BMS-A117
BMS_a117_SW_Delta_SOC_Weak_Short
Also written as BMS_A117 / BMS A117 / BMS_a117_SW_Delta_SOC_Weak_Short / bms_a117_sw_delta_soc_weak_short
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-A117 mean?
Tesla alert code in the Battery Management System (BMS) module. A given brick has an alpha signal below the alert Alpha threshold. BMS has started a timer and will open contactors once it expires BMS received a request from the HVP to initiate a Graceful Power Off Set when brickV difference is greater than the brickV imbalance threshold Stack dump values from BMS corresponding to the watchdog event
Original Description
A given brick has an alpha signal below the alert Alpha threshold. BMS has started a timer and will open contactors once it expires BMS received a request from the HVP to initiate a Graceful Power Off Set when brickV difference is greater than the brickV imbalance threshold Stack dump values from BMS corresponding to the watchdog event
Affected Tesla Models
What You May Notice
- BMS-A117 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-A117 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.