ECD SYSTEM, 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.

The structure of the sensor and connection to the ECM is the same as the intake air temperature sensor.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0116

Engine Coolant Temperature Circuit Range / Performance Problem

  • When engine is started cold and warmed up, the engine coolant temperature sensor value does not change (2 trip detection logic).

  • After the warmed up engine is stopped and the next cold engine start is performed, the engine coolant temperature sensor value does not change (2 trip detection logic)

  • Thermostat

  • Engine coolant temperature sensor

Comes on

DTC stored
Table 1. Related Data List

DTC No.

Data List

P0116

Coolant Temp
Tip:

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

  • Misfire

  • Combustion noise

  • Black smoke

  • White smoke

  • Lack of power

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.

CONFIRMATION DRIVING PATTERN

DTC No.

DTC Detection Drive Pattern

P0116

With the engine coolant temperature below 60°C (140°F), start the engine and idle it for 5 minutes. Then drive the vehicle at a speed of 40 km/h (25 mph) or more for a total of 5 minutes or more and check that the engine coolant temperature changes by 1°C (1.8°F) or more.

CAUTION / NOTICE / HINT

Note:

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

Tip:

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 / Trouble Codes.

      Powertrain > Engine > Trouble Codes

    4. Read the DTCs.

      Result

      Proceed to

      DTC P0116 is output

      DTC P0116 and other DTCs are output
      Tip:

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

    DTC P0116 and other DTCs are output

    GO TO DTC CHART

    Click hereClick here

    DTC P0116 is output

  2. INSPECT THERMOSTAT

    1. Inspect the thermostat.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE THERMOSTATClick here

    OK

  3. REPLACE ENGINE COOLANT TEMPERATURE SENSOR

    1. Replace the engine coolant temperature sensor.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick 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 / Data List / Coolant Temp.

      Powertrain > Engine > Data List

      Tester Display

      Coolant Temp

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

    5. Start the engine.

    6. Idle the engine for 5 minutes, and then drive the vehicle at a speed of 40 km/h (25 mph) or more for a total of 5 minutes or more.

    7. Check that the engine coolant temperature changes by 1°C (1.8°F) or higher.

    Result

    Proceed to

    NEXT
    NEXT

    END