Diagnostic Trouble Code Chart [10/2024 - ]

WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

DYNAMIC TORQUE CONTROL AWD SYSTEM

DTC No.	Detection Item	Warning Indicate	Memory	DTC Output from	Priority	Link
C05F5-1C	4WD/AWD Front/Rear Range Actuator Control Circuit Performance Circuit Voltage Out of Range	Displayed	Yes	Four Wheel Drive	A	Refer to DTC C05F5-1C: 4WD/AWD Front/Rear Range Actuator Control Circuit Performance Circuit Voltage Out of Range [10/2022 - ]
C123A-1C	Supply Voltage Circuit Voltage Out of Range	Displayed	Yes	Four Wheel Drive	A	Refer to DTC C123A-1C: Supply Voltage Circuit Voltage Out of Range [10/2022 - ]
U0100-87	Lost Communication with ECM/PCM "A" Missing Message	Displayed	Yes	Four Wheel Drive	B	Refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message [10/2022 - ]
U0126-87	Lost Communication with Steering Angle Sensor Module Missing Message	Displayed	Yes	Four Wheel Drive	B	Refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message [10/2022 - ]
U0129-87	Lost Communication with Brake System Control Module Missing Message	Displayed	Yes	Four Wheel Drive	B	Refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message [10/2022 - ]