LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2021 >> RX 350 Base, FWD >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning System - Diagnostics - Introduction (2 Of 2) >> Air Conditioning System >> Diagnostic Trouble Code Chart [12/2017 - 08/2019] >> Diagnostic Trouble Code Chart [12/2017 - 08/2019]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Chart [12/2017 - 08/2019]

AIR CONDITIONING SYSTEM

DTC No. Detection Item DTC Detection Condition Link
B1411/11 Room Temperature Sensor Circuit Open or short in room temperature sensor circuit Refer to DTC B1411/11: Room Temperature Sensor Circuit [09/2015 - ]
B1412/12 Ambient Temperature Sensor Circuit Open or short in ambient temperature sensor circuit Refer to DTC B1412/12: Ambient Temperature Sensor Circuit [09/2015 - ]
B1413/13 Evaporator Temperature Sensor Circuit Open or short in evaporator temperature sensor circuit Refer to DTC B1413/13: Evaporator Temperature Sensor Circuit [09/2015 - ]
B1417/17 Evaporator Temperature Circuit Open or short in rear evaporator temperature sensor circuit Refer to DTC B1417/17: Evaporator Temperature Circuit [12/2017 - ]
B1418/18 Exhaust Gas Sensor Circuit Open or short in smog ventilation sensor circuit (HC, CO) (w/ Smog Ventilation Sensor) Refer to DTC B1418/18: Exhaust Gas Sensor Circuit [09/2015 - ]
B1419/19 Rear Room Temperature Sensor Circuit Open or short in rear room temperature sensor circuit Refer to DTC B1419/19: Rear Room Temperature Sensor Circuit [12/2017 - ]
B1422/22 Compressor Lock Sensor Circuit Open or short in A/C lock sensor circuit Refer to DTC B1422/22: Compressor Lock Sensor Circuit [09/2015 - ]
B1423/23 Pressure Sensor Circuit
  • Open or short in air conditioner pressure sensor circuit
  • Refrigerant pressure on high pressure side is extremely low (176 kPa (1.8 kgf/cm2 , 26 psi) or less) or extremely high (3025 kPa (30.8 kgf/cm2 , 439 psi) or more)
 Refer to DTC B1423/23: Pressure Sensor Circuit [09/2015 - 08/2019]
B1441/41 Air Mix Damper Control Servo Motor Circuit (Passenger Side) Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) Refer to DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side) [09/2015 - ]
B1442/42 Air Inlet Damper Control Servo Motor Circuit Air inlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 blower damper servo sub-assembly Refer to DTC B1442/42: Air Inlet Damper Control Servo Motor Circuit [09/2015 - ]
B1443/43 Air Outlet Damper Control Servo Motor Circuit Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 3 air conditioning radiator damper servo sub-assembly Refer to DTC B1443/43: Air Outlet Damper Control Servo Motor Circuit [09/2015 - ]
B1446/46 Air Mix Damper Control Servo Motor Circuit (Driver Side) Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) Refer to DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side) [09/2015 - ]
B1447/47 Air Mix Damper Control Servo Motor Circuit (Rear) Air outlet damper position does not change when the air conditioning amplifier assembly operates the Rear No. 2 cooling unit damper servo sub-assembly. Refer to DTC B1447/47: Air Mix Damper Control Servo Motor Circuit (Rear) [12/2017 - ]
B1448/48 Passenger Side FACE Servo Motor Circuit Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 air conditioning radiator damper servo sub-assembly (front passenger side mode) Refer to DTC B1448/48: Passenger Side FACE Servo Motor Circuit [09/2015 - ]
B1449/49 Rear Air Outlet Damper Control Servo Motor Circuit Air mix damper position sensor value does not change even if air conditioning amplifier assembly operates No. 2 air conditioning radiator damper servo sub-assembly Refer to DTC B1449/49: Rear Air Outlet Damper Control Servo Motor Circuit [09/2015 - ]
B1451/51 Compressor Solenoid Circuit Open or short in compressor solenoid circuit Refer to DTC B1451/51: Compressor Solenoid Circuit [09/2015 - ]
B1461/61 Emission Gas NOx Sensor Circuit Open or short in emission gas NOx sensor circuit (w/ Smog Ventilation Sensor) Refer to DTC B1461/61: Emission Gas NOx Sensor Circuit [09/2015 - ]
B1486/86 Air Outlet Damper Control Servo Motor Circuit (Driver Side Front A/C Rear Air Flow) Rear air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates Rear No. 1 cooling unit damper servo sub-assembly Refer to DTC B1486/86: Air Outlet Damper Control Servo Motor Circuit (Driver Side Front A/C Rear Air Flow) [12/2017 - 08/2019]
B1497/97 BUS IC Communication Malfunction Error or open in communication line Refer to DTC B1497/97: BUS IC Communication Malfunction [12/2017 - 08/2019]
B14B3 Lost Communication with Rear Panel LIN Lost communication with No. 2 air conditioning control assembly Refer to DTC B14B3: Lost Communication with Rear Panel LIN [12/2017 - ]
B14B8 Refrigerant Shortage When following condition is detected in refrigerant shortage check in normal operation:
Amount of refrigerant is insufficient		 Refer to DTC B14B8: Refrigerant Shortage [09/2015 - 08/2019]
U0100 Lost Communication with ECM No communication with ECM Refer to DTC U0100: Lost Communication with ECM; DTC U0131: Lost Communication with Electric Power Steering ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Combination Meter; DTC U0163: Lost Communication with Navigation Control Module [09/2015 - ]
U0131 Lost Communication with Electric Power Steering ECU No communication with power steering ECU assembly Refer to DTC U0100: Lost Communication with ECM; DTC U0131: Lost Communication with Electric Power Steering ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Combination Meter; DTC U0163: Lost Communication with Navigation Control Module [09/2015 - ]
U0142 Lost Communication with Main Body ECU No communication with main body ECU (multiplex network body ECU) Refer to DTC U0100: Lost Communication with ECM; DTC U0131: Lost Communication with Electric Power Steering ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Combination Meter; DTC U0163: Lost Communication with Navigation Control Module [09/2015 - ]
U0151 Lost Communication with Restraints Control Module No communication with airbag sensor assembly Refer to DTC U0100: Lost Communication with ECM; DTC U0131: Lost Communication with Electric Power Steering ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Combination Meter; DTC U0163: Lost Communication with Navigation Control Module [09/2015 - ]
U0155 Lost Communication with Combination Meter No communication with combination meter assembly Refer to DTC U0100: Lost Communication with ECM; DTC U0131: Lost Communication with Electric Power Steering ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Combination Meter; DTC U0163: Lost Communication with Navigation Control Module [09/2015 - ]
U0163 Lost Communication with Navigation Control Module No communication with radio receiver assembly (A/C control panel) Refer to DTC U0100: Lost Communication with ECM; DTC U0131: Lost Communication with Electric Power Steering ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0151: Lost Communication with Restraints Control Module; DTC U0155: Lost Communication with Combination Meter; DTC U0163: Lost Communication with Navigation Control Module [09/2015 - ]
scientia non olet · About LEMON Manuals