ECD SYSTEM, Diagnostic DTC:P2002

DTC Code DTC Name
P2002 Diesel Particulate Filter Efficiency Below Threshold Bank 1

DESCRIPTION

Tech Tips

For more information on the diesel particulate filter (DPF) catalyst regeneration control, refer to System Description.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2002 Diesel Particulate Filter Efficiency Below Threshold Bank 1

The fault is detected when the quotient of the integrated differential pressure and the integrated threshold value falls below a limit value.

(3 trip detection logic)

  • Differential pressure sensor

  • Open or short in differential pressure sensor circuit

  • Exhaust manifold converter sub-assembly (DPF catalytic converter)

  • Air hose

  • ECM

 Comes on DTC stored
Related Data List
DTC No. Data List
P2002 Adaptation Value of Differential Pressure at Particle Filter

CAUTION / NOTICE / HINT

Note


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

    Click here

  • After replacing the DPF catalyst, the ECM needs initialization.

    Click here

  • After replacing the differential pressure sensor, 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 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 HARNESS AND CONNECTOR (DIFFERENTIAL PRESSURE SENSOR - ECM)


    1. Disconnect the differential pressure sensor connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      B127-1 (VC) - B112-70 (VCPX) Always Below 1 Ω
      B127-2 (PEX) - B112-85 (PEX) Always Below 1 Ω
      B127-3 (E2) - B112-71 (EPEX) Always Below 1 Ω
      B127-1 (VC) or B112-70 (VCPX) - Body ground Always 10 kΩ or higher
      B127-2 (PEX) or B112-85 (PEX) - Body ground Always 10 kΩ or higher
      B127-3 (E2) or B112-71 (EPEX) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (VC VOLTAGE)

    A01QRM3C26
    *a

    Front view of wire harness connector

    (to Differential Pressure Sensor)

    1. Disconnect the differential pressure sensor connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B127-1 (VC) - B127-3 (E2) Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ECM Click here

    OK

  3. CHECK DIFFERENTIAL PRESSURE SENSOR AIR HOSE CONNECTION


    1. Check hose pipes between exhaust system and differential pressure sensor. (for correct installation, arrangement (kinks), permeability (coking possible) and cracks).

      OK
      Part is securely installed.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT AIR HOSE Click here

    OK

  4. CHECK EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (DPF CATALYTIC CONVERTER)


    1. Check that the DPF catalytic converter is installed.

      OK
      DPF catalytic converter is installed.

      Tech Tips

      If the DPF catalytic converter is not installed, the exhaust tailpipe turns black from soot.

    2. Check that the DPF catalytic converter is not damaged.

      OK
      DPF catalytic converter is not damaged.

      Tech Tips

      If the DPF catalytic converter is not installed, the exhaust tailpipe turns black from soot.


      • If the DPF catalytic converter is damaged, the exhaust tailpipe and edge of the filter turn black from soot.

      • Disconnect the front exhaust pipe assembly from the exhaust manifold converter sub-assembly (DPF catalytic converter) and check for soot stuck inside the exhaust manifold converter sub-assembly (DPF catalytic converter).

      Result
      Proceed to
      OK
      NG

    NG

    INSTALL OR REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (DPF CATALYTIC CONVERTER) Click here

    OK

  5. REPLACE DIFFERENTIAL PRESSURE SENSOR


    1. Replace the differential pressure sensor.

      Click here

    2. Perform the differential pressure learning value reset.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P2002)


    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 P2002 B

    A

    END

    B

    GO TO STEP 9 Click here

  7. INSTALL OR REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (DPF CATALYTIC CONVERTER)


    1. Install or replace the exhaust manifold converter sub-assembly (DPF catalytic converter).

      Click here

    2. Perform DPF history information reset and NOx storage catalyst learning value reset.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  8. CONNECT AIR HOSE


    1. Install the air hose.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  9. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  10. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

  11. 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: Powertrain / 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