BMS family
BMS_w153_SW_neg_contactor_welded
Not Available
What does the BMS_w153_SW_neg_contactor_welded alert mean?
The battery management system (BMS) has detected that the negative contactor is stuck or welded.
What you'll see in your Tesla
- Not Available
What triggers it
The BMS detects that the negative contactor is stuck or welded.
When it clears
This alert must be manually cleared.
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.