BMS-A146
BMS_a146_SW_Brick_Overdischarged
What does BMS-A146 mean?
Tesla alert code in the Battery Management System (BMS) module. One or more bricks in the HV battery are at too low of a voltage to permit charging BMS detected and recovered from bus off on VEH, HVS or HVI CAN bus The BMS uses this for generic assertions about unexpected conditions An Soc by Ah saturation of >3% occurred while SOC saturation was active All bricks have <1% SOC by Ah saturation BMS is likely overestimating SOC of some bricks due to incorrect CAC or Coulomb counting BMS has detected that one or more bricks' voltage is below the warning threshold
Original Description
One or more bricks in the HV battery are at too low of a voltage to permit charging BMS detected and recovered from bus off on VEH, HVS or HVI CAN bus The BMS uses this for generic assertions about unexpected conditions An Soc by Ah saturation of >3% occurred while SOC saturation was active All bricks have <1% SOC by Ah saturation BMS is likely overestimating SOC of some bricks due to incorrect CAC or Coulomb counting BMS has detected that one or more bricks' voltage is below the warning threshold
Severity Notes
BMS-A146 is an Alert in the Battery Management System system. It is generally safe to continue driving, but have it checked at your next scheduled service.