow.
Good to hear.It figured it out after driving around a bit. I added another jug anyway, but all the warnings and the check engine light went away.