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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Engine Control System - Diagnostic Codes (2 Of 6)) >> SFI System >> DTC P011B-62: Engine Coolant Temperature / Intake Air Temperature Signal Compare Failure [12/2023 - ] >> Procedure

DTC P011B-62: Engine Coolant Temperature / Intake Air Temperature Signal Compare Failure [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P011B-62) 
    1. Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      P011B-62 and other DTCs are output A
      P011B-62 is output B

      HINT: 

      If any DTCs other than P011B-62 are output, troubleshoot those DTCs first.

    Result: 

    GO TO DTC CHART. Refer To  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    See step  2

  2. READ VALUE USING GTS (INTAKE AIR TEMPERATURE) 

    Pre-procedure1

    • Leave the vehicle for 7 hours or more.

      HINT: 

      It is necessary to leave the vehicle for 7 hours or more to create conditions similar to the DTC detection conditions.

    • According to the display on the GTS, read the Data List.

      Powertrain > Engine > Data List 

      Tester Display
      Intake Air Temperature

      Standard

      Difference between the intake air temperature and the actual outside air temperature is 10°C (18°F) or less.

      HINT: 

      The temperature displayed on the outside temperature gauge of the vehicle (if equipped) is not suitable for comparing to the intake air temperature reading. The outside temperature gauge has a significant delay built into prevent swings in the temperature display. Use an accurate thermometer to determine the outside air temperature.

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None.

    Result: 

    NG 

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    OK 

    See step  3

  3. READ VALUE USING GTS (COOLANT TEMPERATURE) 
    1. According to the display on the GTS, read the Data List.

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temperature

      Standard

      The difference between the coolant temperature and the actual outside air temperature is 10°C (18°F) or less.

      HINT: 

      If the result is not as specified, check that there are no heat sources such as a block heater in the engine compartment.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [12/2023 - ]