BMS family
BMS_a140_HW_BMB_Status_Fault
Not Available
What does the BMS_a140_HW_BMB_Status_Fault alert mean?
The battery management system (BMS) detected a condition that indicates a BMB device fault.
What you'll see in your Tesla
- Not Available
What triggers it
Any BMB device in the daisy chain reports any of the monitored fault indicators.
When it clears
No BMB devices in the daisy chain report any of the monitored fault indicators.
Potential impact
This alert is primarily informational, and may indicate a potential BMB hardware failure that results in unreliable measurement data.
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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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.