BMS-A098
BMS_a098_SW_BMB_Data_Integrity_Loss
Also written as BMS_A098 / BMS A098 / BMS_a098_SW_BMB_Data_Integrity_Loss / bms_a098_sw_bmb_data_integrity_loss
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-A098 mean?
Tesla alert code in the Battery Management System (BMS) module. BMS data integrity loss due to BMB chain double break A prolonged communication issue with the BMB daisy chain that is known to cause a loss of BMB sensor data is detected No BMB sensor data loss conditions are detected for a prolonged period of time The BMS is likely performing BMB sensor data substitution to replace data missing due to the communication issue BMS contactor closure is blocked by one or more alerts BMS has an error transmitting on VEH, HVS or HVI CAN bus
Original Description
BMS data integrity loss due to BMB chain double break A prolonged communication issue with the BMB daisy chain that is known to cause a loss of BMB sensor data is detected No BMB sensor data loss conditions are detected for a prolonged period of time The BMS is likely performing BMB sensor data substitution to replace data missing due to the communication issue BMS contactor closure is blocked by one or more alerts BMS has an error transmitting on VEH, HVS or HVI CAN bus
Affected Tesla Models
What You May Notice
- BMS-A098 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-A098 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.