MyTeslaMate App

Signal Name	Description	Condition	Impact	Important
VCBATT_a555_LVBatteryCellRebalancing	The low voltage battery management system (LVBMS) reports it has detected a low voltage (LV) battery cell voltage imbalance and is attempting to rebalance the cell voltages. The vehicle will be kept awake to support the LV battery until the rebalancing attempt is complete.	The LVBMS detects that all LV battery cell voltages are not within 100mV of each other.	The LV battery may suddenly become unavailable and unable to support vehicle electrical systems. The LV battery may require replacement, and a separate alert should be present to indicate this condition if applicable.	No
VCBATT_a559_LVBatteryLowSOC	The low voltage battery management system (LVBMS) reports the low voltage (LV) battery has a reduced state of charge (SOC), which may lead to the LVBMS opening the LV battery internal protection transistor (MOSFET).	The LVBMS detects the LV battery SOC is below 15% for 5 seconds.	The LV battery may be unable to support vehicle electrical systems.	No
VCBATT_a562_LVBMSModuleOvertemperature	The Low Voltage Battery Management System (LVBMS) detects that the low voltage (LV) battery pack is experiencing high temperatures.	The LVBMS module temperature has reached 60 deg C for 1 second.	The low voltage (LV) battery may show degraded performance or become unavailable due to high temperatures.	No
VCDOORFL_a096_OCS1P_MIA	One or more of the messages the vehicle controller receives periodically from the 1st row passenger occupancy classification system (OCS1P) electronic control unit (ECU) is not received, indicating the OCS1P ECU may be unavailable (MIA).	One or more of the expected messages from the OCS1P ECU is not received.	Vehicle functions that depend on the OCS1P may be unavailable or may not function as expected.	No
VCBATT_a528_LVBatteryCommsDiscnctd	The low voltage (LV) battery is not communicating as expected, indicating a potential disconnection with the vehicle controller.	Electronic connector position assurance (ECPA) state is signal not available (SNA), or the intelligent battery sensor (IBS) is not functioning as expected and the low voltage battery management system (LVBMS) is not communicating (MIA).	Loss of low voltage (LV) battery communication with vehicle controller, so the vehicle electrical system may only be supported via the power conversion system (PCS).	No
VCDOORFL_a098_DIR_MIA	One or more of the messages the vehicle controller receives periodically from the rear drive inverter (DIR) electronic control unit (ECU) is not received, indicating the DIR ECU may be unavailable (MIA).	One or more of the expected messages from the DIR ECU is not received.	Vehicle speed and power may be limited.	No
VCBATT_a540_leftFogLightGuideLightFault	An electrical error has been detected with the left fog light guide (white light pipe in front fascia that turns on along with fog light).	The high side driver (HSD) for the left fog light guide reports that an undercurrent or short circuit condition is present.	The left fog light guide may not be working.	No
VCBATT_a544_LVBatteryCommsBusTurnedOff	The vehicle controller has disabled communications over the bus that connects to the low voltage (LV) battery after detecting a condition (or conditions) that may cause the LV battery to become overdischarged. To avoid overdischarge that could make the LV battery unrecoverable, do not restore communications until the LV system is fully supported by the Power Conversion System (PCS).	The vehicle controller detects the LV battery may become overdischarged unless it sleeps, and also determines vehicle conditions are OK to disable LV battery communications.	The vehicle controller will have less information about the LV battery until it is serviced. Headlamps and windshield wipers may be unavailable, or may not function as expected.	No
VCDOORFL_a099_PARK_MIA	One or more expected Controller Area Network (CAN) messages from the Park Assist (PARK) electronic control unit (ECU) was not received. Autopark and Summon functions may be unavailable, or their performance may be affected.	An expected CAN message from the Park Assist (PARK) electronic control unit (ECU) has not been received within the expected timeout, or the message drop rate is too high while the park assist ECU is CAN active. The PARK ECU is considered CAN active when VCFRONT_chGoToSleep is 0 AND VCFRONT_parkLVState is LV_ON.	Autopark and Summon functions may be unavailable, or their performance may be affected.	No
