BMS-W152
BMS_w152_SW_pos_contactor_welded
Also written as BMS_W152 / BMS W152 / BMS_w152_SW_pos_contactor_welded / bms_w152_sw_pos_contactor_welded
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does BMS-W152 mean?
Tesla warning code in the Battery Management System (BMS) module. The battery management system (BMS) has detected that the positive contactor is stuck or welded. The BMS detects that the positive contactor is stuck or welded. This alert must be manually cleared. Inability to charge, drive, or support the low voltage (LV) system.
Original Description
The battery management system (BMS) has detected that the positive contactor is stuck or welded. The BMS detects that the positive contactor is stuck or welded. This alert must be manually cleared. Inability to charge, drive, or support the low voltage (LV) system.
Affected Tesla Models
What You May Notice
- Battery management warning: The battery management system (BMS) has detected that the positive contactor is stuck or welded. The BMS detects that th
- Charging speed may be limited or sessions interrupted early
- Reduced estimated range may appear on the touchscreen
How to Diagnose and Resolve
- 1 Perform a soft reboot: hold both scroll wheels until the screen restarts
- 2 Try a full charge cycle to recalibrate the BMS
- 3 If "The battery management system (BMS) has detected t" persists after reboot, schedule a Tesla Service appointment
- 4 Avoid DC fast charging until the issue is resolved
Severity Notes
BMS-W152 is a Warning in the Battery Management System system. Schedule service soon. Monitor your vehicle for additional warnings.