Diagnostic Trouble Code Chart [05/2023 - ]

WARNING: This page is about a different car, the 2024 Lexus LC 500h. However, it is still accessible from the selected car via links, so may be relevant.

FRONT RADAR SENSOR SYSTEM

DTC No.	Detection Item	DTC Output from	Priority	Link
C1A11-00	Front Radar Sensor Optical Axis Misalignment Malfunction	Front Radar Sensor	A	Refer to DTC C1A11-00: Front Radar Sensor Optical Axis Misalignment Malfunction [05/2023 - ]
C1A8C-46	Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure	Front Radar Sensor	A	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 [05/2023 - ]
C1A8D-1C	Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range	Front Radar Sensor	A	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 [05/2023 - ]
C1A90-00	Malfunction of Millimeter-wave Circuit in Front Radar Sensor	Front Radar Sensor	A	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 [05/2023 - ]
C1A91-00	Malfunction of Acceleration Sensor in Front Radar Sensor	Front Radar Sensor	A	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 [05/2023 - ]
U0104-87	Lost Communication with Cruise Control Module Missing Message	Front Radar Sensor	A	Refer to DTC U0104-87: Lost Communication with Cruise Control Module Missing Message [05/2023 - ]
U0305-57	Software Incompatibility with Cruise Control Module Invalid/Incompatible Software Component	Front Radar Sensor	A	Refer to DTC U0305-57: Software Incompatibility with Cruise Control Module Invalid/Incompatible Software Component [05/2023 - ]