Yes, the fans were cycling and every sensor was clicking. Oh, and the four-way flashers were non-op and buzzed when the door was opened. Later I presumed it was a fail-safe for the tech to remember that it was plugged in.
Thanks for the assistance. I found a post from 05 with the same symptoms. DR Subaru had suggested disconnecting a green 2-prong plug under the ds dash. Sure enough, disconnected it and the light is out and it's throwing no codes.