Last night I replaced my FPR to fix a hard-to-start problem. It seemed to fix it, however my wife calls me at work today and says that the car idled funny at first and brakes felt mushy and made a squeel as she backed out of the driveway.
The problems went away but I had this U1064 - Loss of Communications with DIM code in history. Anyone see a connection here? I'll check my codes periodically to see if it returns.

I've got that code in history on my car as well. It's a Communication's error. If you disconnected the battery while changing ther FPR, that might have set it. I knwo that when I had a loose battery terminal, it would throw that code every so often.