Hello all, I need some advice/help, my 2018 diesel cruze manual 6 speed regen system is not functioning at this time. Several mechanics have stated this. I know I have a NOX sensor not functioning, would this cause the total system sensors to all read in the negatives? I have other diesels but none of those have the def system. I have codes for the regen system. Some input would be helpful cause both mechanics said it would take a bit to find the issues. Thank you all so much