I have the bypass installed but haven’t done the block off plates yet and haven’t had the codes reappear. I do plan on installing the block off plates, just letting those bolts soak in PB blaster.I found on another site that there are secondary sensors that will trip the cel if there block offs aren't installed, after the second cold start. I didn't test that out and installed the block offs, they were much easier to get to and install than I imagined. All in, about 2 hours working with my 8yo daughter.
We also got a trip in to the Georgia National Cemetery, it's humbling. Thank you to all who serve, served and supported them!