The reflash was insanely easy. Now, after reading my ECU I see there's a PO420 code. I have 3 options...
1) New catalytic converter. Yeah, no.
2) O2 bung. I wonder if the smog technician will open the hood and inspect it. I haven't had a chance to really see where it is or if it would be obvious. Does have a picture of where exactly it's located?
3) Citric acid wash. I've done this before and it works incredibly well. Cat soup anyone?