Diagnostic Trouble Code Chart [01/2023 - ]

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

FRONT RADAR SENSOR SYSTEM

DTC No.	Detection Item	Link
C1A11-00	Front Radar Sensor Optical Axis Misalignment Malfunction	Refer to DTC C1A11-00: Front Radar Sensor Optical Axis Misalignment Malfunction [01/2023 - ]
C1A8C-46	Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure	Refer to DTC C1A8C-46: Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure; DTC C1A8D-1C: Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range; DTC C1A90-00: Malfunction of Millimeter-wave Circuit in Front Radar Sensor; DTC C1A91-00: Malfunction of Acceleration Sensor in Front Radar Sensor [01/2023 - ]
C1A8D-1C	Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range	Refer to DTC C1A8C-46: Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure; DTC C1A8D-1C: Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range; DTC C1A90-00: Malfunction of Millimeter-wave Circuit in Front Radar Sensor; DTC C1A91-00: Malfunction of Acceleration Sensor in Front Radar Sensor [01/2023 - ]
C1A90-00	Malfunction of Millimeter-wave Circuit in Front Radar Sensor	Refer to DTC C1A8C-46: Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure; DTC C1A8D-1C: Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range; DTC C1A90-00: Malfunction of Millimeter-wave Circuit in Front Radar Sensor; DTC C1A91-00: Malfunction of Acceleration Sensor in Front Radar Sensor [01/2023 - ]
C1A91-00	Malfunction of Acceleration Sensor in Front Radar Sensor	Refer to DTC C1A8C-46: Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure; DTC C1A8D-1C: Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range; DTC C1A90-00: Malfunction of Millimeter-wave Circuit in Front Radar Sensor; DTC C1A91-00: Malfunction of Acceleration Sensor in Front Radar Sensor [01/2023 - ]
U0104-87	Lost Communication with Cruise Control Module Missing Message	Refer to DTC U0104-87: Lost Communication with Cruise Control Module Missing Message [01/2023 - ]
U0305-57	Software Incompatibility with Cruise Control Module Invalid/Incompatible Software Component	Refer to DTC U0305-57: Software Incompatibility with Cruise Control Module Invalid/Incompatible Software Component [01/2023 - ]