I had considered that possibility from the start. When I checked battery voltage I made sure to check with the warning active to see if it was still seeing a charge....it was.
Although now I have a better testing device and see U012D: Lost communication with generator "A" control module, U024E: Invalid data received from generator "A" control module. And sometimes U0284: Lost communication with active grill air shutter. It appears these are related and on the same LIN bus and can cause errors.
I just need to figure the app out, Forscan Lite on Android, to monitor battery voltage.