I had that happen while driving - making a right turn. All power was gone, similar message, electricity was still on. I hit the start button 2 or 3 times to reboot and it fired right up and kept going. Never happened again. I just chalked it up a piece of code that hadn't been written properly and only happens under a relatively unique set of circumstances.
Thinking about it though, the car did throw a CEL 1500 miles and many months later that required a new sub harness near the battery tunnel and a system update and IIRC there was a TSB on it. I don't know if the two were related, but the car runs fine.
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