BMS-F124
BMS_f124_SW_BMB_Comm_Integrity
Also written as BMS_F124 / BMS F124 / BMS_f124_SW_BMB_Comm_Integrity / bms_f124_sw_bmb_comm_integrity
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-F124 mean?
Tesla fault code in the Battery Management System (BMS) module. The Battery Management System (BMS) and the Battery Monitor Boards (BMBs) are not communicating as expected. The BMS constantly sends a message on the daisy chain for each BMB, and it is expected that every BMB will respond. If this alert is present, there have been more than 10 errors detected per second.
Original Description
The Battery Management System (BMS) and the Battery Monitor Boards (BMBs) are not communicating as expected. The BMS constantly sends a message on the daisy chain for each BMB, and it is expected that every BMB will respond. If this alert is present, there have been more than 10 errors detected per second.
Affected Tesla Models
What You May Notice
- Red warning light on dashboard: The Battery Management System (BMS) and the Battery Monitor Boards (BMBs) are not communicating as expected. The BMS con
- 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) and the Battery Monitor "
- 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-F124 is classified as a Fault, indicating a critical issue in the Battery Management System system. Do not continue driving and contact Tesla Service immediately.