BMS-W156
BMS_w156_SW_BMB_Vref_bad
Also written as BMS_W156 / BMS W156 / BMS_w156_SW_BMB_Vref_bad / bms_w156_sw_bmb_vref_bad
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-W156 mean?
Tesla warning code in the Battery Management System (BMS) module. The battery management system (BMS) has detected that there is a potential battery management board (BMB) hardware issue related to the ADC Vref. If this alert is present, the samples taken from the ADC by the BMS do not match, and there may be a reference issue.
Original Description
The battery management system (BMS) has detected that there is a potential battery management board (BMB) hardware issue related to the ADC Vref. If this alert is present, the samples taken from the ADC by the BMS do not match, and there may be a reference issue.
Affected Tesla Models
What You May Notice
- Battery management warning: The battery management system (BMS) has detected that there is a potential battery management board (BMB) hardware issue
- 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-W156 is a Warning in the Battery Management System system. Schedule service soon. Monitor your vehicle for additional warnings.