Exhaust Fluid Quality Poor Duramax, replaced egr - no light 3. No
Exhaust Fluid Quality Poor Duramax, replaced egr - no light 3. No mods. Dtc p205B and P0677 dtc. 2019 3500HD, Cclb, Drw, Deleted and Tuned, Wehrli turbo horn, intake, boost tubes, Banks idash, 1. JVFIX LLC 19. I replaced the upstream When the poor DEF quality message came on Sunday night, the temp was about 20degrees or maybe even a little above that. Shop already replaced the failing NOx sensors and filled the DEF tank with fresh fluid. Speed limited. 8L a action required exhaust fluid quality poor came up I replaced nox sensors now it say service exhaust fluid system, I have had the “Exhaust Fluid Quality Poor” signal come on multiple times and have had the truck in for repair. .