ECD SYSTEM, Diagnostic DTC:P1014

DTC Code DTC Name
P1014 Mass Air Flow Sensor Plausibility Check with Other Temperature Sensor when Cold Start

DESCRIPTION

This DTC is output when the value of the intake air temperature sensor (built into the mass air flow meter) in the ECM is determined to be inappropriate when making comparisons with values from other temperature sensors. This comparison is performed once per driving cycle after a cold start.

DTC No. DTC Detection Condition Trouble Area
P1014

When intake air temperature sensor (built into mass air flow meter) value determined to be inappropriate after comparison with other temperature sensors for 0.05 seconds or more

(3 trip detection logic)

  • Intake air temperature sensor (built into mass air flow meter)

  • ECM

INSPECTION PROCEDURE

Note


  • When replacing the ECM, the ECM needs Registration and Initialization Click here.

  • After replacing the mass air flow meter, the ECM needs initialization Click here.

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.

  • 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1014)


    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.

      Result
      Result Proceed to
      DTC P1014 A
      DTC P1014 and other DTCs B

      Tech Tips

      If any DTCs other than P1014 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. REPLACE MASS AIR FLOW METER


    1. Replace the mass air flow meter Click here.

    2. Perform the air flow meter learning value reset Click here.


    NEXT

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P1014)


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

    8. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P1014 B

    B

    REPLACE ECM Click here

    A

    END

  4. REPLACE ECM


    1. Replace the ECM Click here.


    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. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

    8. Confirm that the DTC is not output again.


    NEXT

    END