I just wonder if there is any way to monitor the dosing of DEF using the ScangaugeDEF chrystalizes if it doesn't flow adequately. The DEF system is controlled by a closed loop based on an NOx sensor reading after the Catalytic Converter. If this reading is incorrect, DEF flow can be curtailed and chrystals form in the DEF pump, lines, and injector which will cause the EVIC warning. I am of the belief that it all stems from a bad Cat. The Cat replacement ultimately cleared all my issues after the pump and injector replacement.
I haven't found any Xgauge codes for it. Its not in the list of standard parameters.I just wonder if there is any way to monitor the dosing of DEF using the Scangauge
Your owner's manual has a spec. for DEF. As long as the DEF you used has the same spec on the box, you should not have an issue. If the spec #s match, go above the dealer with your issue. Jeep HQ has been helpful to me on another issue.took 2014 grand cherokee to dealer was told need exhaust pump and injecter,but not covered by warranty because i used PEAK DEFF BLUE witch is up to jeep specs and will be 3000 dollars anybody else have this problem