Code 3567 and derate.

[Rawze]

3567 is saying the DEF doser injector is unplugged. If it is inactive then clear all the faults and se if it comes back. If it does then it can the doser injector going bad.. but is more likely to be a wiring harness/connection issue somewhere.

BTW: There are typically 2 doser injectors in most aftertreatment systems. One is behind the turbo to put FUEL into the DPF to clean it... and another one to inject DEF FLUID into the Decomp tube to make tyhe SCR element function properly.