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 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.

  • Thermostat

  • Engine coolant temperature sensor

For Mexico Models:

Case 1:

Engine coolant temperature between 35 and 60°C (95 and 140°F) when engine started, and conditions (a) and (b) are met (2 trip detection logic):


  • (a) Vehicle driven at varying speeds (accelerated and decelerated)

  • (b) Engine coolant temperature remains within 3°C (5.4°F) of initial engine coolant temperature

Case 2:

Engine coolant temperature higher than 60°C (140°F) when engine started, and conditions (a) and (b) are met (6 trip detection logic):


  • (a) Vehicle driven at varying speeds (accelerated and decelerated)

  • (b) Engine coolant temperature measurements remain within 1°C (1.8°F) of initial engine coolant temperature

  • 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 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 a DTC is stored.

Engine Coolant Temperature Sensor High Side Stuck Monitor (Only for Mexico Models)

The ECM monitors the sensor voltage and uses this value to calculate the engine coolant temperature. If the sensor voltage output deviates from the normal operating range, the ECM interprets this deviation as a malfunction in the engine coolant temperature sensor and stores the DTC.


MONITOR STRATEGY

Related DTCs

P0116: Engine coolant temperature sensor rationality (cold start monitor)

P0116: Engine coolant temperature sensor rationality (soak monitor)
Required Sensors/Components (Main) Engine coolant temperature sensor
Required Sensors/Components (Related) -
Frequency of Operation Once per driving cycle
Duration

-: Cold start monitor

10 seconds: Soak monitor
MIL Operation 2 driving cycles
Sequence of Operation None

TYPICAL ENABLING CONDITIONS

All
Monitor runs whenever the following DTCs are not stored None
Cold Start Monitor
All of the following conditions are met -
Battery voltage 10.5 V or higher
Time after engine start 1 second or more
Engine coolant temperature at engine start Less than 60°C (140°F)
Soak time 0 seconds or more
Accumulated mass air flow 8224 g or more
Fuel cut Off
Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125) Not detected
Intake air temperature sensor circuit fail (P0112, P0113) Not detected
Thermostat fail (P0128) Not detected
Difference between engine coolant temperature at engine start and intake air temperature Less than 40°C (72°F)
Soak Monitor
All of the following conditions are met -
Battery voltage 10.5 V or higher
Engine Running
Soak time 5 hours or more
Either of the following conditions is met (a) or (b)
(a) Engine coolant temperature 60°C (140°F) or higher
(b) Accumulated mass air flow 16448 g or more
Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125) Not detected
Intake air temperature sensor circuit fail (P0112, P0113) Not detected
Thermostat fail (P0128) Not detected
Soak timer fail (P2610) Not detected

TYPICAL MALFUNCTION THRESHOLDS

Cold Start Monitor
Engine coolant temperature sensor value change Less than 5°C (9°F)
Soak Monitor
Difference between current engine coolant temperature sensor value and previous engine coolant temperature sensor value when engine stopped Less than 5°C (9°F) (varies with engine coolant temperature of last trip engine stop)

COMPONENT OPERATING RANGE

Engine coolant temperature Engine coolant temperature sensor value changes in accordance with actual engine coolant temperature

CONFIRMATION DRIVING PATTERN

A01I1WZE28

  1. Connect the Techstream to the DLC3.

  2. Turn the engine switch on (IG) and turn the Techstream on.

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

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

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

  6. Turn the engine switch off and wait for at least 30 seconds.

  7. Turn the engine switch on (IG) and turn the Techstream on [A].

  8. 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.

  9. Enter the following menus: Powertrain / Engine / Trouble Codes [C].

  10. 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.

  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  12. Input the DTC: P0116.

  13. Check the DTC judgment result.

    Techstream 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].

  14. 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.

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

    Tech Tips

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

  16. If no pending DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


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

    • If no permanent DTC is output, the system is normal.

for Mexico Models
A01HXOVE06

  1. Connect the Techstream to the DLC3.

  2. Turn the engine switch on (IG) and turn the Techstream on.

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

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

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

  6. Turn the engine switch off and wait for at least 30 seconds.

  7. Turn the engine switch on (IG) and turn the Techstream on [A].

  8. Start the engine.

  9. 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.

  10. Enter the following menus: Powertrain / Engine / Trouble Codes [C].

  11. 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.

  12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  13. Input the DTC: P0116.

  14. Check the DTC judgment result.

    Techstream 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.

  15. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


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

    • If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

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 Techstream. 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 Techstream. Enter the following menus: Powertrain / Engine / Data List / Primary / 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 Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

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


    NG

    REPLACE THERMOSTAT Click here

    OK

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here