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

When either of the following conditions is met

(2 trip detection logic):

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

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

  • Thermostat

  • Engine coolant temperature sensor

CAUTION / NOTICE / HINT

Tip:

  • If DTC P0115, P0117 or P0118 is 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.

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 and turn the GTS on.

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

    4. Read the DTCs.

      Table 1. Result

      Result

      Proceed to

      DTC P0116 is output

      A

      DTC P0116 and other DTCs are output

      B
      Tip:

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

    GO TO DTC CHART

    (Click here)

  2. INSPECT THERMOSTAT

    1. Remove the thermostat (Click here).

    2. Measure the valve opening temperature of the thermostat.

      Standard

      80°C to 84°C (176°F to 183°F)

      Tip:

      • In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.

      • Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (Click here).

    3. Reinstall the thermostat (Click here).

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR

    (Click here)

    REPLACE THERMOSTAT

    (Click here)