TESLA Battery

Tesla HVP Alert Codes

High Voltage Protection reference page with 52 Tesla alert codes, 19 detailed descriptions, severity counts, and diagnostic context.

3
Critical
48
Warning
1
Caution
0
Info

What the HVP system covers

High Voltage Protection alerts belong to Tesla's proprietary diagnostic alert system and are grouped under the battery category.

Read all active alerts together instead of diagnosing a single code in isolation.
Check recent service, firmware updates, and low-voltage battery condition.
Use Tesla Service or a qualified EV technician for safety-critical systems.

Alert type breakdown

Warning 48 Alert 4

Tesla HVP code list

Rows with a linked code have a dedicated detail page.

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Code Severity Type Description
HVP_a007
HVP_a007_OverCurrentFault
Caution Alert
HVP_a007 - Over Current Fault

Tesla alert code in the High Voltage Protection (HVP) module. The high voltage (HV) system has reported an over-current condition. When this condition is detected, the pyro disconnect is fired to protect the HV battery, the vehicle, and the vehicle?s immediate environment from potential damage.

HVP_w001
HVP_w001_WatchdogReset
Warning Warning
HVP_w001 - Watchdog Reset

Tesla warning code in the High Voltage Protection (HVP) module related to watchdog reset.

HVP_w002
HVP_w002_UnusedAlert2
Warning Warning
HVP_w002 - Unused Alert2

Tesla warning code in the High Voltage Protection (HVP) module related to unused alert2.

HVP_w003
HVP_w003_SwAssertion
Warning Warning
HVP_w003 - SW Assertion

Tesla warning code in the High Voltage Protection (HVP) module related to sw assertion.

HVP_w005
HVP_w005_OverDchgCurrentFault
Warning Warning
HVP_w005 - Over Dchg Current Fault

Tesla warning code in the High Voltage Protection (HVP) module related to over dchg current fault.

HVP_w006
HVP_w006_OverChargeCurrentFault
Warning Warning
HVP_w006 - Over Charge Current Fault

Tesla warning code in the High Voltage Protection (HVP) module. Warns if the pack charge current is above max charge current limit The pack charge current is above max charge current limit for X duration (in msec) The pack charge current is below max charge current limit The DC charging will end and contactors may open immdediately or pyro may disconnect Warns if the CP ECU has faulted These charging will not be allowed Sets if an HVIL fault is detected. Contactors cannot close (car will no longer drive) if the contactors are currently open. If no repairs were performed and the alert clears on its own, there is risk of reoccurrence. The HVIL is broken or HVIL nodes are lower than expected Contactors will not close, it may open if vehicle not in drive Warn if pack contactor enter to the BLOCKED state Warns if the Energy reserve voltage supply is below minimum voltage threshold The Energy reserve voltage supply is below minimum voltage threshold The Energy reserve voltage supply is above minimum voltage threshold The pyro diagnostics may fail, the contactors will not close warn if harware triggers to blow the pyro This is an indication that pyro was blown The HVP config block may be missing, incorrect, or unsupported The HVP is unable to initialize configuration parameters

HVP_w007
HVP_w007_OverCurrentFault
Warning Warning
HVP_w007 - Over Current Fault

Tesla warning code in the High Voltage Protection (HVP) module related to over current fault.

HVP_w008
HVP_w008_OverTemperatureFault
Warning Warning
HVP_w008 - Over Temperature Fault

Tesla warning code in the High Voltage Protection (HVP) module related to over temperature fault.

HVP_w009
HVP_w009_OverVoltageFault
Warning Warning
HVP_w009 - Over Voltage Fault

Tesla warning code in the High Voltage Protection (HVP) module related to over voltage fault.

HVP_w010
HVP_w010_UnderVoltageFault
Warning Warning
HVP_w010 - Under Voltage Fault

Tesla warning code in the High Voltage Protection (HVP) module related to under voltage fault.

HVP_w011
HVP_w011_PrimaryBmbMiaFault
Warning Warning
HVP_w011 - Primary Bmb Mia Fault

Tesla warning code in the High Voltage Protection (HVP) module related to primary bmb mia fault.

HVP_w014
HVP_w014_BmsMiaOnHviFault
Warning Warning
HVP_w014 - BMS Mia On Hvi Fault

Tesla warning code in the High Voltage Protection (HVP) module related to bms mia on hvi fault.

