[cas951]

Update: I threw in the towel and took it to the dealer. They performed a smoke test and determined these parts to be faulty/leaking so they replaced the following parts:
1. 996-201-221-07 ACTVD CARBN CO
2. 996-605-201-01 SHUT-OFF VALVE
3. 996-605-213-01 CARBON CONT VA
Codes were reset. After driving the car around for a few day (65 miles) the CEL came back on. P0455 and also a P0430. I'm almost certain these two are related.

I am bringing the car back to the dealer and need to be prepared with what they may claim.

Any advice ? Can an Evap leak cause the P0430? I'm also holding them responsible for the P0455 code.