VCDOORFL_a095_CHG_MIA	One or more of the messages the vehicle controller receives periodically from the onboard charger (CHG) electronic control unit (ECU) is not received, indicating the CHG ECU may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the CHG ECU within the expected time frame.	Charging may not start or may be interrupted unexpectedly.	No
VCBATT_a541_LVBatteryChargeOCLevel1	The low voltage battery management system (LVBMS) reports it has detected the charge current is above the maximum limit for the low voltage (LV) battery cells in their present condition.	The LVBMS detects the charge current is above the maximum limit for the LV battery cells in their present condition for 1 second.	Exceeding charge current limits may shorten the life of LV battery cells, leading to accelerated degradation and replacement.	No
VCDOORFL_a002_PowerLossReset	Warns if the processor has experienced a reset due to power loss.	Sudden power loss.	Controller is MIA for some time.	No
VCBATT_a522_hibernationActiveLogCapture	Vehicle will enter deep sleep to conserve energy in 10 minutes. It is possible to wake the vehicle up within the next 10 minutes by pressing the trunk button or applying external voltage to the front trunk (frunk) access posts.	The vehicle is in Transport Mode and the high voltage (HV) battery state of charge (SOC) is low.	Vehicle will only wake from deep sleep via a trunk button press or when external voltage is applied to the frunk access posts.	No
VCBATT_a521_vcleftEFuseLoadShed	The electrical current flowing through the left vehicle controller (VCLEFT) eFuse is greater or equal to 100A. The VCLEFT eFuse circuit may open (trip) if the low voltage (LV) electrical system loads are not reduced. The vehicle controller requests the VCLEFT to shed vehicle electrical loads by cutting power to the less essential loads.	The VCLEFT eFuse current value equals or exceeds 100A for 100 milliseconds.	Some convenience features controlled by the VCLEFT will be unavailable as the vehicle controller limits the LV electrical system current draw by cutting power to some loads.	No
VCBATT_a523_eFuseThresholdsIncorrect	The eFuse application-specific integrated circuit (ASIC) on the vehicle controller has incorrect thresholds set.	The vehicle controller detects incorrect threshold values on its eFuse ASIC for 1 second.	The eFuse ASIC on the vehicle controller may not function as expected.	No
VCBATT_a517_hibernationRecovery	The vehicle is attempting to recover from a deep sleep. If the vehicle does not begin charging, the vehicle will reenter deep sleep after 10 minutes.	The vehicle is in Transport Mode, the high voltage (HV) battery state of charge (SOC) is low, and the user attempts to interact with the vehicle.	Vehicle requires charging before it can be recovered from deep sleep. Until adequately charged, the vehicle will only wake from deep sleep via a trunk button press or when external voltage is applied to the frunk access posts.	No
VCBATT_a525_LVBatterySWMisconfiguration	The low voltage (LV) battery type detected on startup does not match the LV battery type reported by the vehicle gateway (GTW) configuration.	The LV battery type detected on startup does not match the LV battery type reported by the GTW configuration.	LV battery performance may be limited. LV battery support for vehicle electrical systems may be limited or unavailable.	No
VCBATT_a518_LVBMSFault_MOS_Open_packOV	The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a pack overvoltage condition.	The LVBMS detects a pack overvoltage condition affecting the LV battery.	The LV battery may be damaged and may be unable to support vehicle electrical systems.	No
VCDOORFL_a093_VCSEATP_MIA	One or more of the messages the vehicle controller receives periodically from the front passenger seat controller (VCSEATP) is not received, indicating the VCSEATP may be unavailable (MIA).	One or more of the expected messages from the VCSEATP is not received.	Front passenger seat features depending on VCSEATP functionality, including seat buckle and heating pad, may be limited or unavailable.	No
VCBATT_a514_LVBMSFault_MOS_Open_cellUV	The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a cell undervoltage condition.	The LVBMS detects a cell undervoltage condition affecting the LV battery.	The LV battery may be damaged and may be unable to support vehicle electrical systems.	No

