Naked Prius Battery
#9
The positive posts are corroding causing a slight resistance in the battery which is pick up by the battery ECU which sets a code. I don't know if it's a US. recall but the training film was done by Toyota USA. Check with your local Toyota dealer.
#10
Yes this service campaign was done on US cars as well. I don't remember the campaign number but if it was done on your car there should be a sticker on the inside door jamb (front drivers side) indicating when it was done. Mailers went out to all registered owners affected.