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Looking at my MyChevy app's vehicle status for my 2020 Bolt, under "Diagnostic Information - Immediate Attention", there's a red exclamation item "Lithium-Ion Battery" with a code of 14_9999. This is a new item.

There's also an alert saying "Electric Drive Unit" with a code of 13_27; this one relates to when a couple nights ago I had shifted the car into reverse too quickly after powering up the car, and the shifting wouldn't work. This event has happened a couple of times in the past, but always resolves itself by waiting a while. Wondering if the battery warning is related to the drive unit warning. I only received the OnStar email regarding the drive unit, and that was immediate.

Update: So I pressed the OnStar button in the car, and with the free and limited service which Bolt owners have, I was able to ask for a diagnostic test, and the results came back quickly, that all is well with the vehicle. But they recommended I contact a dealer to have them look at the car.
 
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