ECD SYSTEM(for CCo), Diagnostic DTC:P0116

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

DESCRIPTION

A thermistor is built into the engine coolant temperature sensor and it changes its resistance value according to the engine coolant temperature.

A thermistor is built into the engine coolant temperature sensor and it changes its resistance value according to the engine coolant temperature.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0116 Engine Coolant Temperature Circuit Range / Performance Problem

  • If the engine coolant temperature is between -40°C (-40°F) and 60°C (140°F) at engine start, and conditions (a) and (b) are met (2 trip detection logic):

    (a) Vehicle is driven at varying speeds (accelerating and decelerating) for 600 seconds.

    (b) Engine coolant temperature remains within 3°C (5.4°F) of the engine starting temperature.

  • If the engine coolant temperature is more than 60°C (140°F) at engine start, and conditions (a) and (b) are met (6 trip detection logic)*:

    (a) Vehicle is driven at varying speeds (accelerating and decelerating) for 600 seconds.

    (b) Engine coolant temperature remains within 1°C (1.8°F) of the engine starting temperature.

Tech Tips

*: Only for Euro-OBD

  • Thermostat

  • Engine coolant temperature sensor

 Comes on DTC stored
Related Data List
DTC No. Data List
P0116 Coolant Temp

Tech Tips

If DTC P0116 is stored, the following symptoms may appear:


  • Misfire

  • Combustion noise

  • Black smoke

  • White smoke

  • Lack of power

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P0116 City driving for 10 minutes or more after engine start with engine coolant temperature between -40°C (-40°F) and 60°C (140°F)

MONITOR DESCRIPTION

The engine coolant temperature sensor is used to monitor the engine coolant temperature. The engine coolant temperature sensor has a thermistor that varies its resistance depending on the temperature of the engine coolant. When the coolant temperature is low, the resistance of the thermistor increases.

When the temperature is high, the resistance drops. The variations in resistance are reflected in the voltage output from the sensor. The ECM monitors the sensor voltage and uses this value to calculate the engine coolant temperature. When the sensor voltage output varies slightly, the ECM interprets this as a fault in the engine coolant temperature sensor and stores a DTC.


    Examples:

  1. Upon starting the engine, the engine coolant temperature is between -40°C (-40°F) and 60°C (140°F). If, after driving for a few minutes, the engine coolant temperature still remains within 3°C (5.4°F) of the starting temperature, a DTC is stored (2 trip detection logic).

  2. Upon starting the engine, the engine coolant temperature is more than 60°C (140°F). If, after driving for a few minutes, the engine coolant temperature still remains within 1°C (1.8°F) of the starting temperature, a DTC is stored (6 trip detection logic)*.

    Tech Tips

    *: Only for Euro-OBD

CAUTION / NOTICE / HINT

Note

After replacing the ECM, the new ECM needs registration (Click here ) and initialization Click here.

Tech Tips

Read freeze frame data using the GTS. 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, and other data from the time the malfunction occurred.

PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    4. Read the DTCs.

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

      Tech Tips

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


    DTC P0116 and other DTCs are output

    GO TO DTC CHART Click here

    DTC P0116 is output

  2. INSPECT THERMOSTAT


    1. Inspect the thermostat.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE THERMOSTAT Click here

    OK

  3. REPLACE ENGINE COOLANT TEMPERATURE SENSOR


    1. Replace the engine coolant temperature sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 5 Click here

  4. REPLACE THERMOSTAT


    1. Replace the thermostat.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.


      Powertrain > Engine > Data List
      Tester Display
      Coolant Temp

    4. Start the engine.

    5. Run the engine at 2500 rpm with no load.

    6. Check that "Coolant Temp" changes by 1°C (1.8°F) or higher while idling the engine within 10 minutes.

      Result
      Proceed to
      NEXT

    NEXT

    END