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Home >> Lexus >> 2023 >> ES 300h Base >> Repair and Diagnosis (Single Page) >> Steering >> Power Steering >> Power Steering System (Hybrid) - Diagnostic Codes & Circuit Tests >> POWER STEERING SYSTEM (for HV Model) >> DTC U0126: Lost Communication With Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U023A: Lost Communication with Front Camera Module; DTC U0293: Lost Communication with Hybrid Control Module [06/2018 - ] >> Description
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DTC U0126: Lost Communication With Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U023A: Lost Communication with Front Camera Module; DTC U0293: Lost Communication with Hybrid Control Module [06/2018 - ]: Description

The power steering ECU (rack and pinion power steering gear assembly) receives signals from the hybrid vehicle control ECU, steering sensor, skid control ECU (brake booster with master cylinder assembly) and forward recognition camera via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
U0126 Lost Communication With Steering Angle Sensor Module Lost communication with steering angle sensor
  • CAN communication system
  • Steering angle sensor
  • Rack and pinion power steering gear assembly
EPS warning light: Comes on The ECU judges the system has returned to normal or the power switch is turned on (IG) again -
U0129 Lost Communication with Brake System Control Module Lost communication with skid control ECU (Brake booster with master cylinder assembly)
  • CAN communication system
  • Skid control ECU (Brake booster with master cylinder assembly)
  • Rack and pinion power steering gear assembly
EPS warning light: Comes on The ECU judges the system has returned to normal or the power switch is turned on (IG) again -
U023A Lost Communication with Front Camera Module Lost communication with forward recognition camera
  • CAN communication system
  • Forward recognition camera
  • Rack and pinion power steering gear assembly
EPS warning light: Does not come on The ECU judges the system has returned to normal or the power switch is turned on (IG) again -
U0293 Lost Communication with Hybrid Control Module Lost communication with hybrid vehicle control ECU
  • CAN communication system
  • Hybrid vehicle control ECU
  • Rack and pinion power steering gear assembly
EPS warning light: Does not come on The ECU judges the system has returned to normal or the power switch is turned on (IG) again -