BMS family
BMS_a083_SW_Ctr_Close_Failure
Not Available
What does the BMS_a083_SW_Ctr_Close_Failure alert mean?
The battery management system (BMS) was unable to close pack contactors.
What you'll see in your Tesla
- Not Available
What triggers it
The BMS detects a condition that prevents it from closing pack contactors.
When it clears
The BMS detects that the condition clears.
Potential impact
Inability to charge, drive, or support the low voltage (LV) system
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.