BMS-A162
BMS_a162_SW_No_Power_For_Support
Also written as BMS_A162 / BMS A162 / BMS_a162_SW_No_Power_For_Support / bms_a162_sw_no_power_for_support
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-A162 mean?
Tesla alert code in the Battery Management System (BMS) module. BMS does not have enough power to provide 12V support BMS detects one DC and one FC contactor is welded
Original Description
BMS does not have enough power to provide 12V support BMS detects one DC and one FC contactor is welded
Affected Tesla Models
What You May Notice
- BMS-A162 may appear with another Tesla alert in the Battery Management System (BMS) system.
- The vehicle may limit charging, driving, comfort, or safety features depending on the active alerts.
- The alert may clear after sleep, but recurring alerts should be treated as service-relevant.
How to Diagnose and Resolve
- 1 Reboot the vehicle (hold both scroll wheels for 10 seconds)
- 2 Check the Tesla app for any pending software updates
- 3 Monitor the alert over 1–2 charge cycles; schedule service if it recurs
Severity Notes
BMS-A162 is an Alert in the Battery Management System system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.