Ok story time. I tripped out when my truck said I had zero def recently when I woke up, it was sounding all alarms at me and I was like yooo wtf do I got a leak.
Then thought maybe it’s just big ice cube in there and the gauge can’t register. 
After some driving I was going nuts with the lights flashing, def alarms and derate warning blasting.
So I got def at the pump and that changed nothing, gauge still showed empty.
Now I’m pissed so was like I’m gonna show you Mr. DEF System so I went in to store to buy warm bottled DEF to melt that sucker in the tank and it did the trick.
So was all that “perfectly normal” for the truck to do that?
I’ve had many others trucks thoughout my career and that never happened until recently.
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