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Home >> Lexus >> 2014 >> IS 350 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FSE) - Diagnostic Codes (2 Of 6) >> SFI System >> DTC P0116: Engine Coolant Temperature Circuit Range / Performance Problem [04/2013 - 06/2014] >> Procedure
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DTC P0116: Engine Coolant Temperature Circuit Range / Performance Problem [04/2013 - 06/2014]: Procedure

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    5. Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      DTC P0116 is output A
      DTC P0116 and other DTCs are output B

      HINT: 

      If any DTCs and other than P0116 are output, troubleshoot those DTCs first.

    Result: 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [04/2013 - 06/2014] 

    Result: 

    See step  2

  2. INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY 
    1. Inspect the water inlet with thermostat sub-assembly (thermostat opening temperature).

      Refer to INSPECTION [04/2013 - 10/2017]

      HINT: 

      Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

      Refer to INITIALIZATION [04/2013 - 10/2017]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [04/2013 - 10/2017] 

    Result: 

    NG 

    REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY. Refer to  REMOVAL [04/2013 - 10/2017]