BMS-A139
BMS_a139_SW_DC_Link_V_Irrational
Also written as BMS_A139 / BMS A139 / BMS_a139_SW_DC_Link_V_Irrational / bms_a139_sw_dc_link_v_irrational
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-A139 mean?
Tesla alert code in the Battery Management System (BMS) module. BMS has detected a mismatch between the pack voltage and DC Link voltage while contactors are closed BMS has detected that the HVP configuration doesn't match
Original Description
BMS has detected a mismatch between the pack voltage and DC Link voltage while contactors are closed BMS has detected that the HVP configuration doesn't match
Affected Tesla Models
What You May Notice
- BMS-A139 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-A139 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.