ECD SYSTEM (w/ EGR Cooler Bypass Valve), Diagnostic DTC:P0168

DTC Code DTC Name
P0168 Fuel Temperature Too High

DESCRIPTION

Refer to DTC P0180 on page Click here.

DTC No. DTC Detection Condition Trouble Area
P0168

  • If fuel temperature is between 35°C (95°F) and 60°C (140°F) at engine start, and conditions (a) and (b) are met:

    (1 trip detection logic)


    1. Vehicle is driven at varying speeds (under acceleration and deceleration)

    2. Fuel temperature remains within 3°C (37.4°F) of engine starting temperature

 Fuel temperature sensor
P0168

  • If fuel temperature was more than 60°C (140°F) at engine start, and conditions (a) and (b) are met:

    (1 trip detection logic)


    1. Vehicle is driven at varying speeds (under acceleration and deceleration)

    2. fuel temperature remains within 1°C (33.8°F) of engine starting temperature, and this is successively recorded 6 times

 Fuel temperature sensor

INSPECTION PROCEDURE

Tech Tips


  • If DTC P0180, P0182 or P0183 is set simultaneously with P0168, the fuel temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0168)


    1. Connect an intelligent tester to the DLC3.

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

    3. Select the following menus: Powertrain / Engine and ECT / DTC.

    4. Read DTCs.

      Result
      Display (DTC Output) Proceed to
      P0168 A
      P0168 and other DTCs B

      Tech Tips

      If any DTCs other than P0168 are output, perform the troubleshooting for those codes first.


    B

    GO TO DTC CHART Click here

    A

    REPLACE SUPPLY PUMP ASSEMBLY Click here