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. DTC Detection Condition Trouble Area
P1012

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

CAUTION / NOTICE / HINT

Note

When replacing the ECM, the ECM needs Registration and 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 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.

    4. Read the DTCs.

      Result
      Result Proceed to
      DTC P1012 A
      DTC P1012 and other DTCs B

      Tech Tips

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


    B
    A
  2. REPLACE EGR GAS TEMPERATURE SENSOR


    1. Replace the EGR gas temperature sensor Click here.


    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 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: Powertrain / Engine and ECT / Trouble Codes.

    8. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P1012 B

    A
    B
  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