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Home >> Lexus >> 2019 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Dynamic Rear Steering System - Diagnostic Codes & Symptom Tests >> Dynamic Rear Steering System >> DTC U0420-81: Invalid Data Received from Power Steering Control Module "A" Invalid Serial Data Received [10/2023 - ] >> Description
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DTC U0420-81: Invalid Data Received from Power Steering Control Module "A" Invalid Serial Data Received [10/2023 - ]: Description

In order to prevent abnormal operation, the rear steering link assembly monitors CAN communication from the EPS ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate DTC Output from Priority
U0420-81 Invalid Data Received from Power Steering Control Module "A" Invalid Serial Data Received The steering angle information received from the EPS ECU do not match between the two buses
  • Power steering ECU (rack and pinion power steering gear assembly)
  • DRS ECU (rear steering link assembly)
Displayed on MID DRS B