DTC U0073: Control Module Communication Bus "A" Off; DTC U0126: Lost Communication With Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module [06/2018 - 09/2022]: Description

WARNING: This page is about a different car, the 2022 Lexus ES 300h, 2021 Lexus ES 300h, 2020 Lexus ES 300h, and 2019 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

These DTCs are stored when the clearance warning ECU assembly cannot receive and recognize several signals via the CAN communication line.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0073	Control Module Communication Bus "A" Off	Control module communication bus off	CAN communication system
U0126	Lost Communication With Steering Angle Sensor Module	Lost communication with steering sensor	CAN communication system
U0129	Lost Communication with Brake System Control Module	Lost communication with skid control ECU	CAN communication system
U0140	Lost Communication with Body Control Module	Lost communication with main body ECU (multiplex network body ECU)	CAN communication system
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	Lost communication with the combination meter assembly	CAN communication system

HINT:

When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harnesses of each ECU.