BMS-F043
BMS_f043_SW_Watch_Dog_Reset
Also written as BMS_F043 / BMS F043 / BMS_f043_SW_Watch_Dog_Reset / bms_f043_sw_watch_dog_reset
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-F043 mean?
Tesla fault code in the Battery Management System (BMS) module. This alert is expected any time the module has been reset. If the module was deliberately reset and this alert is present, no further action is required. If the module was not reset deliberately, pursue possible causes to investigate further.
Original Description
This alert is expected any time the module has been reset. If the module was deliberately reset and this alert is present, no further action is required. If the module was not reset deliberately, pursue possible causes to investigate further.
Affected Tesla Models
What You May Notice
- Alert may appear after a service visit or software update
- Vehicle usually continues to operate normally
- May clear on its own without any action
How to Diagnose and Resolve
- 1 If the BMS module was deliberately reset (e.g., by Tesla Service), this alert is expected and will clear automatically
- 2 Perform a reboot: hold brake + scroll wheels for 10 seconds
- 3 If the reset was not intentional, check for other active alerts
- 4 Monitor for recurrence over the next few days
- 5 If alert appears repeatedly without explanation, schedule a Tesla Service appointment
Severity Notes
BMS-F043 is classified as a Fault, indicating a critical issue in the Battery Management System system. Do not continue driving and contact Tesla Service immediately.