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

Either condition is met (2 trip detection logic):


  • When engine is started cold and warmed up, the engine coolant temperature sensor value does not change.

  • After the warmed up engine is stopped and the next cold engine start is performed, the engine coolant temperature sensor value does not change.

  • Water inlet with thermostat

  • Engine coolant temperature sensor

MONITOR DESCRIPTION

Engine coolant temperature sensor cold start monitor

When a cold engine start is performed and then the engine is warmed up, if the engine coolant temperature 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.

Engine coolant temperature sensor soak monitor

If the engine coolant temperature 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 any of DTCs P0115, P0117 or P0118 are set simultaneously with DTC P0116, the engine coolant temperature 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 DTC OUTPUT (IN ADDITION TO DTC P0116)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester ON.

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

    5. Read the DTC.

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

      Tech Tips

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


    B

    GO TO DTC CHART Click here

    A

  2. INSPECT WATER INLET WITH THERMOSTAT


    1. Remove the water inlet with thermostat Click here.

    2. Check the valve opening temperature of the thermostat.

      Standard
      80°C to 84°C (176°F 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 with thermostat Click here.


    NG

    REPLACE WATER INLET WITH THERMOSTAT Click here

    OK

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here