HVP_w015
HVP_w015_CpMiaFault
Warning Warning
HVP_w015 - Cp Mia Fault

Tesla warning code in the High Voltage Protection (HVP) module. The CP node is mia on HVS CAN The pyro fuse will blow

HVP_w016
HVP_w016_PcsMiaFault
Warning Warning
HVP_w016 - Pcs Mia Fault

Tesla warning code in the High Voltage Protection (HVP) module related to pcs mia fault.

HVP_w017
HVP_w017_GtwMiaFault
Warning Warning
HVP_w017 - Gtw Mia Fault

Tesla warning code in the High Voltage Protection (HVP) module related to gtw mia fault.

HVP_w019
HVP_w019_CpFault
Warning Warning
HVP_w019 - Cp Fault

Tesla warning code in the High Voltage Protection (HVP) module. The CP ECU has faulted The CP ECU is not faulted

HVP_w020
HVP_w020_ShuntHwMiaFault
Warning Warning
HVP_w020 - Shunt HW Mia Fault

Tesla warning code in the High Voltage Protection (HVP) module. Contactor state is open

HVP_w021
HVP_w021_PyroMiaFault
Warning Warning
HVP_w021 - Pyro Mia Fault

Tesla warning code in the High Voltage Protection (HVP) module related to pyro mia fault.

HVP_w022
HVP_w022_PyroMiaWarning
Warning Warning
HVP_w022 - Pyro Mia Warning

Tesla warning code in the High Voltage Protection (HVP) module related to pyro mia warning.

HVP_w024
HVP_w024_Supply12vFault
Warning Warning
HVP_w024 - Supply12v Fault

Tesla warning code in the High Voltage Protection (HVP) module related to supply12v fault.

HVP_w025
HVP_w025_VerSupplyFault
Warning Warning
HVP_w025 - Ver Supply Fault

Tesla warning code in the High Voltage Protection (HVP) module related to ver supply fault.

HVP_w026
HVP_w026_HvilFault
Warning Warning
HVP_w026 - Hvil Fault

Tesla warning code in the High Voltage Protection (HVP) module. The HVIL is intact

HVP_w027
HVP_w027_BmsMiaOnHvsFault
Warning Warning
HVP_w027 - BMS Mia On Hvs Fault

Tesla warning code in the High Voltage Protection (HVP) module related to bms mia on hvs fault.

HVP_w028
HVP_w028_PackVoltMismatchFault
Warning Warning
HVP_w028 - Pack Volt Mismatch Fault

Tesla warning code in the High Voltage Protection (HVP) module. Warns if the pack voltage doesn't match approximately with sum of brick voltages The pack voltage doesn't match approximately with sum of brick voltages The pack voltage match approximately with sum of brick voltages The contactors may not be allowed to close Alerts if PyroLeakTest pyro diagnostic has cross warning threshold PyroLeakTest sees an Aout outside of 15% tolerance when measuring leakage Customer Facing text to seek service immediately Warns if the BMS node is mia on HVS CAN The BMS node is mia on HVS CAN The BMS node is not mia on HVS CAN Warn if FC contactors are forced open

HVP_w029
HVP_w029_EnsMiaFault
Warning Warning
HVP_w029 - Ens Mia Fault

Tesla warning code in the High Voltage Protection (HVP) module. Pack contactor state is open

HVP_w030
HVP_w030_PackPosCtrArcFault
Warning Warning
HVP_w030 - Pack Pos Ctr Arc Fault

Tesla warning code in the High Voltage Protection (HVP) module related to pack pos ctr arc fault.

HVP_w031
HVP_w031_packNegCtrArcFault
Warning Warning
HVP_w031 - pack Neg Ctr Arc Fault

Tesla warning code in the High Voltage Protection (HVP) module related to pack neg ctr arc fault.

HVP_w032
HVP_w032_ShuntHwAndBmsMiaFault
Warning Warning
HVP_w032 - Shunt HW And BMS Mia Fault

Tesla warning code in the High Voltage Protection (HVP) module. Warns if the HVP detectes both BMS and Shunt MIA while pack contactors closed If the HVP detectes both BMS and Shunt MIA while pack contactors closed When either BMS or Shunt is not mia Alerts if the HV pyro fuse is blown One of many critical HVP or BMS alert, log data contains the reason Clears after a pyro loop is completed and meets expectation Warns if the shunt current reading is not avaialble The shunt current reading is not avaialble The shunt current reading is avaialble Current readings are not avaialble

HVP_w033
HVP_w033_fcContHwFault
Warning Warning
HVP_w033 - fc Cont HW Fault

Tesla warning code in the High Voltage Protection (HVP) module related to fc cont hw fault.

