BMS family
BMS_a039_SW_DC_Link_Over_Voltage
Unable to drive
What does the BMS_a039_SW_DC_Link_Over_Voltage alert mean?
The battery management system (BMS) has detected that there is an over voltage event.
What you'll see in your Tesla
- Unable to drive
- PULL OVER SAFELY
What triggers it
The BMS detects that the bus voltage is higher than maximum voltage threshold.
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+
Track your Tesla's alerts automatically
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.