My car went to the dealership because Firestone couldn't work on the "dealer specific error". Firestone didn't charge us anything for the readout, since they couldn't do the work. So, when the dealer's service dept. read the code, they discovered it was a bad sensor in the cam shaft. As this was part of the drive train, which was still under warranty, they repaired it at no charge to us. Whew! A possibly big bullet dodged, right before Christmas.
There is no way I'll finish the little projects I'm working for coworkers, before Christmas. Oh well, they can be 12th night gifts.