ECD SYSTEM, Diagnostic DTC:P2002

DTC Code DTC Name
P2002 Particulate Trap Efficiency Below Threshold (Bank1)

DESCRIPTION

A DPF (Diesel Particulate Filter) catalyst is located in the exhaust pipe. A wall-flow type DPF catalyst, which filters all exhaust gas through ceramic walls with high heat resistance, is used to allow the exhaust gas to be organized by the catalyst when flowing through the porous ceramic structure, reducing PM (Particulate Matter) drastically.

A01CHO2E01
DTC No. DTC Detection Condition Trouble Area
P2002

  • Differential pressure sensor detects abnormally high differential pressure while vehicle is running.

  • Exhaust gas temperature sensor detects abnormally high temperature while vehicle is running.

  • Vehicle is driven continuously without performing forcible regeneration function although DPF switch light is blinking, and amount of accumulated PM exceeds specified value.

  • During forcible regeneration function, temperature of monolithic converter assembly does not increase although injection volume is as specified.

  • Exhaust gas temperature sensor

  • Differential pressure sensor

  • DPF manifold converter

  • Open or short in differential pressure sensor circuit

  • Open or short in exhaust gas temperature sensor circuit

  • ECM

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

Tech Tips


  • Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

  • If the amount of accumulated PM exceeds the specified value, DTC P2002 is set and the system enters fail-safe mode, in which the system limits the engine power.

  • Check the amount of engine oil after troubleshooting is finished.

  • If the amount of engine oil is more than the specified level, replace the engine oil.

PROCEDURE


  1. INSPECT DPF SWITCH


    1. Use the table below to troubleshoot each problem symptom.

      Result
      Condition Proceed to
      DPF switch light is not blinking A
      DPF switch light is blinking B

    B

    READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE) Click here

    A

  2. CHECK OTHER DTC OUTPUT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position.

    3. Turn the tester on.

    4. Enter the following menu items: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs.

      Result
      Display (DTC Output) Proceed to
      P2002 A
      P2002 and other DTCs B

    B

    GO TO DTC CHART

    A

  3. READ VALUE USING FREEZE FRAME DATA (EXHAUST GAS TEMPERATURE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position.

    3. Turn the tester on.

    4. Enter the following menu items: Powertrain / Engine and ECT / DTC / P2002.

    5. Read the value.

      Result
      Item Exhaust Temperature Proceed to
      Exhaust Temp (IN) Less than 740°C (1364°F) A
      Exhaust Temp (OUT) Less than 940°C (1724°F) A
      Exhaust Temp (IN) 740°C (1364°F) or more B
      Exhaust Temp (OUT) 940°C (1724°F) or more C

      Tech Tips

      When troubleshooting abnormal temperature detection by exhaust temperature sensor (upstream), check that the hose between the turbocharger and the intake manifold is connected properly.


    B

    GO TO ABNORMAL TEMPERATURE DETECTION BY EXHAUST TEMPERATURE SENSOR (DOWNSTREAM)

    C

    GO TO ABNORMAL TEMPERATURE DETECTION BY EXHAUST TEMPERATURE SENSOR (UPSTREAM)

    A

  4. READ VALUE USING FREEZE FRAME DATA (DIFFERENTIAL PRESSURE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position.

    3. Turn the tester on.

    4. Enter the following menu items: Powertrain / Engine and ECT / DTC / P2002.

    5. Read the value.

      Result
      Item Differential Pressure Proceed to
      DPF Differential Pressure 15 kPa or less A
      DPF Differential Pressure 15 kPa or more B

    B

    GO TO CLOGGING BY DPF CATALYTIC CONVERTER

    A

    GO TO CLOGGING BY DPF CATALYTIC CONVERTER (GO TO STEP8)

  5. READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE)


    1. Warm up the engine.

    2. Disconnect the negative battery terminal and wait for at least 1 minute.

    3. Reconnect the negative battery terminal.

    4. Initialize the learning value of the supply pump Click here.

      Tech Tips

      Perform initialization with the engine warmed up (engine coolant temperature is 60°C (140°F) or more and fuel temperature is 20°C (68°F) or more).

