TESLA Fault

BMS_f021

BMS_f021_SW_Dr_Limits_Regulation

System
BMS
Battery Management System
Type
Fault
Category
Battery
Severity
Fault (Critical)

What does BMS_f021 mean?

Tesla fault code in the Battery Management System (BMS) module. To protect the pack and bricks from overvoltage, undervoltage, and overcurrent conditions, this alert is caused by the following:Regen current is too high.Discharge current is too high.Pack voltage is too high.Pack voltage is too low.Brick voltage is too high.Brick voltage is too low.

Original Description

To protect the pack and bricks from overvoltage, undervoltage, and overcurrent conditions, this alert is caused by the following:Regen current is too high.Discharge current is too high.Pack voltage is too high.Pack voltage is too low.Brick voltage is too high.Brick voltage is too low.

Severity Notes

BMS_f021 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.