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Home >> Lexus >> 2025 >> RX 350h Premium >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Power Steering System - Diagnostic Codes & Circuit Tests >> Power Steering System >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0132-87: Lost Communication with Suspension Control Module "A" Missing Message; DTC U0134-87: Lost Communication with Power Steering Control Module Rear Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1110-87: Lost Communication with Clearance Sonar Module [10/2022 - ] >> Description
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DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0132-87: Lost Communication with Suspension Control Module "A" Missing Message; DTC U0134-87: Lost Communication with Power Steering Control Module Rear Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1110-87: Lost Communication with Clearance Sonar Module [10/2022 - ]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate DTC Output from Priority Note
U0100-87 Lost Communication with ECM/PCM "A" Missing Message Lost communication with ECM
  • ECM
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on EMPS B for Gasoline Model
U0129-87 Lost Communication with Brake System Control Module Missing Message Lost communication with No. 2 skid control ECU (brake actuator assembly)*1
Lost communication with skid control ECU (brake actuator assembly)*2
  • No. 2 skid control ECU (brake actuator assembly)*1
  • Skid control ECU (brake actuator assembly)*2
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Comes on EMPS B -
U0132-87 Lost Communication with Suspension Control Module "A" Missing Message Lost communication with AVS ECU (absorber control ECU)
  • AVS ECU (Absorber control ECU)
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on EMPS B w/ Adaptive Variable Suspension
U0134-87 Lost Communication with Power Steering Control Module Rear Missing Message Lost communication with DRS ECU (rear steering control ECU)
  • Rear steering link assembly (DRS ECU)
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on EMPS B w/ Dynamic Rear Steering System
U023A-87 Lost Communication with Image Processing Module "A" Missing Message Lost communication with forward recognition camera
  • Forward recognition camera
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on EMPS B -
U0293-87 Lost Communication with Hybrid/EV Powertrain Control Module Missing Message Lost communication with hybrid vehicle control ECU
  • Hybrid vehicle control ECU
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on EMPS B except Gasoline Model
U1110-87 Lost Communication with Clearance Sonar Module Lost communication with clearance warning ECU assembly
  • Clearance warning ECU assembly
  • CAN communication system
  • Rack and pinion power steering gear assembly
 EPS warning light: Does not come on EMPS B w/ Advanced Park
  1. *1: except Gasoline Model
  2. *2: for Gasoline Model
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