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I'm surprised you have been able to go thousands of miles without seeing this error message.  I see it quite often, whenever I turn the key with my left hand while my right hand is on the throttle or I try to accelerate too soon after turning the key, before the bike is ready.

In case anyone is curious about what happened next...

Sure enough, my brand new SR/S spent over 2 months in the shop before I ever got to ride it. They replaced the 12V battery under warranty, and the Zero factory rep stopped in to the dealer to make sure all the firmware was current and the bike was functioning properly.  They reportedly "wiped its brain" so completely that I had to bring in the yellow-headed key for them to reprogram the security settings so the computer would recognize the keys.

The dealer was kind enough to deliver the repaired bike to my home, but when I went to ride it the next day, it came up with error messages and refused to run: Error Code 25, 27, 28, 31, and 43.  I shook my head, turned off the key, and tried again a few hours later.  That time, the bike turned on enough that I could use the menu to individually clear each error code.  The Check Engine Light was still on, but I was able to ride the bike a few miles.  The next time I turned it on, the error codes were gone, and the CEL was off.  The dealer thinks maybe all the errors were in "pending" status and showed up reflecting the problems from before the battery was replaced.

Did I get a lemon?  It doesn't give me a warm fuzzy feeling, seeing all those errors and getting the impression that neither the technician at the dealer nor the Zero factory rep really understand how the bike works.  But wow, oh wow, when it works, this thing is a total blast to ride!

         - M

On Christmas day, there it was in my garage: a shiny new 2021 SR/S with a bow on it.  Wow!  Maybe someday, I'll get to ride it.

When I turned it on, the bike displayed Error Codes 27, 31, 33, and 43, along with a message about the 12V battery heater running and the voltage of the 12V battery being low.  It seems the dealer delivered the bike with the main drive battery charged to 97%, which perhaps isn't ideal for storage but should be able to keep the 12V battery charged for some time.  Let's face it, here in the Northeast with below-freezing temperatures and plenty of snow and ice, I probably won't ride much for a few months.

I tried to register the bike using the Zero app but kept getting an error message saying the unit was unrecognized.  (I guess the dealer forgot to tell Zero they sold it.)  I was, however, able to connect via Bluetooth and upgrade to the latest firmware.  Being concerned about some of the error messages, especially the one about the low voltage on the 12V battery, I left the bike sitting with the key in the ON position for about half an hour, then plugged it into a charging station for a few hours before using the Zero app to enable Storage Mode.

The manual gives conflicting advice as to whether the bike should be left plugged in while being stored.  So, I left it unplugged but checked back a week later.  Whoops -- totally dead!  Um, OK, how do I exit Storage Mode again?  Turn the key ON then OFF then ON again, while raising the kickstand and cycling the kill switch?  Nope,  nothing worked.  Eventually, I figured it was time to check the 12V battery and followed the instructions in the manual on removing it from under the seat.

When I first removed it, the voltage was 2.7V.  After an hour, it was up to 3.5V, and after a day, 6.5V -- all without any charging, just sitting in my basement.  Huh.  A note written with a marker on the 12V battery says it was new in September 2021, so this isn't the first time this brand new bike (built about a year ago but just sitting in a showroom) had such an issue.  I offered to bring the dead battery to the dealer, or let them use my garage to recharge or replace the battery, but they say Zero will only honor the warranty after bringing the whole bike to the dealer for service.

My situation sounds disturbingly similar to the one discussed earlier in this thread.  Maybe engaging Storage Mode was a mistake, or maybe it would have happened anyway.  I guess Zero has a problem with their firmware and their BMS where it just drains the 12V battery dead.  Only, neither I nor the dealer can update that particular firmware?  Moreover, Zero doesn't trust its customers or its dealers enough to honor a warranty claim without seeing pictures of the bike at the dealer being disassembled?

Oh, well.  Maybe Santa should have brought a LiveWire.  At least if my new SR/S spends 2.5 months at the dealer like the OP, it's a good time of year -- winter.

          - M