Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
P305D
The ECM detects the DC/DC converter crank control is high when it should be low.
P305E
The ECM detects the DC/DC converter crank control is low when it should be high.