ECD SYSTEM(w/ DPF), Diagnostic DTC:P244B, P2465

DTC Code DTC Name
P244B Diesel Particulate Filter Differential Pressure Too High
P2465 Diesel Particulate Filter Differential Pressure Too High Bank 2

DESCRIPTION

Refer to DTC P244C Click here.

P244B (Bank 1), P2465 (Bank 2)
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine is running at 4000 rpm with no load for 10 seconds or more.

While driving, Catalyst Differential Pressure becomes more than 0.45 for 3 seconds.

(1 trip detection logic)

  • Front exhaust pipe assembly (for bank 1 DPF catalytic converter)

  • Front No. 2 exhaust pipe assembly (for bank 2 DPF catalytic converter)

  • Differential pressure sensor assembly (for bank 1)

  • Differential pressure sensor assembly (for bank 2)

Common Inspection Item:


  • Fuel injection system

  • Intake/exhaust system

  • After treatment control system
Related Data List
DTC No. Data List
P244B

  • DPF Differential Pressure

  • Catalyst Differential Press

  • Exhaust Fuel Addition FB
P2465

  • DPF Differential Pressure #2

  • Catalyst Differential Press #2

  • Exhaust Fuel Addition FB #2

MONITOR DESCRIPTION

The ECM compares pressure upstream and downstream of the DPF catalyst converter to monitor the differential pressure. If the differential pressure is large, the ECM determines that the DPF catalyst converter is contaminated or has deteriorated and illuminates the MIL.

A01X9SQE02

CAUTION / NOTICE / HINT

Note


  • After replacing the ECM, the new ECM needs registration (See page ) and initialization Click here.

  • After replacing the fuel supply pump assembly, the ECM needs initialization Click here.

  • After replacing an injector assembly, the ECM needs registration Click here.

Tech Tips

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. READ OUTPUT DTC (RECORD STORED DTC AND FREEZE FRAME DATA)


    1. Connect the GTS to the DLC3.

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

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

    4. Record the stored DTC and freeze frame data.

    5. Check Exhaust Fuel Addition FB, Exhaust Fuel Addition FB #2, Catalyst Differential Press and Catalyst Differential Press #2 in the freeze frame data.

      Tech Tips


      • When the Exhaust Fuel Addition FB and Exhaust Fuel Addition FB #2 values are 1.45 or more, it indicates a high possibility of insufficient temperature increase during PM forced regeneration.

      • When the Catalyst Differential Press and Catalyst Differential Press #2 values are 0.45 or more, it indicates a high possibility that the DPF catalyst is clogged.


    NEXT

  2. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P244B OR P2465)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the DTCs.

      Result
      Result Proceed to
      P244B or P2465 is output A
      P244B or P2465 is output at the same time as P2463*
      Other relevant DTCs are output B

      Tech Tips

      *: When P244B or P2465 is output at the same time as P2463, perform this diagnostic procedure. When DTC P244B or P2465 is not output at the same time as P2463 is output, perform the diagnostic procedure for P244C or P244E Click here.


    B

    GO TO DTC CHART Click here

    A

  3. READ VALUE USING GTS (DPF DIFFERENTIAL PRESSURE)


    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Enter the following menus: Engine and ECT / Data List / DPF Differential Pressure and DPF Differential Pressure #2.

    4. Check the DPF Differential Pressure and DPF Differential Pressure #2 values from idle speed to unloaded maximum engine speed.

      Result
      Result Proceed to
      DPF Differential Pressure and DPF Differential Pressure #2 increase as engine speed increases from idle speed A
      Except above B
      A01X5JUE04

      Tech Tips

      If DPF Differential Pressure and DPF Differential Pressure #2 indicate negative pressure for approx. 1 second as shown in the illustration (A) when the engine speed increases, the differential pressure sensor piping of the DPF catalyst may be clogged.


    A

    CHECK FOR BLACK SMOKE Click here

    B

  4. CLEAN OR REPLACE VACUUM TRANSMITTING HOSE


    1. Even though it has been determined that the vacuum transmitting hose needs to be repaired or cleaned, make sure to perform all diagnostic procedures for DTC P244B or P2465 before repairing or cleaning it.


