Inspection Procedure

HINT:

• If any of DTCs P0115, P0117, P0118 or P0125 are set simultaneously with DTC P0116, the ECT sensor may have an open or a short circuit. Troubleshoot those DTCs first.
• Read freeze frame data using the Intelligent tester or Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116) 
   1. Connect the Intelligent tester or Techstream to the DLC3.
   2. Turn the engine switch on (IG).
   3. Turn the tester ON.
   4. Enter the following menus:
      1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
      2. Techstream - Select: Powertrain / Engine / Trouble Codes.
   5. Read the DTC.

      Result 

      ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)
      
      

      Display (DTC Output)	Proceed to
      P0116	A
      P0116 and other DTCs	B

   B: GO TO  DIAGNOSTIC TROUBLE CODE CHART 

   A: GO TO NEXT STEP 

2. INSPECT WATER INLET WITH THERMOSTAT 
   1. Remove the water inlet with thermostat (see 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 (see INSTALLATION ).

   NG: REPLACE WATER INLET WITH THERMOSTAT  (See REMOVAL )

   OK: REPLACE ENGINE COOLANT TEMPERATURE (See  REMOVAL  )