MyTeslaMate App

Signal Name	Description	Condition	Impact	Important
VCREAR_a129_epbActiveDecelRequested	EPB is commanding the brakes to bring the vehicle to a stop	A critical ECU commands actice decel or vehicle is limp for 5 mins	Vehicle will decelerate	No
VCREAR_a130_epbLimpActivated	Limp mode activated	Any critical ECU requests limp	Vehicle will eventually apply brakes to bring vehicle to stop	No
VCREAR_a132_EGGRIGHT3_MIA	One or more of the expected CAN messages from the Etherloop Generalized Gateway Right (Core 3) were not received, indicating the EGGRIGHT3 ECU may be unavailable (MIA).	The local ECU does not receive one or more of the expected messages from the EGGRIGHT3 within the expected time frame.	Vehicle functions that depend on the EGGRIGHT3 may be unavailable or may not function as expected.	No
VCREAR_a142_EGGREAR1_MIA	One or more of the expected CAN messages from the Etherloop Generalized Gateway Rear (Core 1) were not received, indicating the EGGREAR1 ECU may be unavailable (MIA).	The local ECU does not receive one or more of the expected messages from the EGGREAR1 within the expected time frame.	Vehicle functions that depend on the EGGREAR1 may be unavailable or may not function as expected.	No
VCLEFT_a585_lvBatteryHealthTestRequired	The Low Voltage (LV) battery state of health is unknown. A health test is required to determine state of health.	The LV battery health test has not run within the last 12 weeks. This can also set after a left controller or LV battery replacement.	LV battery state of charge estimates can be inaccurate.	No
VCLEFT_a586_bothHeadlampsInternalError	Left and right headlamps report simultaneous matrix manager, LED, High Side Driver (HSD), or Boolean status errors indicating a condition affecting functionality of both headlamps.	For both headlamps, the SSL100 pixel matrix detects non-functional pixels or has communication issues, or the voltage measured across the Lowbeam Prefield, DRL segments, or Turn LEDs (Model S only) is out of range, or the LED drivers in the ECU have reported status flags, or certain values programmed in the SSL100 EEPROM are out of range, or the fan current is out of range.	Certain light functions or the headlamp fan may be degraded or disabled for both headlamps.	No
VCREAR_a128_MotorPVoltHigh	Motor positive lead voltage is greater than 6.0 volts while inactive	The Electronic Parking Brake motor is idle, and the positive lead voltage measurement is higher than 6.0 volts.	Caliper motor or harness may be damaged	No
VCREAR_a126_MotorNVoltLow	Motor negative lead voltage measurement is less than 0.5 volts while inactive	The Electronic Parking Brake motor is idle, and the negative lead voltage measurement is lower than 0.5 volts.	Caliper motor or harness may be damaged	No
VCREAR_a125_IdleVMismatch	The caliper may be disconnected.	The Electronic Parking Brake motor is idle, and the positive and negative lead's voltage measurement are more than 0.25V different	Electronic Parking Brake may not be able to apply or release	No
VCREAR_a127_MotorNVoltHigh	Motor negative lead voltage is greater than 6.0 volts while inactive	The Electronic Parking Brake motor is idle, and the negative lead voltage measurement is higher than 6.0 volts.	Caliper motor or harness may be damaged	No
VCREAR_a204_undervoltageLoadshedTriggered	Undervoltage loadshed protection has tripped on the Rear Vehicle Controller (VCREAR). Low Voltage (LV) bridge is expected to be open until the protection is cleared.	48V bus is reported undervoltage on VCREAR while the vehicle is in Drive.	LV bridge is open. Impacted load(s) unavailable in Drive.	No
VCREAR_a144_EGGLEFTVC_MIA	One or more of the expected CAN messages from the Etherloop Generalized Gateway Left (Core 1) were not received, indicating the EGGLEFTVC ECU may be unavailable (MIA).	The local ECU does not receive one or more of the expected messages from the EGGLEFTVC within the expected time frame.	Vehicle functions that depend on the EGGLEFTVC may be unavailable or may not function as expected.	No
VCLEFT_a590_seatEncStallThighSupport	The Thigh Support Motor is not providing encoder feedback.	The current draw is not zero and the motor is not stalling, but the encoder values do not increase.	Seat memory recall may be unavailable.	No
VCLEFT_a591_seatCurrUnderThighSupport	The Thigh Support Motor current is below the expected threshold, causing the motor to be unresponsive.	The motor current is below the expected threshold	Seat may be unable to move.	No
VCREAR_a116_VCLEFT_MIA	One or more of the messages the vehicle controller receives periodically from the left vehicle controller (VCLEFT) is not received, indicating the VCLEFT may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCLEFT within the expected time frame.	Vehicle functions that depend on the VCLEFT may be unavailable or may not function as expected.	No
VCREAR_a117_VCRIGHT_MIA	One or more of the messages the vehicle controller receives periodically from the right vehicle controller (VCRIGHT) is not received, indicating the VCRIGHT may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCRIGHT within the expected time frame.	Vehicle functions that depend on the VCRIGHT may be unavailable or may not function as expected.	No
VCREAR_a118_VCTRAILER_MIA	One or more of the messages the vehicle controller receives periodically from the trailer vehicle controller (VCTRAILER) is not received, indicating the VCTRAILER may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCTRAILER within the expected time frame.	Vehicle functions that depend on the VCTRAILER may be unavailable or may not function as expected.	No
VCLEFT_a595_seatThighSupportHCEncStlDbg	The Thigh Support Motor encoder unexpectedly stalls	Current draw exceeds 70% of the stall limit, and the encoder does not move for 100ms.	The seat motor encoder may increment incorrectly if an obstruction is encountered	No
VCREAR_a119_SCCM_MIA	One or more of the messages the vehicle controller receives periodically from the Steering Column Control Module (SCCM) is not received, indicating the SCCM may be unavailable (MIA).	One or more of the expected messages from the SCCM is not received.	Vehicle may be unable to shift between drive modes.	No
VCREAR_a114_ESP_MIA	One or more expected Controller Area Network (CAN) messages from the Electronic Stability Program (ESP) electronic control unit (ECU) was not received. Stability and traction control functions may be unavailable, or their performance may be affected.	An expected CAN message from the Electronic Stability Program (ESP) electronic control unit (ECU) has not been received within the expected timeout, or the message drop rate is too high while the ESP is CAN active.	Stability and traction control functions may be unavailable, or their performance may be affected.	No

