SFI SYSTEM, Diagnostic DTC:P0116

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

DESCRIPTION

Refer to DTC P0115.

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

For Euro-OBD

Either of the following conditions 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 then next cold engine start is performed, the engine coolant temperature sensor value does not change.

For Except Euro-OBD


  • Engine coolant temperature between -40°C and 60°C (-40°F and 140°F) when engine started, and conditions (a) and (b) met (2 trip detection logic):


    1. Vehicle driven at varying speeds (accelerated and decelerated).

    2. Engine coolant temperature remains within 3°C (5.4°F) of initial engine coolant temperature.

  • Thermostat

  • Engine coolant temperature sensor

 Comes on DTC stored

MONITOR DESCRIPTION


  1. For Euro-OBD


    • 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 this DTC is stored.


    • 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 this DTC is stored.

  2. For Except Euro-OBD

    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 the DTC is stored.

MONITOR STRATEGY

For Euro-OBD
Required Sensors/Components Engine coolant temperature sensor
Frequency of Operation Once per driving cycle
For Except Euro-OBD
Required Sensors/Components (Main) Engine coolant temperature sensor
Required Sensors/Components (Related) None
Frequency of Operation Once per driving cycle

CONFIRMATION DRIVING PATTERN


  1. For Euro-OBD


    1. A0048U3E01

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

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

    6. Check that the engine coolant temperature is 60°C (140°F) or less.

    7. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

    8. Turn the ignition switch off and wait for at least 30 seconds.

    9. Turn the ignition switch to ON.

    10. Turn the GTS on [A].

    11. Start the engine and idle it for 5 minutes or more [B].

      Tech Tips

      If the engine coolant temperature does not change by 5°C (9°F) or higher, the engine coolant temperature sensor is malfunctioning. It is not necessary to continue this procedure.

    12. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].

    13. Read the pending DTCs.

      Tech Tips


      • If a pending DTC is output, the system is malfunctioning.

      • If a pending DTC is not output, perform the following procedure.

    14. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    15. Input the DTC: P0116.

    16. Check the DTC judgment result.

      GTS Display Description
      NORMAL

      • DTC judgment completed

      • System normal
      ABNORMAL

      • DTC judgment completed

      • System abnormal
      INCOMPLETE

      • DTC judgment not completed

      • Perform driving pattern after confirming DTC enabling conditions
      N/A

      • Unable to perform DTC judgment

      • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

      Tech Tips


      • If the judgment result shows NORMAL, the system is normal.

      • If the judgment result shows ABNORMAL, the system has a malfunction.

      • If the judgment result shows INCOMPLETE or N/A, perform steps [D] and [E].

    17. Drive the vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more [D].

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Tech Tips

      In the event of the drive pattern being interrupted (possibly due to factors such as traffic conditions), the drive pattern can be resumed.

    18. Check the DTC judgment result again [E].

      Tech Tips

      If the judgment result shows INCOMPLETE or N/A, perform steps [D] and [E] again.

  2. For Except Euro-OBD


    1. A004AF2E11

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

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

    6. Check that the engine coolant temperature is 60°C (140°F) or less.

    7. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

    8. Turn the ignition switch off and wait for at least 30 seconds.

    9. Turn the ignition switch to ON.

    10. Turn the GTS on [A].

    11. Start the engine.

    12. Drive the vehicle at varying speeds (accelerated and decelerated more than 10 times) for 5 minutes or more [B].

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Tech Tips

      In the event of the drive pattern being interrupted (possibly due to factors such as traffic conditions), the driving pattern can be resumed.

    13. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].

    14. Read the pending DTCs.

      Tech Tips


      • If a pending DTC is output, the system is malfunctioning.

      • If a pending DTC is not output, perform the following procedure.

    15. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    16. Input the DTC: P0116.

    17. Check the DTC judgment result.

      GTS Display Description
      NORMAL

      • DTC judgment completed

      • System normal
      ABNORMAL

      • DTC judgment completed

      • System abnormal
      INCOMPLETE

      • DTC judgment not completed

      • Perform driving pattern after confirming DTC enabling conditions
      N/A

      • Unable to perform DTC judgment

      • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

      Tech Tips


      • If the judgment result shows NORMAL, the system is normal.

      • If the judgment result shows ABNORMAL, the system has a malfunction.

      • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and the DTC judgment result again.

CAUTION / NOTICE / HINT

Tech Tips


  • If any of DTCs P0115, P0117 or P0118 are output 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 GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

  • When the DTC is output, check the engine coolant temperature using the GTS. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp. If the Coolant Temp value is lower than the actual engine coolant temperature, the engine coolant temperature sensor circuit may be malfunctioning. In this case, check the wire harnesses and connectors (and those connections) between the ECM and the engine coolant temperature sensor first.

PROCEDURE


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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the DTCs.

      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 THERMOSTAT


    1. Inspect the thermostat (thermostat opening temperature).

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    NG

    REPLACE THERMOSTAT Click here