Diagnostic Aids

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

The hybrid/EV battery pack high voltage manual service disconnect is out, not installed correctly, or a blown manual service disconnect fuse may cause P0ABB and/or P0ABC to set.
The hybrid/EV battery pack high voltage manual service disconnect was removed, out of sequence, or was out during a service procedure with the 12 V battery connected may cause P0ABB and/or P0ABC to set.
The Hybrid/EV Battery Section Wiring Schematic in Energy Storage identify the battery section and voltage sense circuit terminal locations appropriate to each cell group.