ECD SYSTEM, Diagnostic DTC:P244A, P244B, P2458, P2463, P24A2

DTC Code DTC Name
P244A Diesel Particulate Filter Differential Pressure Too Low
P244B Diesel Particulate Filter Differential Pressure Too High
P2458 Diesel Particulate Filter Regeneration Duration
P2463 Diesel Particulate Filter Restriction - Soot Accumulation
P24A2 Excessive Amount of Fuel Added During DPF Regeneration

DESCRIPTION

A DPF (Diesel Particulate Filter) catalyst is located in the center exhaust pipe assembly. 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.

A01CIAGE01
P244A
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
After warming up the engine coolant to 70°C (158°F) or higher, the engine is running at 3000 rpm with no load for 30 seconds or more. While driving, Catalyst Differential Pressure becomes equal to or less than the threshold (1 trip detection logic).

  • Exhaust gas temperature sensor

  • Differential pressure sensor assembly

  • Center exhaust pipe assembly (DPF catalyst converter)

  • Open or short in differential pressure sensor assembly circuit

  • Open or short in exhaust gas temperature sensor circuit

  • ECM
P244B
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
After warming up the engine coolant to 70°C (158°F) or higher, the engine is running at 3000 rpm with no load for 30 seconds or more. While driving, Catalyst Differential Pressure becomes equal to or less than the threshold (1 trip detection logic).

  • Exhaust gas temperature sensor

  • Differential pressure sensor assembly

  • Center exhaust pipe assembly (DPF catalyst converter)

  • Open or short in differential pressure sensor assembly circuit

  • Open or short in exhaust gas temperature sensor circuit

  • ECM
P2458
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Forced PM regeneration control During forcible regeneration function, temperature of center exhaust pipe assembly (catalyst converter) does not increase although injection volume is as specified (1 trip detection logic).

  • Exhaust gas temperature sensor

  • Differential pressure sensor assembly

  • Center exhaust pipe assembly (DPF catalyst converter)

  • Open or short in differential pressure sensor assembly circuit

  • Open or short in exhaust gas temperature sensor circuit

  • ECM
P2463
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
- While driving, PM accumulation amount exceeds the limit (1 trip detection logic).

  • Exhaust gas temperature sensor

  • Differential pressure sensor assembly

  • Center exhaust pipe assembly (DPF catalyst converter)

  • Open or short in differential pressure sensor assembly circuit

  • Open or short in exhaust gas temperature sensor circuit

  • ECM
P24A2
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Forced PM regeneration control During forcible regeneration function, temperature of center exhaust pipe assembly (catalyst converter) does not increase although injection volume is as specified (1 trip detection logic).

  • Exhaust gas temperature sensor

  • Differential pressure sensor assembly

  • Center exhaust pipe assembly (DPF catalyst converter)

  • Open or short in differential pressure sensor assembly circuit

  • Open or short in exhaust gas temperature sensor circuit

  • ECM

INSPECTION PROCEDURE

Note


  • Using the intelligent tester to clear DTC P244A, P244B, P2458, P2463 and/or P24A2 will cause the DTC to be output again. Therefore, make sure to clear the DTC by removing a fuse or disconnecting the cable from the negative (-) battery terminal Click here.

  • When clearing DTC P244B and/or P2463, the DTC will be output again if the PM accumulation history data is not cleared. Therefore, make sure to clear the PM accumulation history data first Click here.

  • When clearing DTCs, make sure to clear the engine history data at the same time Click here.

  • 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 moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

  • If the amount of accumulated PM exceeds the specified value, DTC P244A, P244B, P2458, P2463 and/or P24A2 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 ASSEMBLY


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

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

    B

    READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE) Click here

    A

  2. CHECK OTHER DTC OUTPUT


    1. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / DTC.

    6. Read the DTCs.

      Result
      Result Proceed to
      DTC P244A, P244B, P2458, P2463 and/or P24A2 is output A
      DTC P244A, P244B, P2458, P2463 and/or P24A2 and other DTCs are output B

    B

    GO TO DTC CHART Click here

    A

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


    1. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / DTC / P244A, P244B, P2458, P2463 and/or P24A2.