HVP_w034
HVP_w034_cpMismatchFault
Warning Warning
HVP_w034 - cp Mismatch Fault

Tesla warning code in the High Voltage Protection (HVP) module. The CP version mismatch The CP version match expected

HVP_w035
HVP_w035_packContHwFault
Warning Warning
HVP_w035 - pack Cont HW Fault

Tesla warning code in the High Voltage Protection (HVP) module related to pack cont hw fault.

HVP_w036
HVP_w036_pyroFuseBlown
Warning Warning
HVP_w036 - pyro Fuse Blown

Tesla warning code in the High Voltage Protection (HVP) module related to pyro fuse blown.

HVP_w037
HVP_w037_pyroFuseFailedToBlow
Warning Warning
HVP_w037 - pyro Fuse Failed To Blow

Tesla warning code in the High Voltage Protection (HVP) module. HV is disconnected

HVP_w038
HVP_w038_CpilFault
Warning Warning
HVP_w038 - Cpil Fault

Tesla warning code in the High Voltage Protection (HVP) module. The CPIL loop is complete

HVP_w039
HVP_w039_PackContactorFellOpen
Warning Warning
HVP_w039 - Pack Contactor Fell Open

Tesla warning code in the High Voltage Protection (HVP) module. Warn if a pack contactor falls open during closed state Warns if the ENS line is not connected to HVC The ENS line is not connected to HVC ENS idle signal is detected on ENS line The crash signal may not be detected by HVP

HVP_w040
HVP_w040_FcContactorFellOpen
Warning Warning
HVP_w040 - Fc Contactor Fell Open

Tesla warning code in the High Voltage Protection (HVP) module related to fc contactor fell open.

HVP_w041
HVP_w041_packCtrCloseBlocked
Warning Warning
HVP_w041 - pack Ctr Close Blocked

Tesla warning code in the High Voltage Protection (HVP) module related to pack ctr close blocked.

HVP_w042
HVP_w042_fcCtrCloseBlocked
Warning Warning
HVP_w042 - fc Ctr Close Blocked

Tesla warning code in the High Voltage Protection (HVP) module related to fc ctr close blocked.

HVP_w043
HVP_w043_packContactorForceOpen
Warning Warning
HVP_w043 - pack Contactor Force Open

Tesla warning code in the High Voltage Protection (HVP) module. Warn if pack contactors are forced open Warns if the BMS node is mia on HVI CAN The BMS node is mia on HVI CAN The BMS node is not mia on HVI CAN CAN messages are not received from BMS or other nodes on vehicle Warns if the HVP detects unintended loss of contactor control (V or I) The HVP detects loss of contactor power or coil current Contactor power or coil current is dropped below threshold The contactors opens unintentionally Warns if the voltage and temperature readings from primary BMB chain are mia The voltage and temperature readings from primary BMB chain are mia The voltage and temperature readings from primary BMB chain are not mia The secondary bmb chain is used exclusively for voltage and temperature protoection Alerts if any of the pyro diagnostic has failed or the pyro has blown One of many pyro diagnostic has failed including the pyro having blown Clears after all the diagnostic has passed Sorry, Contactors are not allowed to close. Warn if pack contactors are not allowed to close This meta alert will set if any of the reasons for preventing contactors to close (listed in this alert payload) are still present. This alert is always set with an accompanying alert that provides more specific information for the fault. Pack contactor blocking condition is cleared While this alert is set, HV contactors will not be able to close. This will prevent drive, charge and 12V support and eventually the 12V battery will be fully discharged and the vehicle will go offline. The PCS node is mia on HVS CAN The PCS node is not mia on HVS CAN CAN messages are not received from PCS node Warn if FC contactors are not allowed to close FC contactor blocking condition is cleared warn if shunt temerature exceeds high threshold value shunt temperature falls below low threshold value This is an indication that there could be a high impedance joint and prolonged time at this temp could affect the properties of the manganin Warn if the CPIL fault is detected Warns if the HVP detects series arc at FC contactor The HVP detects series arc at FC contactor The arc condition is not detected at FC contactor Warns if the CP version mismatch HVP cannot trust the CP indication, thus it is not safe to charge warn if if the thermistor sense line is not connected This is an indication that shunt thermistor is not in place/missing/bad Warns if the crash signal is detected by HVP The crash signal is detected by HVP The ENS idle siganl is detected on ENS line Warns if the low voltage battery is below minimum voltage threshold The low voltage battery is below minimum voltage threshold The low voltage battery is above minimum voltage threshold The contactors may not remain closed A brick voltage is below minimum voltage limit A brick voltage is below minimum voltage limit for X duration (in seconds) All brick voltages are above minimum voltage limit The conactors may open immdediately or pyro fuse may blow The Gateway node is mia on HVS CAN The Gateway node is not mia on HVS CAN CAN messages are not received from Gateway node Warns if the pack current (discharge or charge) is above max current limit. The pack current (discharge or charge) is above max current limit. The pack current (discharge or charge) is below max current limit. Warns if the pack discharge is above max discharge current limit The pack current is above max discharge current limit for X duration (in msec) The pack current is below max discharge current limit The contactors will open immdediately or pyro fuse may blow A pack module temperature is above maximum temperature limit A pack module temperature is above maximum temperature limit for X duration (in seconds) All pack module temperatures are below maximum temperature limit The HVP part number may be missing, incorrect, or unsupported The HVP is unable to initialize parameters related to PCBA configuration Warns if the HVP detects series arc at pack contactor The HVP detects series arc at pack contactor The arc condition is not detected at pack contactor A brick voltage is above maximum voltage limit All brick voltages are below maximum voltage limit

