SES probably doesn't come on with UE2 tune.

I just deleted SAP and am wondering if I should delete post cat o2 sensors as well.
Not sure if it changes anything at all, either way?

The reason I'm considering deleting rear o2 sensors is because bmw scanner 1.4 is displaying shadow errors for them, which kinda bugs me, and I cannot get rid of the them.
I know andrewwynn is aware of those stubborn codes