BMS family
BMS_w141_SW_12V_Pwr_Supply_Low
Power reduced - Unable to charge
What does the BMS_w141_SW_12V_Pwr_Supply_Low alert mean?
The battery management system (BMS) has detected an issue with the low voltage (LV) power supply to the contactors.
What you'll see in your Tesla
- Power reduced - Unable to charge
- Service is required
What triggers it
The BMS detects that the input voltage from the LV system is too low.
When it clears
The BMS detects that the input voltage from the LV system is within nominal range.
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.