    5. Initialize the learning value of the diesel throttle body Click here.

    6. Allow the engine to idle for at least 5 minutes.

    7. Connect the intelligent tester to the DLC3.

    8. Turn the ignition switch to the ON position.

    9. Turn the tester on.

    10. Enter the following menu items: Powertrain / Engine and ECT / Data List / DPF Differential Pressure.

      Tech Tips


      • If the exhaust gas temperature is high, the differential pressure cannot be measured correctly.

      • If the differential pressure is outside the normal range, the monolithic converter assembly may have deteriorated or the monolithic converter assembly may be clogged with PM.

      • If DTC P2002 is set, the engine speed cannot be raised to the high-speed range because the engine output limiting control is performed. If this occurs, replace the catalyst converter assembly Click here.

      • If DTC P2002 is set, be sure to clear the DTCs.

      Result
      Engine Speed (no engine load) Differential Pressure Proceed to
      3500 to 3600 rpm (Exhaust gas temperature (up stream) is 200°C (392°F) or less) 30 kPa or more A
      3500 to 3600 rpm (Exhaust gas temperature (up stream) is 200°C (392°F) or less) 30 kPa or less B

    B

    READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE) Click here

    A

  6. CLEAN EXHAUST SYSTEM


    1. Clean the catalytic converter and monolithic converter Click here.


    NEXT

  7. READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE)


    1. Allow the engine to idle for at least 5 minutes.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to the ON position.

    4. Turn the tester on.

    5. Enter the following menu items: Powertrain / Engine and ECT / Data List / DPF Differential Pressure.

      Tech Tips


      • If the exhaust gas temperature is high, the differential pressure cannot be measured correctly.

      • If the differential pressure is outside the normal range, the monolithic converter assembly may have deteriorated or the monolithic converter assembly may be clogged with PM.

      • If DTC P2002 is set, the engine speed cannot be raised to the high-speed range because the engine output limiting control is performed. If this occurs, replace the catalyst converter assembly Click here.

      • If DTC P2002 is set, be sure to clear the DTCs.

      Result
      Engine Speed (no engine load) Differential Pressure Proceed to
      3500 to 3600 rpm (Exhaust gas temperature (up stream) is 200°C (392°F) or less) 30 kPa or less A
      3500 to 3600 rpm (Exhaust gas temperature (up stream) is 200°C (392°F) or less) 30 kPa or more B

    B

    REPLACE CENTER EXHAUST PIPE ASSEMBLY

    A

  8. READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE)


    1. Perform the forcible regeneration function Click here.

    2. After the forcible regeneration is completed, allow the engine to idle for at least 5 minutes.

    3. Enter the following menu items: Powertrain / Engine and ECT / Data List / DPF Differential Pressure.

    4. Check the differential pressure when the exhaust gas temperature sensor indicates 200°C or less.

      Result
      Engine Speed (no engine load) Differential Pressure Proceed to
      3500 to 3600 rpm (Exhaust gas temperature (up stream) is 200°C (392°F) or less) 15 kPa or less A
      3500 to 3600 rpm (Exhaust gas temperature (up stream) is 200°C (392°F) or less) 15 kPa or more B

    B

    REPLACE CENTER EXHAUST PIPE ASSEMBLY

    A

    END

  9. READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE)


    1. Perform the forcible regeneration function Click here.

    2. After the forcible regeneration is completed, allow the engine to idle for at least 5 minutes.

    3. Enter the following menu items: Powertrain / Engine and ECT / Data List / DPF Differential Pressure.

    4. Check the differential pressure when the exhaust gas temperature sensor indicates 200°C or less.

      Result
      Engine Speed (no engine load) Differential Pressure Proceed to
      3500 to 3600 rpm (Exhaust gas temperature (up stream) is 200°C (392°F) or less) 15 kPa or less A
      3500 to 3600 rpm (Exhaust gas temperature (up stream) is 200°C (392°F) or less) 15 kPa or more B

    B

    REPLACE CENTER EXHAUST PIPE ASSEMBLY

    A

    END