Hit post on this, got the three dots blipping until the browser crashed. Anyway, just when I'd thought I had the 550 sorted for a while, I get this error (not my screen, I don't listen to Fox talk).

Looks like the steering angle sensor is the probable culprit? But there's no way to tell, really, until I take it in somewhere. It's blipped on once a day for the last three days, and I'm guessing it ain't gonna fix itself.