2008 Prius. 101,000 miles. I just picked up an Automatic Pro to track my mileage for work. It's showing just one fault code for the car, P0AC1. Hybrid Battery Pack Current Sensor "A" Circuit Low. I can't seem to find any information on this code what so ever. The only modification done to the Prius is an aftermarket radio with a resistor wired in to appeas the car after removing the factory unit.