BMS family
BMS_w168_SW_Uncontrolled_Regen
Service is required
What does the BMS_w168_SW_Uncontrolled_Regen alert mean?
The battery management system (BMS) has detected an uncontrolled regen event.
What you'll see in your Tesla
- Service is required
- PULL OVER SAFELY
What triggers it
The BMS detects regen power is above the maximum threshold while in drive.
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.