2020 kenworth t880 def level sensor replacement

This particular truck is a 2020 kenworth t880 day cab. Truck was throwing an scr fault code. It will eventually derate the truck. Def level guage was reading all over the place or it would stick on empty.
If you have a sleeper cab or something blocking the head space over the tank it will need to be removed and lowered down. Simply empty the tank. Disconnect all hoses and connection, unbolt and lower.
These paccar def level sensors are notorious for going bad. This video applies to other models as well.