MyTeslaMate App

Signal Name	Description	Condition	Impact	Important
PCS_a094_pcsDcdcNeedService	Power conversion system DCDC malfunction detected, PCS service is required	When 5V logic power rail exceeds 5.8V continuously for more than 1 minute	Car unable to start or drive, LV battery and system cannot be supported, AC charging functionality may also be affected	No
PCS_a095_dcdcSensorlessModeActive	PCS enables the DCDC control to run under sensorless mode, possibly due to some malfunction hardware	When 5V logic power rail is irrational and DCDC experienced faults when using it is original control scheme	DCDC running under sensorless control mode and some DCDC hardware protection may be affected	No
PCS_a100_suspectedViperChipIssue	The Power Conversion System (PCS) electronic control unit (ECU) detects the viper chip is experiencing a condition affecting AC charging functionality.	The PCS ECU detects a viper chip condition preventing the charger phase from boosting the intermediate bus to the specified threshold.	No expected impact on vehicle functionality.	No
PCS_a102_resetWithDCDCCmdAsserted	The Power Conversion System (PCS) electronic control unit (ECU) unexpectedly experiences a reset or power cycle while performing DCDC operations.	During initialization, the PCS ECU detects the High Voltage Processor (HVP) is already sending a control request for low voltage (LV) support, indicating the PCS likely experienced a reset or power cycle unexpectedly while performing DCDC operations.	No expected impact on vehicle functionality.	No
PCS_a109_deltaChargingL2L3SwappedDetected	The onboard charger detects an abnormal wiring of phase L2 and L3 while charging on a three-phase delta grid.	In the three-phase delta grid, onboard charger's L3 conductor is energized while L2 is not energized.	Reduced AC charging rate.	No
PEPSM_a015_NVMMError	An issue is indicated from the non-volatile memory manager.	Non-volatile memory misconfiguration or underlying flash/filesystem error.	Non-volatile memory records may be incorrect or missing.	No
PEPSM_a054_APP_MIA	One or more of the expected controller area network (CAN) messages from the Autopilot Primary (APP) were not received.	A message the local ECU expects to receive from the APP ECU is not received within the expected timeout, or the drop rate is too high while the APP is CAN active.	Autopilot does not operate as expected.	No
PEPSM_a059_inputResistanceHigh	A large voltage drop is detected in the input power to the vehicle controller, indicating the resistance on the input power feed to the vehicle controller is higher than expected.	Estimated resistance on the input power feed to the vehicle controller is higher than expected.	The vehicle controller may be unavailable due to lack of adequate input power, limiting vehicle functionality or making the vehicle inoperable, with at least one other alert specific to that condition present.	No
PEPSM_a063_SwitchFault	A condition affecting switch functionality has been detected.	A condition is detected affecting switch functionality. Alert log signal data should provide more information on the switch affected and specific condition.	The switch may not function or may not function as expected.	No
PEPSM_a069_PSFA_MIA	One or more of the messages the vehicle controller receives periodically from the Primary Steering Feedback Actuator (PSFA) electronic control unit (ECU) is not received, indicating the PSFA ECU may be unavailable (MIA).	One or more of the expected messages from the PSFA ECU is not received.	Steering wheel feedback functionality may be limited or unavailable.	No
PEPSM_a070_SSFA_MIA	One or more of the messages the vehicle controller receives periodically from the Secondary Steering Feedback Actuator (SSFA) electronic control unit (ECU) is not received, indicating the SSFA ECU may be unavailable (MIA).	One or more of the expected messages from the SSFA ECU is not received.	Steering wheel feedback functionality may be limited or unavailable.	No
PEPSM_a154_rackPositionInputInvalid	One of the required inputs for solving steering rack position is missing or invalid.	Missing or invalid controller rack position or input angle.	Rack control may be degraded.	No
PCS_a104_ambientTempRationality	PCS ambient temperature sensor is reporting an irrational value	Ambient temperature is outside of expected range for more than 1s	DCDC insufficient cooling check will be disabled if the ambient temp sensor is irrational	No
PCS_a107_vcPcsDCDCInterfaceMia	PCS does not receive the PCS <-> VC DCDC interface CAN messages from	Charger does not receive all expected DCDC interface CAN messages from vehicle controller	DCDC converter does not regulate LV bus voltage to target, LV battery may not charge correctly	No
PCS_a108_misconfigurationDetected	PCS detects it is misconfigured, please refer to the alert toolbox article to decode the miss configuration condition and fix them accordingly	PCS detects there are misconfigurations.	DCDC and/or AC charging may not function properly	No
PEPSM_a071_SEPS_MIA	One or more of the messages the vehicle controller receives periodically from the Secondary Electric Power Steering (SEPS) electronic control unit (ECU) is not received, indicating the SEPS ECU may be unavailable (MIA).	One or more of the expected messages from the SEPS ECU is not received.	Power steering may be limited or unavailable.	No
PEPSM_a072_PEPS_MIA	One or more of the messages the vehicle controller receives periodically from the Primary Electric Power Steering (PEPS) electronic control unit (ECU) is not received, indicating the PEPS ECU may be unavailable (MIA).	One or more of the expected messages from the PEPS ECU is not received.	Power steering may be limited or unavailable.	No
PEPSM_a087_DIREL_MIA	One or more of the messages the vehicle controller receives periodically from the rear left drive inverter (DIREL) is not received, indicating the DIREL may be unavailable (MIA).	One or more of the expected messages from the DIREL is not received.	Vehicle speed and power may be limited.	No
PEPSM_a088_DIRER_MIA	One or more of the messages the vehicle controller receives periodically from the rear right drive inverter (DIRER) is not received, indicating the DIRER may be unavailable (MIA).	One or more of the expected messages from the DIRER is not received.	Vehicle speed and power may be limited.	No
PEPSM_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

