Lat night, symptoms my Prius 2002 displayed after local deal replaced the 12V battery: Screen warning popped up with red triangle, saying "PS" then "main" with a battery, plus a "!" through car" icon. Also, power problem, hesitation. Since I picked up the car, I probably drove a total of ten minutes before this error message came on and I started having problem. Glenn (Prius with 2002 with 87,500 miles)