VCREAR_a129_epbActiveDecelRequested

EPB is commanding the brakes to bring the vehicle to a stop

A critical ECU commands actice decel or vehicle is limp for 5 mins

Vehicle will decelerate

No

VCREAR_a130_epbLimpActivated

Limp mode activated

Any critical ECU requests limp

Vehicle will eventually apply brakes to bring vehicle to stop

No

VCREAR_a132_EGGRIGHT3_MIA

One or more of the expected CAN messages from the Etherloop Generalized Gateway Right (Core 3) were not received, indicating the EGGRIGHT3 ECU may be unavailable (MIA).

The local ECU does not receive one or more of the expected messages from the EGGRIGHT3 within the expected time frame.

Vehicle functions that depend on the EGGRIGHT3 may be unavailable or may not function as expected.

No

VCREAR_a142_EGGREAR1_MIA

One or more of the expected CAN messages from the Etherloop Generalized Gateway Rear (Core 1) were not received, indicating the EGGREAR1 ECU may be unavailable (MIA).

The local ECU does not receive one or more of the expected messages from the EGGREAR1 within the expected time frame.

Vehicle functions that depend on the EGGREAR1 may be unavailable or may not function as expected.

No

VCLEFT_a585_lvBatteryHealthTestRequired

The Low Voltage (LV) battery state of health is unknown. A health test is required to determine state of health.

The LV battery health test has not run within the last 12 weeks. This can also set after a left controller or LV battery replacement.

LV battery state of charge estimates can be inaccurate.

No

VCLEFT_a586_bothHeadlampsInternalError

Left and right headlamps report simultaneous matrix manager, LED, High Side Driver (HSD), or Boolean status errors indicating a condition affecting functionality of both headlamps.

