UnsungZero_OldTimeAdMan
Well-Known Member
FWIW, I’ve heard the whine before upon wake. So when you reconnected the ground cable you might have triggered the same. It was likely fine and would have subsided one you drove a bit. The reboots you did, I hope they were not hard reboots. Read somewhere that you are not supposed to do that more than once within an hour. Don’t recall reason. With my previous car, X5, upon reconnecting battery I’d get all sort of errors, including one for transmission. That was considered normal and would self clear after a few minutes of driving. I think it’s just the process if various computers “waking”.
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