TESLA Warning
BMS-W034
BMS_w034_SW_Isolation_Sensor
Also written as BMS_W034 / BMS W034 / BMS_w034_SW_Isolation_Sensor / bms_w034_sw_isolation_sensor
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-W034 mean?
Tesla warning code in the Battery Management System (BMS) module. The Battery Management System (BMS) has detected that there is a high voltage (HV) battery isolation sensor error.
Original Description
The Battery Management System (BMS) has detected that there is a high voltage (HV) battery isolation sensor error.
Affected Tesla Models
Model SModel XModel 3Model YCybertruck
What You May Notice
- Battery management warning: The Battery Management System (BMS) has detected that there is a high voltage (HV) battery isolation sensor error.
- Charging speed may be limited or sessions interrupted early
- Reduced estimated range may appear on the touchscreen
How to Diagnose and Resolve
- 1 Perform a soft reboot: hold both scroll wheels until the screen restarts
- 2 Try a full charge cycle to recalibrate the BMS
- 3 If "The Battery Management System (BMS) has detected t" persists after reboot, schedule a Tesla Service appointment
- 4 Avoid DC fast charging until the issue is resolved
Severity Notes
BMS-W034 is a Warning in the Battery Management System system. Schedule service soon. Monitor your vehicle for additional warnings.
Other BMS Codes
BMS_a001 BMS_a002 Tesla alert code in the Battery Management System (BMS) modu... BMS_a003 Tesla alert code in the Battery Management System (BMS) modu... BMS_a004 Tesla alert code in the Battery Management System (BMS) modu... BMS_a007 Tesla alert code in the Battery Management System (BMS) modu... BMS_a016 Tesla alert code in the Battery Management System (BMS) modu... BMS_a017 BMS_a018
View all BMS codes →