Fail-Safe Chart [10/2022 - 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.
- FAIL-SAFE CHART DYNAMIC TORQUE CONTROL AWD SYSTEM
DTC No. Rob Code Trouble Area AWD Warning Message Fail-safe Operation Memory Fail-safe Deactivation Condition Front/Rear Distribution C05F5-1C - 4WD/AWD Front/Rear Range Actuator Control Circuit Performance Circuit Voltage Out of Range Displayed Prohibited Yes System returned to normal C120C-1C - Linear Solenoid Power Supply System Circuit Voltage Out of Range Displayed Prohibited Yes Ignition switch off C123A-1C - Supply Voltage Circuit Voltage Out of Range Displayed Prohibited Yes Ignition switch off or voltage range normal U0100-87 - Lost Communication with ECM/PCM "A" Missing Message Displayed Partially Permitted Yes Communication returned to normal U0126-87 - Lost Communication with Steering Angle Sensor Module Missing Message Displayed Permitted Yes Communication returned to normal U0129-87 - Lost Communication with Brake System Control Module Missing Message Displayed Prohibited Yes Communication returned to normal - X2001 Steering Angle Sensor Malfunction Not displayed Permitted Yes Communication returned to normal - X2004 Speed Sensor Malfunction Not displayed Prohibited Yes Communication returned to normal - X204A Acceleration Sensor Malfunction Not displayed Permitted Yes Communication returned to normal - X2087 Engine Malfunction Not displayed Partially Permitted Yes Communication returned to normal - X2103 Four-Wheel Drive Control System Temperature High Displayed Prohibited Yes Ignition switch off - X2104 Different Diameter Tire Displayed Prohibited Yes Returned to normal - X263D 4WD/AWD Range Actuator Adjusted Value Not Written Not displayed Prohibited NO Restored by writing the correct value - XF021 Software Not Programmed Displayed Prohibited NO Restored by writing software