BMS-F127
BMS_f127_SW_CPLD_CRC
Also written as BMS_F127 / BMS F127 / BMS_f127_SW_CPLD_CRC / bms_f127_sw_cpld_crc
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-F127 mean?
Tesla fault code in the Battery Management System (BMS) module. The Battery Management System (BMS) has detected that there is an issue with the complex programmable logic device (CPLD). If this alert is present, the CPLD may be broken. If it is, the contactor power should be disconnected for safety purposes.
Original Description
The Battery Management System (BMS) has detected that there is an issue with the complex programmable logic device (CPLD). If this alert is present, the CPLD may be broken. If it is, the contactor power should be disconnected for safety purposes.
Affected Tesla Models
What You May Notice
- Red warning light on dashboard: The Battery Management System (BMS) has detected that there is an issue with the complex programmable logic device (CPLD
- 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 that there "
- 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-F127 is classified as a Fault, indicating a critical issue in the Battery Management System system. Do not continue driving and contact Tesla Service immediately.