HVBATT family
HVBATT_a058_BmbVrefBad
Unable to charge
What does the HVBATT_a058_BmbVrefBad alert mean?
Indicates a Battery Monitoring Board (BMB) reference voltage has continuously been out of bounds
What you'll see in your Tesla
- Unable to charge
- Service is required
What triggers it
Any BMB reference voltage has continuously deviated outside the in-bounds threshold of the nominal voltage
When it clears
All BMB reference voltages continuously remain within the in-bounds threshold of the nominal voltage
Potential impact
Other BMB voltage signals will be substituted given the reference voltage is unreliable
Affected models
Cybertruck
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Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.