BMS family
BMS_a018_SW_Brick_UV
Unable to drive
What does the BMS_a018_SW_Brick_UV alert mean?
The battery management system (BMS) has detected that a brick has fallen below the minimum brick voltage.
What you'll see in your Tesla
- Unable to drive
- PULL OVER SAFELY
What triggers it
The BMS detects that a brick fell below the minimum brick voltage.
When it clears
The BMS detects that all bricks are reporting acceptable brick voltages.
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.