HVP_w044
HVP_w044_fcContactorForceOpen
Warning Warning
HVP_w044 - fc Contactor Force Open

Tesla warning code in the High Voltage Protection (HVP) module. FC contactor state is open

HVP_w045
HVP_w045_dcLinkOverVoltage
Warning Warning
HVP_w045 - dc Link Over Voltage

Tesla warning code in the High Voltage Protection (HVP) module related to dc link over voltage.

HVP_w046
HVP_w046_shuntOverTemperature
Warning Warning
HVP_w046 - shunt Over Temperature

Tesla warning code in the High Voltage Protection (HVP) module related to shunt over temperature.

HVP_w047
HVP_w047_passivePyroDeploy
Warning Warning
HVP_w047 - passive Pyro Deploy

Tesla warning code in the High Voltage Protection (HVP) module related to passive pyro deploy.

HVP_w049
HVP_w049_packCtrCloseFailed
Warning Warning
HVP_w049 - pack Ctr Close Failed

Tesla warning code in the High Voltage Protection (HVP) module related to pack ctr close failed.

HVP_w050
HVP_w050_fcCtrCloseFailed
Warning Warning
HVP_w050 - fc Ctr Close Failed

Tesla warning code in the High Voltage Protection (HVP) module related to fc ctr close failed.

HVP_w051
HVP_w051_shuntThermistorMia
Warning Warning
HVP_w051 - shunt Thermistor Mia

Tesla warning code in the High Voltage Protection (HVP) module related to shunt thermistor mia.

HVP_w053
HVP_w053_hvVoltageSensorRationality
Warning Warning
HVP_w053 - HV Voltage Sensor Rationality

Tesla warning code in the High Voltage Protection (HVP) module. Pack voltage differs from DC Link voltage too much with contactors closed Warn if DC-link voltage is above over voltage threshold while closing contactors Contactors closing will be aborted Warn if FC contactor enter to the BLOCKED state

HVP_w054
HVP_w054_swMissingConfigBlock
Warning Warning
HVP_w054 - SW Missing Config Block

Tesla warning code in the High Voltage Protection (HVP) module related to sw missing config block.

HVP_w055
HVP_w055_swMissingPartNumber
Warning Warning
HVP_w055 - SW Missing Part Number

Tesla warning code in the High Voltage Protection (HVP) module related to sw missing part number.

HVP_a003
HVP_a003_High_Voltage_Power_System_Faul
Critical Alert
HVP_a003 - High Voltage Power System Fault

Tesla alert code in the High Voltage Platform module. High Voltage Power System Fault

HVP_a009
HVP_a009_High_Voltage_Isolation_Fault_D
Critical Alert
HVP_a009 - High Voltage Isolation Fault Detected

Tesla alert code in the High Voltage Platform module. High Voltage Isolation Fault Detected

HVP_a010
HVP_a010_High_Voltage_System_Shutdown_I
Critical Alert
HVP_a010 - High Voltage System Shutdown Initiated

Tesla alert code in the High Voltage Platform module. High Voltage System Shutdown Initiated