I have a 2016 T-680 and I can't seem to get it to force regen.
I was on a half tank of DEF and filled up along with diesel. About an hour down the road my lights started going off. Then while waiting to be loaded I got a "Stop Engine Immediately, Do Not Run Engine or Damage Will Occur" notice in red. I turn off the truck and called a few friends.
I checked my KT Fault Codes and this was there:
"SPN-4094 18 NOx limits exceeded due to Insufficient Diesel Exhaust Fluid Quality"
The placed I filled up at was not any help. And the truck would only go so fast so I couldn't get anywhere in it. I managed to obtain a syphon and 2 boxes of DEF. And from there get the old out and some new in. Nothing was working, so I went to sleep and got towed to a shop in the AM.
The people at the shop said that the computer is not giving a reason as to why the light is still on and the truck still in Derate. Only that the DEF is low. That would be obvious since I only put the 2 cans in. I limped to the pump and filled the DEF all the way up. And still can't get any of this fixed.
I was told to try to get it to Force Regen but that is not working.
Any Ideas? I think I have no choice but to go to KW.
Pic of the dash before for going to shop.