BMS-W023
BMS_w023_SW_Contactors_Open_HWOC
Also written as BMS_W023 / BMS W023 / BMS_w023_SW_Contactors_Open_HWOC / bms_w023_sw_contactors_open_hwoc
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-W023 mean?
Tesla warning code in the Battery Management System (BMS) module. The Battery Management System (BMS) has set this warning due to a hardware overcurrent (HWOC) event, which is preventing the contactors from closing. If this alert is present or is repeatedly setting, the BMS may be using it as a counter to record the number of overcurrent events that have occurred.
Original Description
The Battery Management System (BMS) has set this warning due to a hardware overcurrent (HWOC) event, which is preventing the contactors from closing. If this alert is present or is repeatedly setting, the BMS may be using it as a counter to record the number of overcurrent events that have occurred.
Affected Tesla Models
What You May Notice
- Battery management warning: The Battery Management System (BMS) has set this warning due to a hardware overcurrent (HWOC) event, which is preventing
- 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 set this w" persists after reboot, schedule a Tesla Service appointment
- 4 Avoid DC fast charging until the issue is resolved
Severity Notes
BMS-W023 is a Warning in the Battery Management System system. Schedule service soon. Monitor your vehicle for additional warnings.