PCS_a094_pcsDcdcNeedService

Power conversion system DCDC malfunction detected, PCS service is required

When 5V logic power rail exceeds 5.8V continuously for more than 1 minute

Car unable to start or drive, LV battery and system cannot be supported, AC charging functionality may also be affected

No

PCS_a095_dcdcSensorlessModeActive

PCS enables the DCDC control to run under sensorless mode, possibly due to some malfunction hardware

When 5V logic power rail is irrational and DCDC experienced faults when using it is original control scheme

DCDC running under sensorless control mode and some DCDC hardware protection may be affected

No

PCS_a100_suspectedViperChipIssue

The Power Conversion System (PCS) electronic control unit (ECU) detects the viper chip is experiencing a condition affecting AC charging functionality.

The PCS ECU detects a viper chip condition preventing the charger phase from boosting the intermediate bus to the specified threshold.

No expected impact on vehicle functionality.

No

PCS_a102_resetWithDCDCCmdAsserted

The Power Conversion System (PCS) electronic control unit (ECU) unexpectedly experiences a reset or power cycle while performing DCDC operations.

During initialization, the PCS ECU detects the High Voltage Processor (HVP) is already sending a control request for low voltage (LV) support, indicating the PCS likely experienced a reset or power cycle unexpectedly while performing DCDC operations.

No expected impact on vehicle functionality.

No

PCS_a109_deltaChargingL2L3SwappedDetected

The onboard charger detects an abnormal wiring of phase L2 and L3 while charging on a three-phase delta grid.

In the three-phase delta grid, onboard charger's L3 conductor is energized while L2 is not energized.

Reduced AC charging rate.

No

PEPSM_a015_NVMMError

An issue is indicated from the non-volatile memory manager.

Non-volatile memory misconfiguration or underlying flash/filesystem error.

Non-volatile memory records may be incorrect or missing.

No

PEPSM_a054_APP_MIA

One or more of the expected controller area network (CAN) messages from the Autopilot Primary (APP) were not received.

A message the local ECU expects to receive from the APP ECU is not received within the expected timeout, or the drop rate is too high while the APP is CAN active.

Autopilot does not operate as expected.

No

PEPSM_a059_inputResistanceHigh

A large voltage drop is detected in the input power to the vehicle controller, indicating the resistance on the input power feed to the vehicle controller is higher than expected.

Estimated resistance on the input power feed to the vehicle controller is higher than expected.

The vehicle controller may be unavailable due to lack of adequate input power, limiting vehicle functionality or making the vehicle inoperable, with at least one other alert specific to that condition present.

No

PEPSM_a063_SwitchFault

A condition affecting switch functionality has been detected.

A condition is detected affecting switch functionality. Alert log signal data should provide more information on the switch affected and specific condition.

The switch may not function or may not function as expected.

No

PEPSM_a069_PSFA_MIA

One or more of the messages the vehicle controller receives periodically from the Primary Steering Feedback Actuator (PSFA) electronic control unit (ECU) is not received, indicating the PSFA ECU may be unavailable (MIA).

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

Steering wheel feedback functionality may be limited or unavailable.

No

PEPSM_a070_SSFA_MIA

One or more of the messages the vehicle controller receives periodically from the Secondary Steering Feedback Actuator (SSFA) electronic control unit (ECU) is not received, indicating the SSFA ECU may be unavailable (MIA).

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

Steering wheel feedback functionality may be limited or unavailable.

No

PEPSM_a154_rackPositionInputInvalid

One of the required inputs for solving steering rack position is missing or invalid.

Missing or invalid controller rack position or input angle.

Rack control may be degraded.

No

PCS_a104_ambientTempRationality

PCS ambient temperature sensor is reporting an irrational value

Ambient temperature is outside of expected range for more than 1s

DCDC insufficient cooling check will be disabled if the ambient temp sensor is irrational

No

PCS_a107_vcPcsDCDCInterfaceMia

PCS does not receive the PCS <-> VC DCDC interface CAN messages from

Charger does not receive all expected DCDC interface CAN messages from vehicle controller

DCDC converter does not regulate LV bus voltage to target, LV battery may not charge correctly

No

PCS_a108_misconfigurationDetected

PCS detects it is misconfigured, please refer to the alert toolbox article to decode the miss configuration condition and fix them accordingly

PCS detects there are misconfigurations.

DCDC and/or AC charging may not function properly

No

PEPSM_a071_SEPS_MIA

One or more of the messages the vehicle controller receives periodically from the Secondary Electric Power Steering (SEPS) electronic control unit (ECU) is not received, indicating the SEPS ECU may be unavailable (MIA).

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

Power steering may be limited or unavailable.

No

PEPSM_a072_PEPS_MIA

One or more of the messages the vehicle controller receives periodically from the Primary Electric Power Steering (PEPS) electronic control unit (ECU) is not received, indicating the PEPS ECU may be unavailable (MIA).

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

Power steering may be limited or unavailable.

No

PEPSM_a087_DIREL_MIA

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

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

Vehicle speed and power may be limited.

No

PEPSM_a088_DIRER_MIA

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

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

Vehicle speed and power may be limited.

No

PEPSM_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

Alerts

Alerts