My wife's 2010 non-turbo has been intermittently showing warning lights and charging system failure messages. Yesterday it happened as I was returning home. I measured the voltage on the battery with the car running and the messages showing. Voltage was 13.8 . Every time this happens, I turn the car off and restart and it goes away. Battery shows 12.7 with car off. No issues starting, battery seems fine. It's also throwing a B1087 code, which is not well-defined.

Has anyone else seen this?