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Home >> Lexus >> 2011 >> IS F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0010-P014F) >> SFI System >> DTC P0116: Engine Coolant Temperature Circuit Range / Performance Problem >> Procedure
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DTC P0116: Engine Coolant Temperature Circuit Range / Performance Problem: 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 / Trouble Codes.
    5. Read the DTC.

      Result

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

      HINT: 

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

    B → See step   4 

    A: Go to next step 

  2. INSPECT WATER INLET WITH THERMOSTAT 
    1. Remove the water inlet with thermostat. Refer to REMOVAL .
    2. Check the valve opening temperature of the thermostat.

      Standard

      80°C to 84°C (176°F to 183°F)

      HINT: 

      In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.

    3. Reinstall the water inlet with thermostat. Refer to INSTALLATION .

    NG → See step   5 

    OK → See step   3 

  3. REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL 
  4. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  5. REPLACE WATER INLET WITH THERMOSTAT. Refer to  REMOVAL