BMS-F037
BMS_f037_SW_Pos_Contactor
Also written as BMS_F037 / BMS F037 / BMS_f037_SW_Pos_Contactor / bms_f037_sw_pos_contactor
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-F037 mean?
Tesla fault code in the Battery Management System (BMS) module. During the first two seconds of the contactors attempting to close, an issue with the positive contactor was detected. If this alert is present, the contactors may be heard attempting to close but remain open as the issue is detected. The speed of the attempt to close and the re-opening may be too quick to distinguish between the two clicks.
Original Description
During the first two seconds of the contactors attempting to close, an issue with the positive contactor was detected. If this alert is present, the contactors may be heard attempting to close but remain open as the issue is detected. The speed of the attempt to close and the re-opening may be too quick to distinguish between the two clicks.
Affected Tesla Models
What You May Notice
- Vehicle will not start — you may hear a rapid double-click then silence
- Tesla app shows the car cannot be woken up
- No power to drive systems despite 12V being healthy
How to Diagnose and Resolve
- 1 Try a reboot: hold brake + scroll wheels for 10 seconds, wait 5 minutes, try again
- 2 Check 12V auxiliary battery voltage — a low 12V can mimic contactor faults
- 3 If the vehicle remains non-operational after two reboot attempts, do not try again
- 4 Arrange flatbed tow to Tesla Service Center
- 5 Technician will test positive contactor resistance and replace if worn or stuck
Severity Notes
BMS-F037 is classified as a Fault, indicating a critical issue in the Battery Management System system. Do not continue driving and contact Tesla Service immediately.