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Home >> Lexus >> 2020 >> LS 500 Base, AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/ Vacuum Brake Booster) - Diagnostic Codes (1 Of 4) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster) >> DTC C1201: Engine Control System Malfunction [12/2017 - 09/2018] >> Procedure

DTC C1201: Engine Control System Malfunction [12/2017 - 09/2018]: Procedure

  1. CHECK SFI SYSTEM 
    1. Check if a SFI system DTC is output.

      Refer to DTC CHECK / CLEAR [12/2017 - 10/2020]

      Powertrain > Engine > Trouble Codes 

      Result

      Proceed to
      NEXT

    Result: 

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    INSPECT SFI SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2019]