[jeffba]

Originally Posted by mlh

He could have pumped DEF in his auxiliary tank and not his main. He went a hundred miles or so then transferred fuel to the main tank now both tanks have DEF in them. Then right after that it went through the system and caused the problems.
I wasn’t there I certainly don’t know what happened. The most likely answer is just like he said. If he did make a mistake he isn’t going to admit it now. Every body makes mistakes.
Lynwood

This is what I was thinking happened.

Just do not talk to me when refueling, hitching or unhitching.