VCBATT_a555_LVBatteryCellRebalancing

The low voltage battery management system (LVBMS) reports it has detected a low voltage (LV) battery cell voltage imbalance and is attempting to rebalance the cell voltages. The vehicle will be kept awake to support the LV battery until the rebalancing attempt is complete.

The LVBMS detects that all LV battery cell voltages are not within 100mV of each other.

The LV battery may suddenly become unavailable and unable to support vehicle electrical systems. The LV battery may require replacement, and a separate alert should be present to indicate this condition if applicable.

No

VCBATT_a559_LVBatteryLowSOC

The low voltage battery management system (LVBMS) reports the low voltage (LV) battery has a reduced state of charge (SOC), which may lead to the LVBMS opening the LV battery internal protection transistor (MOSFET).

The LVBMS detects the LV battery SOC is below 15% for 5 seconds.

The LV battery may be unable to support vehicle electrical systems.

No

VCBATT_a562_LVBMSModuleOvertemperature

The Low Voltage Battery Management System (LVBMS) detects that the low voltage (LV) battery pack is experiencing high temperatures.

The LVBMS module temperature has reached 60 deg C for 1 second.

The low voltage (LV) battery may show degraded performance or become unavailable due to high temperatures.

No

VCDOORFL_a096_OCS1P_MIA

One or more of the messages the vehicle controller receives periodically from the 1st row passenger occupancy classification system (OCS1P) electronic control unit (ECU) is not received, indicating the OCS1P ECU may be unavailable (MIA).

One or more of the expected messages from the OCS1P ECU is not received.

Vehicle functions that depend on the OCS1P may be unavailable or may not function as expected.

No

VCBATT_a528_LVBatteryCommsDiscnctd

The low voltage (LV) battery is not communicating as expected, indicating a potential disconnection with the vehicle controller.

Electronic connector position assurance (ECPA) state is signal not available (SNA), or the intelligent battery sensor (IBS) is not functioning as expected and the low voltage battery management system (LVBMS) is not communicating (MIA).

Loss of low voltage (LV) battery communication with vehicle controller, so the vehicle electrical system may only be supported via the power conversion system (PCS).

No

VCDOORFL_a098_DIR_MIA

One or more of the messages the vehicle controller receives periodically from the rear drive inverter (DIR) electronic control unit (ECU) is not received, indicating the DIR ECU may be unavailable (MIA).

One or more of the expected messages from the DIR ECU is not received.

Vehicle speed and power may be limited.

No

VCBATT_a540_leftFogLightGuideLightFault

An electrical error has been detected with the left fog light guide (white light pipe in front fascia that turns on along with fog light).

The high side driver (HSD) for the left fog light guide reports that an undercurrent or short circuit condition is present.

The left fog light guide may not be working.

No

VCBATT_a544_LVBatteryCommsBusTurnedOff

The vehicle controller has disabled communications over the bus that connects to the low voltage (LV) battery after detecting a condition (or conditions) that may cause the LV battery to become overdischarged. To avoid overdischarge that could make the LV battery unrecoverable, do not restore communications until the LV system is fully supported by the Power Conversion System (PCS).

The vehicle controller detects the LV battery may become overdischarged unless it sleeps, and also determines vehicle conditions are OK to disable LV battery communications.

The vehicle controller will have less information about the LV battery until it is serviced. Headlamps and windshield wipers may be unavailable, or may not function as expected.

No

VCDOORFL_a099_PARK_MIA

One or more expected Controller Area Network (CAN) messages from the Park Assist (PARK) electronic control unit (ECU) was not received. Autopark and Summon functions may be unavailable, or their performance may be affected.

An expected CAN message from the Park Assist (PARK) electronic control unit (ECU) has not been received within the expected timeout, or the message drop rate is too high while the park assist ECU is CAN active. The PARK ECU is considered CAN active when VCFRONT_chGoToSleep is 0 AND VCFRONT_parkLVState is LV_ON.

Autopark and Summon functions may be unavailable, or their performance may be affected.

