SFI SYSTEM, Diagnostic DTC:P0116

DTC Code DTC Name
P0116 Engine Coolant Temperature Circuit Range / Performance Problem

DESCRIPTION

Refer to DTC P0115 Click here.

DTC No. DTC Detection Condition Trouble Area
P0116

When either of following conditions met (2 trip detection logic):


  • When cold engine started and engine warmed up, Engine Coolant Temperature (ECT) sensor value does not change.

  • After warmed up engine stopped and then next cold engine start performed, ECT sensor value does not change.

  • Water inlet sub-assembly with thermostat

  • ECT sensor

MONITOR DESCRIPTION

ECT sensor cold start monitor

When a cold engine start is performed and then the engine is warmed up, if the ECT sensor value does not change, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the MIL is illuminated and a DTC is set.

ECT sensor soak monitor

If the ECT sensor value does not change after the warmed up engine is stopped and then the next cold engine start is performed, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the MIL is illuminated and a DTC is set.

INSPECTION PROCEDURE

Tech Tips


  • If DTC P0115, P0117, P0118 or P0125 is 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. 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.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the tester ON.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC.

    5. Read the DTC.

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

    B

    GO TO DTC CHART Click here

    A

  2. INSPECT WATER INLET SUB-ASSEMBLY WITH THERMOSTAT


    1. Remove the water inlet sub-assembly with thermostat Click here.

    2. Check the valve opening temperature of the thermostat.

      Standard
      80 to 84°C (176 to 183°F)

      Tech Tips

      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 sub-assembly with thermostat Click here.


    NG

    REPLACE WATER INLET SUB-ASSEMBLY WITH THERMOSTAT Click here

    OK

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here