My '04 545 w/ active steering has been doing the same thing off and on for over a year. I am not actively trying to fix it . . . just living with it. However, one of the scans showed low voltage in a servo motor that's part of the active steering. An indy mechanic explained that active steering and DSC systems talk to each other, so the DSC error could actually be triggered by an active steering problem. Like the other posters, my messages are either DSC error or DSC inactive.