TESLA Fault
BMS_f121
BMS_f121_SW_BMS_PCB_HumiditySens
What does BMS_f121 mean?
Tesla fault code in the Battery Management System (BMS) module. The Battery Management System (BMS) Printed Circuit Board (PCB) humidity sensor is giving an implausible reading.
Original Description
The Battery Management System (BMS) Printed Circuit Board (PCB) humidity sensor is giving an implausible reading.
Severity Notes
BMS_f121 is classified as a Fault, indicating a critical issue in the Battery Management System system. Do not continue driving and contact Tesla Service immediately.
Other BMS Codes
BMS_a001 BMS_a002 The Gateway packPerformanceDeviation config does not match t... BMS_a003 BMS was unable to read a pack birth date from the calibratio... BMS_a004 The pack hot seal test has not completed in the lifetime of ... BMS_a007 Charge rate is limited until cell temperatures increase... BMS_a016 The module IDs do not match the pack type set by the config ... BMS_a017 BMS_a018
View all BMS codes → Tesla alert codes sourced from the community-maintained Tesla Alerts Dictionary. This information is for educational purposes only. Always consult Tesla Service for official diagnosis and repairs.