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Home >> Lexus >> 2025 >> NX 250 FWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (4 Of 4) & Symptom Tests >> Airbag System >> DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message [11/2021 - ] >> Description

DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message [11/2021 - ]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate DTC Output from Priority Test Mode / Check Mode
U0129-87 Lost Communication with Brake System Control Module "A" Missing Message Communication stop occurs between the airbag sensor assembly and skid control ECU continuously for approximately 2 seconds or more.
  • CAN communication system
  • Airbag sensor assembly
  • No. 2 skid control ECU (brake actuator assembly)*1
  • Skid control ECU (brake actuator assembly)*2
 Comes on SRS Airbag B Does not apply to test/check mode
U023A-87 Lost Communication with Image Processing Module "A" Missing Message Communication stop occurs between the airbag sensor assembly and forward recognition camera continuously for approximately 10 seconds or more.
  • CAN communication system
  • Airbag sensor assembly
  • Forward recognition camera
 Comes on SRS Airbag B Does not apply to test/check mode
  1. *1: for HEV Model
  2. *2: for Gasoline Model
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