Tesla THC Alert Codes
THC reference page with 19 Tesla alert codes, 14 detailed descriptions, severity counts, and diagnostic context.
What the THC system covers
THC alerts belong to Tesla's proprietary diagnostic alert system and are grouped under the network category.
Alert type breakdown
Tesla THC code list
Rows with a linked code have a dedicated detail page.
| Code | Severity | Type | Description |
|---|---|---|---|
| THC_d0004 THC_d0004_pumpPT | Info | Diagnostic | THC_d0004 - pump PT Tesla diagnostic code in the THC (THC) module. The coolant pump DTC is set on the Thermal Controller (THC) if the following alerts occur repeatedly over a specific time frame. THC_w0039_pumpPTLimp is set for 300 seconds or 100 times with less than 30 minutes between each occurrence. THC_w0040_pumpPTStop is set for 120 seconds or 10 times with less than 30 minutes between each occurrence. THC_w0044_sanityPumpPT is set for 120 seconds or 100 times with less than 30 minutes between each occurrence. THC_w0045_pumpPTFaultMax is set for 300 seconds or 100 times with less than 30 minutes between each occurrence. Diagnose the pump condition by investigating the relevant pump alert article(s) under Possible Causes. |
| THC_d0005 THC_d0005_pumpBat1 | Info | Diagnostic | THC_d0005 - pump Bat1 Tesla diagnostic code in the THC (THC) module. The coolant pump DTC is set on the Thermal Controller (THC) if the following warnings occur repeatedly over a specific time frame. THC_w0039_pumpPTLimp is set for 300 seconds or 100 times with less than 30 minutes between each occurrence. THC_w0040_pumpPTStop is set for 120 seconds or 10 times with less than 30 minutes between each occurrence. THC_w0044_sanityPumpPT is set for 120 seconds or 100 times with less than 30 minutes between each occurrence. THC_w0045_pumpPTFaultMax is set for 300 seconds or 100 times with less than 30 minutes between each occurrence. Diagnose the pump condition by investigating the relevant pump alert article(s) under Possible Causes. |
| THC_d0006 THC_d0006_pumpBat2 | Info | Diagnostic | THC_d0006 - pump Bat2 Tesla diagnostic code in the THC (THC) module. The coolant pump DTC is set on the Thermal Controller (THC) if the following warnings occur repeatedly over a specific time frame. THC_w0039_pumpPTLimp is set for 300 seconds or 100 times with less than 30 minutes between each occurrence. THC_w0040_pumpPTStop is set for 120 seconds or 10 times with less than 30 minutes between each occurrence. THC_w0044_sanityPumpPT is set for 120 seconds or 100 times with less than 30 minutes between each occurrence. THC_w0045_pumpPTFaultMax is set for 300 seconds or 100 times with less than 30 minutes between each occurrence. Diagnose the pump condition by investigating the relevant pump alert article(s) under Possible Causes. |
| THC_d0018 THC_d0018_activeAero | Info | Diagnostic | THC_d0018 - active Aero Tesla diagnostic code in the THC (THC) module. User Description: Toolbox can be used to resync the aero shutters. |
| THC_u0002 THC_u0002_frontDefrostLimited | Info | Unknown | THC_u0002 - front Defrost Limited Tesla unknown code in the THC (THC) module. The front defrost is limited because of low battery power. |
| THC_u0003 THC_u0003_cabinHVACLimited_HV | Info | Unknown | THC_u0003 - cabin HVAC Limited HV Tesla unknown code in the THC (THC) module related to cabin hvac limited hv. |
| THC_u0005 THC_u0005_cabinHVACLimited_PT | Info | Unknown | THC_u0005 - cabin HVAC Limited PT Tesla unknown code in the THC (THC) module. The cabin HVAC cooling is limited due to other vehicle side demands, such as HV battery cooling during supercharging.? |
| THC_w0016 THC_w0016_compOverheatWarning | Warning | Warning | THC_w0016 - comp Overheat Warning Tesla warning code in the THC (THC) module. None |
