VCFRONT_a478_LVBMS_MOSFET_Open

The low voltage battery management system (LVBMS) has opened the low voltage (LV) battery's internal protection transistor (MOSFET), disconnecting the LV battery from the rest of the vehicle electrical systems.

Live incidence rate

<0.01% (Extremely rare)

Vehicle messages

Low voltage battery service is required
Schedule service - Vehicle may not restart

Impact

The LV battery is unable to support vehicle electrical systems or to recharge via the power conversion system (PCS). The high voltage (HV) system will remain energized to continue supplying electrical power to the vehicle while the LV battery is unavailable. This may result in greater range loss than expected, increased HV system energy consumption when the vehicle is idle, and prevent the vehicle from sleeping.

Description

The low voltage battery management system (LVBMS) has opened the low voltage (LV) battery's internal protection transistor (MOSFET), disconnecting the LV battery from the rest of the vehicle electrical systems.

Cause

The LVBMS reports the LV battery's internal protection transistor (MOSFET) is open.

Clear condition

The LVBMS reports the LV battery's internal protection transistor (MOSFET) is closed again.

Models

Model 3 2017-2023, Model 3 2024+, Model Y, Model Y 2025+

Visibility

service-fix

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