DTC B1304: Electronic Power Assisted Steering System: Description
WARNING: This page is about a different car, the 2013 Ford Mustang. 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 11.7 volts for more than 1 second with the ignition ON and the engine speed above 500 rpm.