BMS family
BMS_a021_SW_Dr_Limits_Regulation
Not Available
What does the BMS_a021_SW_Dr_Limits_Regulation alert mean?
The High Voltage (HV) battery drive limits have been exceeded by the system.
What you'll see in your Tesla
- Not Available
What triggers it
The battery pack current exceeds the maximum allowed by the Battery Management System (BMS) while charging or discharging.
When it clears
Pack current is reported below the maximum current allowed.
Potential impact
This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.
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.