LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2024 >> NX 250 FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (P111C-P1364) >> SFI System >> DTC P111C-62: Control Module Internal Temperature Sensor/Intake Air Temperature Sensor Signal Compare Failure [03/2022 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P111C-62: Control Module Internal Temperature Sensor/Intake Air Temperature Sensor Signal Compare Failure [03/2022 - ]: Procedure

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P111C-62) 
    1. Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      DTC P111C-62 is output A
      DTC P111C-62 and other DTCs are output B

      HINT: 

      If any DTCs other than P111C-62 are output, troubleshoot those DTCs first.

    2. Record the freeze frame data.

    Result: 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2022 - 03/2023]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2023 - 03/2024]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2024 - ] 

    Result: 

    See step  2

  2. CHECK FREEZE FRAME DATA (COOLANT TEMPERATURE AND INTAKE AIR TEMPERATURE) 
    1. Using the GTS, read the values displayed in the freeze frame data recorded in step 1.

      Powertrain > Engine > DTC (P111C-62) > Freeze Frame Data 

      Tester Display
      Coolant Temperature
      Intake Air Temperature
    2. Read the value displayed on the GTS.

      Standard

      Difference between the Coolant Temperature and the Intake Air Temperature is within 15°C (27°F).

      HINT: 

      • When the engine is cold, the value of the coolant temperature, ECM internal temperature and Intake Air Temperature should be approximately the same.
      • Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

        Refer to INITIALIZATION [11/2021 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    NG 

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to  REMOVAL [11/2021 - ]