DTC B1304: Electronic Power Assisted Steering System: Description
WARNING: This page is about a different car, the 2014 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The PSCM will monitor the voltage supplied by the 12-volt battery and charging system and set the appropriate DTC when necessary.
DTC B1304:68 (Electronic Power Assisted Steering System: Event Information) - This DTC sets if the battery voltage falls below 11.5 volts for more than 1 second with the ignition ON and the engine speed above 500 RPM.