Diagnostic Trouble Code Chart [08/2021 - ]

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 300h, 2024 Lexus ES 250, 2023 Lexus ES 350, and 2023 Lexus ES 300h. 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 [08/2021 - ]
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 [08/2021 - ]
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 [08/2021 - ]
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 [08/2021 - ]
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 [08/2021 - ]
U0104-87	Lost Communication with Cruise Control Module Missing Message	Refer to DTC U0104-87: Lost Communication with Cruise Control Module Missing Message [08/2021 - ]
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 [08/2021 - ]