Taking it to the dealer this week - disconnected the battery for a couple hours to see if clearing the memory would help. It didn’t.
However, did find that I can get the error to show up and disappear at will. Punch it from 30 MPH -> 70 or so makes it show up. Drive slowly, under 20, for 30...
As much as the error itself intermittent (drive for 5 minutes, shows up, keep driving, goes away.) I think I'm onto something - ran BimmerLink and saw two codes:
But a search here dismisses them as fault codes that every car has at some point. Search continues.
So…why get rid of the 86 if you feel like the Supra is too much car for you? 86 is the perfect starter car, and it sounds like that’s where you’re comfortable.