For both headlamps, the SSL100 pixel matrix detects non-functional pixels or has communication issues, or the voltage measured across the Lowbeam Prefield, DRL segments, or Turn LEDs (Model S only) is out of range, or the LED drivers in the ECU have reported status flags, or certain values programmed in the SSL100 EEPROM are out of range, or the fan current is out of range.

Certain light functions or the headlamp fan may be degraded or disabled for both headlamps.

No

VCREAR_a128_MotorPVoltHigh

Motor positive lead voltage is greater than 6.0 volts while inactive

The Electronic Parking Brake motor is idle, and the positive lead voltage measurement is higher than 6.0 volts.

Caliper motor or harness may be damaged

No

VCREAR_a126_MotorNVoltLow

Motor negative lead voltage measurement is less than 0.5 volts while inactive

The Electronic Parking Brake motor is idle, and the negative lead voltage measurement is lower than 0.5 volts.

Caliper motor or harness may be damaged

No

VCREAR_a125_IdleVMismatch

The caliper may be disconnected.

The Electronic Parking Brake motor is idle, and the positive and negative lead's voltage measurement are more than 0.25V different

Electronic Parking Brake may not be able to apply or release

No

VCREAR_a127_MotorNVoltHigh

Motor negative lead voltage is greater than 6.0 volts while inactive

The Electronic Parking Brake motor is idle, and the negative lead voltage measurement is higher than 6.0 volts.

Caliper motor or harness may be damaged

No

VCREAR_a204_undervoltageLoadshedTriggered

Undervoltage loadshed protection has tripped on the Rear Vehicle Controller (VCREAR). Low Voltage (LV) bridge is expected to be open until the protection is cleared.

48V bus is reported undervoltage on VCREAR while the vehicle is in Drive.

LV bridge is open. Impacted load(s) unavailable in Drive.

No

VCREAR_a144_EGGLEFTVC_MIA

One or more of the expected CAN messages from the Etherloop Generalized Gateway Left (Core 1) were not received, indicating the EGGLEFTVC ECU may be unavailable (MIA).

The local ECU does not receive one or more of the expected messages from the EGGLEFTVC within the expected time frame.

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

No

VCLEFT_a590_seatEncStallThighSupport

The Thigh Support Motor is not providing encoder feedback.

The current draw is not zero and the motor is not stalling, but the encoder values do not increase.

Seat memory recall may be unavailable.

No

VCLEFT_a591_seatCurrUnderThighSupport

The Thigh Support Motor current is below the expected threshold, causing the motor to be unresponsive.

The motor current is below the expected threshold

Seat may be unable to move.

No

VCREAR_a116_VCLEFT_MIA

One or more of the messages the vehicle controller receives periodically from the left vehicle controller (VCLEFT) is not received, indicating the VCLEFT may be unavailable (MIA).

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

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

No

VCREAR_a117_VCRIGHT_MIA

One or more of the messages the vehicle controller receives periodically from the right vehicle controller (VCRIGHT) is not received, indicating the VCRIGHT may be unavailable (MIA).

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

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

No

VCREAR_a118_VCTRAILER_MIA

One or more of the messages the vehicle controller receives periodically from the trailer vehicle controller (VCTRAILER) is not received, indicating the VCTRAILER may be unavailable (MIA).

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

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

No

VCLEFT_a595_seatThighSupportHCEncStlDbg

The Thigh Support Motor encoder unexpectedly stalls

Current draw exceeds 70% of the stall limit, and the encoder does not move for 100ms.

The seat motor encoder may increment incorrectly if an obstruction is encountered

No

VCREAR_a119_SCCM_MIA

One or more of the messages the vehicle controller receives periodically from the Steering Column Control Module (SCCM) is not received, indicating the SCCM may be unavailable (MIA).

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

Vehicle may be unable to shift between drive modes.

No

VCREAR_a114_ESP_MIA

One or more expected Controller Area Network (CAN) messages from the Electronic Stability Program (ESP) electronic control unit (ECU) was not received. Stability and traction control functions may be unavailable, or their performance may be affected.

An expected CAN message from the Electronic Stability Program (ESP) electronic control unit (ECU) has not been received within the expected timeout, or the message drop rate is too high while the ESP is CAN active.

Stability and traction control functions may be unavailable, or their performance may be affected.

No

Alerts

Alerts