DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U1184-87: Lost Communication with Advanced Drive Control Module Missing Message [11/2021 - 10/2023]: Description

WARNING: This page is about a different car, the 2024 Lexus LS 500h, 2023 Lexus LS 500h, and 2022 Lexus LS 500h. However, it is still accessible from the selected car via links, so may be relevant.

These DTCs are output if a malfunction occurs in the CAN communication system connected to the driver monitor ECU assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
U0126-87	Lost Communication with Steering Angle Sensor Module Missing Message	Communication is lost between the driver monitor ECU assembly and the steering sensor for approximately 1 second or more	CAN communication system	Driver Monitor Camera Control
U0129-87	Lost Communication with Brake System Control Module "A" Missing Message	Communication is lost between the driver monitor ECU assembly and the skid control ECU assembly for approximately 1 second or more	CAN communication system	Driver Monitor Camera Control
U0155-87	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	Communication is lost between the driver monitor ECU assembly and the combination meter assembly for approximately 5 second or more	CAN communication system	Driver Monitor Camera Control
U1184-87	Lost Communication with Advanced Drive Control Module Missing Message	Communication is lost between the driver monitor ECU assembly and the advanced drive ECU assembly for approximately 2 seconds or more	CAN communication system	Driver Monitor Camera Control