| THC_w0026 THC_w0026_DASCanTmo | Warning | Warning | THC_w0026 - DAS CAN Tmo Tesla warning code in the THC (THC) module related to das can tmo. |
| THC_w0042 THC_w0042_tempAuxHvacEvapRange | Warning | Warning | THC_w0042 - temp Aux Hvac Evap Range Tesla warning code in the THC (THC) module. The THC_w0042_tempAuxHvacEvapRange alert shall be set if:The value of the auxiliary HVAC evaporator temperature sensor is <= 100�C OR >= -40�C,The Thermal Controller (THC) is initialized.The THC_w0042_tempAuxHvacEvapRange alert shall be cleared if:The value of the auxiliary HVAC evaporator temperature sensor is > 100�C AND < -40�C.The Thermal Controller (THC) is uninitialized. |
| THC_w0105 THC_w0105_coolantBottleLowLevel | Warning | Warning | THC_w0105 - coolant Bottle Low Level Tesla warning code in the THC (THC) module. The level sensor in the coolant bottle is reading that the coolant level is too low. This alert will disable battery coolant heater. |
| THC_w0148 THC_w0148_refrigerantLow | Warning | Warning | THC_w0148 - refrigerant Low Tesla warning code in the THC (THC) module. The THC_w0148_refrigerantLow? warning was first released in FW 2017.24+ The THC_w0148_refrigerantLow alert shall be set if the following conditions are met for 60 seconds: THC is initialized The ambient temperature sensor is not faultedThe ambient temperature > 0 deg C Refrigerant discharge temp > 0 deg CThere are no refrigerant discharge temperature alerts (THC_a0137_rfrgDisTemp or THC_a0138_rfrgDisTempRange) There are no refrigerant suction temperature alerts (THC_a0142_rfrgSuctPress) or THC_a0145_rfrgSuctPressRange) The refrigerant discharge pressure < 0.25 bar The THC_w0148_refrigerantLow alert shall be cleared if the following conditions are met for 30 seconds: THC is initialized The ambient temperature sensor is not faulted The ambient temperature > 0 deg C Refrigerant discharge temp > 0 deg C There are no refrigerant discharge temperature alerts (THC_a0137_rfrgDisTemp or THC_a0138_rfrgDisTempRange) There are no refrigerant suction temperature alerts (THC_a0142_rfrgSuctPress) or THC_a0145_rfrgSuctPressRange) The refrigerant discharge pressure > 1.5 bar? Note: This warning will be customer facing in 2017.50. |
| THC_w0160 THC_w0160_compOvervoltage | Warning | Warning | THC_w0160 - comp Overvoltage Tesla warning code in the THC (THC) module related to comp overvoltage. |
| THC_w0190 THC_w0190_compShortCircuit | Warning | Warning | THC_w0190 - comp Short Circuit Tesla warning code in the THC (THC) module related to comp short circuit. |
| THC_w0237 THC_w0237_PTC_LeftCoreTempSensor | Warning | Warning | THC_w0237 - PTC Left Core Temp Sensor Tesla warning code in the THC (THC) module. This alert indicates the high voltage cabin heater has an internal temperature sensor problem. |
| THC_w0238 THC_w0238_PTC_RtCoreTempSensor | Warning | Warning | THC_w0238 - PTC Rt Core Temp Sensor Tesla warning code in the THC (THC) module. This alert indicates the high voltage cabin heater has an internal temperature sensor problem. |
| THC_w0242 THC_w0242_exvSelfError | Warning | Warning | THC_w0242 - exv Self Error Tesla warning code in the THC (THC) module. The THC_w0242_exvSelfError alert is set if the following is true: The EXV_Diagnosis signal has separately indicated an error 5 times since the thermal controller (THC) has powered on. The EXV_Diagnosis signal continuously indicates an error for 30 seconds. |
| THC_w0243 THC_w0243_aqsLinTmo | Warning | Warning | THC_w0243 - aqs Lin Tmo Tesla warning code in the THC (THC) module. None |
| THC_w0254 THC_w0254_radFanProblem | Warning | Warning | THC_w0254 - rad Fan Problem Tesla warning code in the THC (THC) module related to rad fan problem. |