The wife came home the other day with an Engine malfunction, reduced power message. Pulled the codes and there were 16 present at the time. We've known for a while that we have a faulty upstream NOX sensor. I've spoken to at least 15 specialty shops in 2 different provinces and can't find a single one willing to tackle an SCR/DPF/EGR delete. So I'm at the point I'm just going to change the sensor. But there's more issues as well here.

Cleared the codes and checked them again today and 10 codes came back.

4BDC - Fuel Vorfoerderdruckregelung performance fuel pump too low for
current delivery pump
4BDA - Fuel Vorfoerderdruckregelung performance fuel pump too low for current delivery pump
4BF5 - Too long invalid NOx sensor upstream of the DeNOx catalyst NOx signal
4BC2 - Air flow meter signal
4831 - Intake air temperature sensor
4BC6 - Intake frequency to low
A559 - Shutdown (Instrument Cluster)
9E77 - Normalize Error (SEATS)
A6D1 - Short circuit to positive or open circuit - additional water pump (Junction Box Passenger)
AA11 - Unknown Fault (Flexible-Bus Interface)

Wondering if any experts out there can help diagnose what I need to order for parts.