I did, but from the local O'Reilly's. I got the same P115A code that McDonaldD got in the referenced post. There's no DTC listed according to them. Hell, the all holy Google only brings back that post when I search p115a BMW.

The local indy wants 89 bucks to hook it up, and I'll probably end up there, but I'm just trying to knock out the "easy" stuff - what might I have done wrong - beforehand.