ECD SYSTEM, Diagnostic DTC:P1012

DTC Code DTC Name
P1012 Exhaust Gas Temp Sensor to EGR Cooler Plausibility Check with Other Temp Sensor when Cold Start

DESCRIPTION

This DTC is output when the value of the EGR gas temperature sensor 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.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P1012

Exhaust Gas Temp Sensor to EGR Cooler Plausibility Check with Other Temp Sensor when Cold Start

When EGR gas temperature sensor value determined to be inappropriate after comparison with other temperature sensors for 0.05 seconds or more.

(3 trip detection logic)

  • EGR gas temperature sensor

  • ECM

Does not come on

DTC stored

CAUTION / NOTICE / HINT

Note:

When replacing the ECM, the ECM needs registration and initialization.

Click here

Tip:

  • 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 GTS 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 P1012)

    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.

      Powertrain > Engine and ECT > Trouble Codes

    4. Read the DTCs.

      Result

      Result

      Proceed to

      DTC P1012

      A

      DTC P1012 and other DTCs

      B
      Tip:

      If any DTCs other than P1012 are output, troubleshoot those DTCs first.

    B

    GO TO DTC CHART

    Click hereClick hereClick here

    A

  2. REPLACE EGR GAS TEMPERATURE SENSOR

    1. Replace the EGR gas temperature sensor.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P1012)

    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    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: Powertrain / Engine and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    8. Read the DTCs.

      Result

      Result

      Proceed to

      No DTC output

      A

      DTC P1012

      B
    A

    END

    B

  4. REPLACE ECM

    1. Replace the ECM.

      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. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    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.

      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

    Result

    Proceed to

    NEXT
    NEXT

    END