BMS family
BMS_w021_SW_Dr_Limits_Regulation
Not Available
What does the BMS_w021_SW_Dr_Limits_Regulation alert mean?
The battery management system (BMS) limits power because the pack current, pack voltage, or brick voltage, is outside of the expected bounds.
What you'll see in your Tesla
- Not Available
What triggers it
The BMS detects that regen current, discharge current, pack voltage, or brick voltage is too high or too low. Alert log signal data provides information on the specific condition(s) detected.
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 S 2012-2020
Model X 2015-2020
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.