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Home >> Toyota >> 2025 >> Prius LE >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Front Side Radar Sensor System - Diagnostic Codes >> Front Side Radar Sensor System >> DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message [12/2022 - 03/2023] >> Procedure
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DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message [12/2022 - 03/2023]: Procedure

  1. CHECK FOR DTCs 
    1. Check for DTCs.

      HINT: 

      If the detection conditions are not met, the system cannot detect the malfunction.

      Body Electrical > Front Side Radar "A" > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      U0129-87, U0131-87 or U0293-87 is output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2022 - ] 

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2022 - ]