BMS-F129
BMS_f129_SW_BMB_VSH_Connector
Also written as BMS_F129 / BMS F129 / BMS_f129_SW_BMB_VSH_Connector / bms_f129_sw_bmb_vsh_connector
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-F129 mean?
Tesla fault code in the Battery Management System (BMS) module. The Battery Management System (BMS) has detected an issue with the Voltage Sensor Harness (VSH) connector on the Battery Monitor Board (BMB).
Original Description
The Battery Management System (BMS) has detected an issue with the Voltage Sensor Harness (VSH) connector on the Battery Monitor Board (BMB).
Affected Tesla Models
What You May Notice
- Red warning light on dashboard: The Battery Management System (BMS) has detected an issue with the Voltage Sensor Harness (VSH) connector on the Battery
- Vehicle may refuse to drive or charge until the fault is cleared
- Sudden power reduction or shutdown may occur while driving
How to Diagnose and Resolve
- 1 Stop driving immediately and move to a safe location
- 2 Do not attempt to charge the vehicle — active fault: "The Battery Management System (BMS) has detected an issue wi"
- 3 Call Tesla Roadside Assistance (+1-877-798-3752) for a flatbed tow
- 4 At the Service Center, Tesla technicians will inspect the HV battery pack and BMS firmware
Severity Notes
BMS-F129 is classified as a Fault, indicating a critical issue in the Battery Management System system. Do not continue driving and contact Tesla Service immediately.