Diagnostic Trouble Code Chart [10/2023 - ]

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

FRONT SIDE RADAR SENSOR SYSTEM

DTC No.	Detection Item	DTC Output from	Priority	Link
C1A16-04	Front Side Radar Sensor (Module "A") System Internal Failure	Front Side Radar "A"	A	Refer to DTC C1A16-04: Front Side Radar Sensor (Module "A") System Internal Failure [10/2023 - ]
C1A17-00	Front Side Radar Sensor (Module "A") Beam Axis Misalignment (Horizontal)	Front Side Radar "A"	A	Refer to DTC C1A17-00: Front Side Radar Sensor (Module "A") Beam Axis Misalignment (Horizontal) [10/2023 - ]
C1A18-04	Front Side Radar Sensor (Module "B") System Internal Failure	Front Side Radar "B"	A	Refer to DTC C1A18-04: Front Side Radar Sensor (Module "B") System Internal Failure [10/2023 - ]
C1A19-00	Front Side Radar Sensor (Module "B") Beam Axis Misalignment (Horizontal)	Front Side Radar "B"	A	Refer to DTC C1A19-00: Front Side Radar Sensor (Module "B") Beam Axis Misalignment (Horizontal) [10/2023 - ]
U0100-87	Lost Communication with ECM/PCM "A" Missing Message	Front Side Radar "A"	B	Refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module "A" Missing Message [10/2023 - ]
U0129-87	Lost Communication with Brake System Control Module "A" Missing Message	Front Side Radar "A"	B	Refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module "A" Missing Message [10/2023 - ]
U0131-87	Lost Communication with Power Steering Control Module "A" Missing Message	Front Side Radar "A"	B	Refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module "A" Missing Message [10/2023 - ]
U1235-87	Lost Communication with Cruise Control Front Distance Range Sensor Front Side "A" Missing Message	Front Side Radar "B"	A	Refer to DTC U1235-87: Lost Communication with Cruise Control Front Distance Range Sensor Front Side "A" Missing Message [10/2023 - ]
U1236-87	Lost Communication with Cruise Control Front Distance Range Sensor Front Side "B" Missing Message	Front Side Radar "A"	A	Refer to DTC U1236-87: Lost Communication with Cruise Control Front Distance Range Sensor Front Side "B" Missing Message [10/2023 - ]