What Happens When You Run Out of DEF?

[speedracer67]

Filled my 2015 Ram 3500 def tank until it overflowed and then ran it about 2 weeks maybe 2500 miles and it never moved. Finally it slowly started going down. Don't think the gage is real accurate.

 

[MADDOG]

Well, you overfilled it. I wouldn't expect it to move much either until the level dropped to the point the sensor could measure it.

 

[cnovel]

My gauge stays on empty , of course because I took all of that off ! Makes no sense to **** soot back in an engine , for the price of the 65,000 egr , dpf , clean and whatever else , you can delete all, new exhaust , dpf gone, egr gone, egr cooler gone , some tunes and it runs like it should , 17-18 city , 21-23 Highway , hills , mountains , are different but don’t have to buy that crap anymore

 

[MADDOG]

My gauge stays on empty , of course because I took all of that off ! Makes no sense to **** soot back in an engine , for the price of the 65,000 egr , dpf , clean and whatever else , you can delete all, new exhaust , dpf gone, egr gone, egr cooler gone , some tunes and it runs like it should , 17-18 city , 21-23 Highway , hills , mountains , are different but don’t have to buy that crap anymore

Yeah...I don't have to buy that crap anymore either.