ECU replaced. Car running great. Smooth idle and good power.
Only about 20 miles under my belt so far though.
Repair ticket stated after talking with tech support, they found open circuit in ECU. So in my case, this seems to be a ECU hardware issue with unknown cause - could still have been software driving a device too hard, thus burning it up. Just speculating on that. So maybe if the circuit is not open, a flash is all that's needed in some cases.
13 days without car, time to have some fun!
Mike