No

VCDOORFL_a095_CHG_MIA

One or more of the messages the vehicle controller receives periodically from the onboard charger (CHG) electronic control unit (ECU) is not received, indicating the CHG ECU may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the CHG ECU within the expected time frame.

Charging may not start or may be interrupted unexpectedly.

No

VCBATT_a541_LVBatteryChargeOCLevel1

The low voltage battery management system (LVBMS) reports it has detected the charge current is above the maximum limit for the low voltage (LV) battery cells in their present condition.

The LVBMS detects the charge current is above the maximum limit for the LV battery cells in their present condition for 1 second.

Exceeding charge current limits may shorten the life of LV battery cells, leading to accelerated degradation and replacement.

No

VCDOORFL_a002_PowerLossReset

Warns if the processor has experienced a reset due to power loss.

Sudden power loss.

Controller is MIA for some time.

No

VCBATT_a522_hibernationActiveLogCapture

Vehicle will enter deep sleep to conserve energy in 10 minutes. It is possible to wake the vehicle up within the next 10 minutes by pressing the trunk button or applying external voltage to the front trunk (frunk) access posts.

The vehicle is in Transport Mode and the high voltage (HV) battery state of charge (SOC) is low.

Vehicle will only wake from deep sleep via a trunk button press or when external voltage is applied to the frunk access posts.

No

VCBATT_a521_vcleftEFuseLoadShed

The electrical current flowing through the left vehicle controller (VCLEFT) eFuse is greater or equal to 100A. The VCLEFT eFuse circuit may open (trip) if the low voltage (LV) electrical system loads are not reduced. The vehicle controller requests the VCLEFT to shed vehicle electrical loads by cutting power to the less essential loads.

The VCLEFT eFuse current value equals or exceeds 100A for 100 milliseconds.

Some convenience features controlled by the VCLEFT will be unavailable as the vehicle controller limits the LV electrical system current draw by cutting power to some loads.

No

VCBATT_a523_eFuseThresholdsIncorrect

The eFuse application-specific integrated circuit (ASIC) on the vehicle controller has incorrect thresholds set.

The vehicle controller detects incorrect threshold values on its eFuse ASIC for 1 second.

The eFuse ASIC on the vehicle controller may not function as expected.

No

VCBATT_a517_hibernationRecovery

The vehicle is attempting to recover from a deep sleep. If the vehicle does not begin charging, the vehicle will reenter deep sleep after 10 minutes.

The vehicle is in Transport Mode, the high voltage (HV) battery state of charge (SOC) is low, and the user attempts to interact with the vehicle.

Vehicle requires charging before it can be recovered from deep sleep. Until adequately charged, the vehicle will only wake from deep sleep via a trunk button press or when external voltage is applied to the frunk access posts.

No

VCBATT_a525_LVBatterySWMisconfiguration

The low voltage (LV) battery type detected on startup does not match the LV battery type reported by the vehicle gateway (GTW) configuration.

The LV battery type detected on startup does not match the LV battery type reported by the GTW configuration.

LV battery performance may be limited. LV battery support for vehicle electrical systems may be limited or unavailable.

No

VCBATT_a518_LVBMSFault_MOS_Open_packOV

The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a pack overvoltage condition.

The LVBMS detects a pack overvoltage condition affecting the LV battery.

The LV battery may be damaged and may be unable to support vehicle electrical systems.

No

VCDOORFL_a093_VCSEATP_MIA

One or more of the messages the vehicle controller receives periodically from the front passenger seat controller (VCSEATP) is not received, indicating the VCSEATP may be unavailable (MIA).

One or more of the expected messages from the VCSEATP is not received.

Front passenger seat features depending on VCSEATP functionality, including seat buckle and heating pad, may be limited or unavailable.

No

VCBATT_a514_LVBMSFault_MOS_Open_cellUV

The low voltage battery management system (LVBMS) reports it has opened the low voltage (LV) battery internal protection transistor (MOSFET) after detecting a cell undervoltage condition.

The LVBMS detects a cell undervoltage condition affecting the LV battery.

The LV battery may be damaged and may be unable to support vehicle electrical systems.

No

Alerts

Alerts