this post was submitted on 16 Mar 2025
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Cyberstuck
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I know it’s fun to hate on the CyberTruck (absolutely has deserved it), but I’d bet money on this being a 12v battery issue, maybe from improper storage? Only reason I say this is that I have a Kia Soul EV and it gave me pretty much the exact same warning the other day and refused to start. Turned out the 12v battery was dead and that causes all kinds of weird stuff to happen to the electrical systems in the car. Especially considering that the entire electrical system of the CT is consolidated into one wiring harness.
Also, knowing Tesla, attempting to jump the 12v would probably void a warranty.
With modern cars having so many sensors, a dying battery can cause all sorts of weird, seemingly random issues. I have no idea it's the problem here but it's usually one of the first things I check when an issue isn't obvious. Just because the battery starts the car (or does whatever it does in evs) doesn't mean that the sensors, relays, and servos are getting the juice they need to operate correctly.
The cybertruck is a 48v car with a lithium ion battery, not SLA. It's not as likely to have a problem like a 12v SLA sitting too long.
It actually has 2 of them as well, altbough one is smallsr. Its a redundant back up for the steer by wire system in case 1 fails.
Most electric vehicles are required by law to lug around a standard 12V battery even though it's redundant to the 30-60kw battery pack powering th le rest of it. And they'll typically cheap out and go with a lead acid battery. On the upside they'll often wire the vehicle to keep the starter battery topped off so the car actually starts, so those starter batteries tend to last much longer than they do in ICE vehicles
The law is probably about a 2nd battery for specific systems, not that it has to be a 12v, it's just that up until now it's all been 12v.
Many EVs do have a 12V. I have a Hyundai Ioniq 6 and they are known to have ICCU failures which cause issues that look exactly like this.
Edit: the cyber truck apparently doesn't have a 12V but rather a 48V system. I'm not sure if this same issue or a similar one is happening, or something else entirely.