    NEXT

  5. CHECK FOR BLACK SMOKE


    1. Start the engine and drive the vehicle until the engine coolant temperature reaches 75°C (167°F) or higher.

    2. Stop the vehicle and allow the engine to idle.

    3. Fully depress the accelerator pedal for 5 seconds, and then release it [A].

    4. Repeat the above procedure [A] 10 times [B].

    5. Check for black smoke emission during procedures [A] and [B].

      OK
      Black smoke is emitted less than 5 times.

      Tech Tips

      Even if the black smoke is very thin, count the number of black smoke emissions if there is any visible smoke.


    NG

    REPLACE EXHAUST PIPE ASSEMBLY (DPF CATALYST CONVERTER) Click here

    OK

  6. READ VALUE USING GTS (CATALYST DIFFERENTIAL PRESS)


    1. Connect the GTS to the DLC3.

    2. Start the engine and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Catalyst Differential Press and Catalyst Differential Press #2.

    4. Check the value of Catalyst Differential Press and Catalyst Differential Press #2 at 4000 rpm without load.

      Result
      Result Proceed to
      Catalyst Differential Press or Catalyst Differential Press #2 is more than 0.45 A
      Except above B

    A

    REPLACE EXHAUST PIPE ASSEMBLY (DPF CATALYST CONVERTER) Click here

    B

  7. PERFORM PM FORCED REGENERATION


    1. Remove the EFI MAIN fuse or disconnect the cable from the battery terminal for 60 seconds or more, and then reinstall the EFI MAIN fuse or reconnect the cable to the battery terminal.

      Tech Tips


      • The amount of built up particulate matter recorded by the ECM cannot be initialized by the GTS.

      • If the amount of built up particulate matter recorded by the ECM is not initialized, PM forced regeneration cannot be performed using the GTS.

    2. Connect the GTS to the DLC3.

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

    4. Clear the DTCs Click here.

    5. Start the engine.

    6. Enter the following menus: Engine and ECT / Data List / Coolant Temp.

    7. Warm up the engine (engine coolant temperature is 70°C (158°F) or higher).

    8. Perform PM forced regeneration Click here.

    9. Turn the ignition switch off.


    OK

    END

    NG

    CHECK FUEL INJECTION SYSTEM Click here

  8. REPLACE EXHAUST PIPE ASSEMBLY (DPF CATALYST CONVERTER)

    Even though it has been determined that the DPF catalyst converter needs to be replaced, make sure to perform all diagnostic procedures for DTC P244B or P2465 before replacing it.


    NEXT

    CHECK FUEL INJECTION SYSTEM Click here

  9. GO TO DTC CHART


    1. Perform inspection and repair of relevant DTCs Click here.


    NEXT

  10. CHECK FUEL INJECTION SYSTEM


    1. Check the fuel injection system Click here.


    NEXT

  11. CHECK INTAKE / EXHAUST SYSTEM


    1. Check the intake/exhaust system Click here.


    NEXT

  12. CHECK AFTER TREATMENT CONTROL SYSTEM


    1. Check the after treatment control system Click here.


    NEXT

  13. REPAIR OR REPLACE MALFUNCTIONING PARTS

    Tech Tips


    • Repair, replace or clean the following items only when it has been determined necessary based on diagnosis for DTC P244B or P2465.

    • Replace the DPF catalytic converter for bank 1 and bank 2 at the same time.

    When DTC P244B is output:


    • Clean and/or repair the hoses of the differential pressure sensor (for bank 1).

    • Replace the exhaust pipe assembly (for bank 1 DPF catalytic converter) Click here.

    • Replace the front No. 2 exhaust pipe assembly (for bank 2 DPF catalytic converter) Click here.

    When DTC P2465 is output:


    • Clean and/or repair the hoses of the differential pressure sensor (for bank 2).

    • Replace the exhaust pipe assembly (for bank 1 DPF catalytic converter) Click here.

    • Replace the front No. 2 exhaust pipe assembly (for bank 2 DPF catalytic converter) Click here.


    NEXT

  14. CATALYST RECORD CLEAR


    1. Perform the catalyst record clear Click here.


    NEXT

  15. 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. Perform PM forced regeneration Click here.


    NEXT

    END