    6. Read the value.

      Result
      Item Exhaust Temperature Proceed to
      Exhaust Temperature B1S1 Less than 740°C (1364°F) A
      Exhaust Temperature B1S2 Less than 940°C (1724°F) A
      Exhaust Temperature B1S1 740°C (1364°F) or more B
      Exhaust Temperature B1S2 940°C (1724°F) or more C

      Tech Tips

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


    B

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

    C

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

    A

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


    1. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / DTC / P244A, P244B, P2458, P2463 and/or P24A2.

    6. 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 Click here

    A

    GO TO CLOGGING BY DPF CATALYTIC CONVERTER (GO TO STEP 8)

  5. READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE)


    1. Warm up the engine.

    2. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / DTC.

    7. Read the DTCs.


      1. When DTCs P244A, P2458 and/or P24A2 are output, clear the engine history data Click here.

      2. When DTCs P244B and/or P2463 are output, clear the PM accumulation history data Click here.

        Tech Tips

        When clearing DTC P244B and/or P2463, the DTC will be output again if the PM accumulation history data is not cleared. Therefore, make sure to clear the PM accumulation history data first.

    8. Disconnect the cable from the negative (-) battery terminal and wait for at least 1 minute.

    9. Reconnect the cable to the negative (-) battery terminal.

    10. Initialize the learning value of the injector or supply pump assembly 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).

    11. Initialize the learning value of the diesel throttle body assembly Click here.

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

    13. Turn the tester on.

    14. Enter the following menus: 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 P244A, P244B, P2458, P2463 and/or P24A2 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 center exhaust pipe assembly (catalyst converter) Click here.

      • If DTC P244A, P244B, P2458, P2463 and/or P24A2 is set, be sure to clear the DTCs.

      Result
      Engine Speed (no engine load) Differential Pressure Proceed to
      3300 to 3400 rpm (Exhaust Temperature B1S1 is 200°C (392°F) or less) 30 kPa or more A
      3300 to 3400 rpm (Exhaust Temperature B1S1 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 center exhaust pipe assembly (catalyst converter) Click here.


    NEXT

  7. READ VALUE USING INTELLIGENT TESTER (DIFFERENTIAL PRESSURE)


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

    2. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the tester on.

    6. Enter the following menus: 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 center exhaust pipe assembly (catalyst converter) may have deteriorated or the center exhaust pipe assembly (catalyst converter) may be clogged with PM.

      • If DTC P244A, P244B, P2458, P2463 and/or P24A2 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 center exhaust pipe assembly (catalyst converter) Click here.

      • If DTC P244A, P244B, P2458, P2463 and/or P24A2 is set, be sure to clear the DTCs.

      Result
      Engine Speed (no engine load) Differential Pressure Proceed to
      3300 to 3400 rpm (Exhaust Temperature B1S1 is 200°C (392°F) or less) 30 kPa or less A
      3300 to 3400 rpm (Exhaust Temperature B1S1 is 200°C (392°F) or less) 30 kPa or more B

    B

    REPLACE CENTER EXHAUST PIPE ASSEMBLY Click here

    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 menus: Powertrain / Engine and ECT / Data List / DPF Differential Pressure.

    4. Check the differential pressure when the exhaust gas temperature sensor indicates 200°C (392°F) or less.

      Result
      Engine Speed (no engine load) Differential Pressure Proceed to
      3300 to 3400 rpm (Exhaust Temperature B1S1 is 200°C (392°F) or less) 15 kPa or less A
      3300 to 3400 rpm (Exhaust Temperature B1S1 is 200°C (392°F) or less) 15 kPa or more B

    B

    REPLACE CENTER EXHAUST PIPE ASSEMBLY Click here

    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 menus: Powertrain / Engine and ECT / Data List / DPF Differential Pressure.

    4. Check the differential pressure when the exhaust gas temperature sensor indicates 200°C (392°F) or less.

      Result
      Engine Speed (no engine load) Differential Pressure Proceed to
      3300 to 3400 rpm (Exhaust Temperature B1S1 is 200°C (392°F) or less) 15 kPa or less A
      3300 to 3400 rpm (Exhaust Temperature B1S1 is 200°C (392°F) or less) 15 kPa or more B

    B

    REPLACE CENTER EXHAUST PIPE ASSEMBLY Click here

    A

    END