ECD SYSTEM(w/ DPF), Diagnostic DTC:P0420, P2458, P2463

DTC Code DTC Name
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
P2458 Diesel Particulate Filter Regeneration Duration
P2463 Diesel Particulate Filter Restriction - Soot Accumulation

DESCRIPTION

DPF (Diesel Particulate Filter) is an emission control system which processes the particulate matter (PM) that is emitted from a diesel engine. The DPF catalyst has a porous ceramic structure which has a PM collecting function. The PM that is collected is continuously treated by oxidation due to catalytic action at high temperatures, however PM accumulation increases at low atalyst temperatures because the oxidation process slows down. The ECM performs PM forced regeneration so that the amount of accumulated PM does not exceed the threshold.

B0024OFE01
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0420 Catalyst System Efficiency Below Threshold (Bank 1)

During PM forced regeneration, DOC catalyst temperature does not increase sufficiently for 3 minutes.

(2 trip detection logic)

  • Exhaust manifold converter sub-assembly

  • Exhaust fuel addition injector assembly

Common Inspection Item:


  • Fuel injection system

  • Intake/Exhaust system

  • After treatment control system

 Comes on DTC stored
P2458 Diesel Particulate Filter Regeneration Duration

When PM forced regeneration is manuallyperformed, PM forced regeneration does notfinish even after 60 minutes or more elapse.

(1 trip detection logic)

  • Exhaust manifold converter sub-assembly

  • Exhaust fuel addition injector assembly

Common Inspection Item:


  • Fuel injection system

  • Intake/Exhaust system

  • After treatment control system

 Comes on DTC stored
P2463 Diesel Particulate Filter Restriction - Soot Accumulation

While driving, PM accumulation amount exceeds the limit.

(1 trip detection logic)

  • Exhaust Manifold Converter sub-assembly

  • Exhaust fuel addition injector assembly

Common Inspection Item:


  • Fuel injection system

  • Intake/Exhaust system

  • After treatment control system

 Comes on DTC stored

Tech Tips

PM forced regeneration may be prohibited due to a fail-safe operation that is performed when another DTC is stored (including engine output limitation).

Related Data List
DTC No. Data List
P0420

  • Exhaust Fuel Addition FB

  • Catalyst Differential Press
P2458
P2463

MONITOR DESCRIPTION

The ECM monitors the differential pressure between the upstream and downstream of the DPF catalyst and also monitors exhaust gas temperature to detect a malfunction in the exhaust manifold converter subassembly.




CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P0420 PM forced regeneration
P2458
P2463

CAUTION / NOTICE / HINT

Note


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

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

    Click here

Tech Tips


  • If DTC P0420, P2458 or P2463 is stored, fail-safe controls engine power output and PM forced regeneration is prohibited. In this case, PM forced regeneration can be performed after disconnecting the EFI-MAIN NO. 1 fuse or battery terminal and waiting for 60 seconds or more before connecting it again.

  • 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 DTC OUTPUT (RECORD STORED DTC AND FREEZE FRAME DATA)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Record the stored DTC and freeze frame data.


      Powertrain > Engine > Trouble Codes

    6. Check Exhaust Fuel Addition FB and Catalyst Differential Press in the freeze frame data.

      Tech Tips


      • When the Exhaust Fuel Addition FB value is 1.45 or more, it indicates a high possibility of insufficient temperature increase during PM regeneration control.

      • When the Catalyst Differential Press value is more than 0.47, it indicates a high possibility that DPF catalyst is clogged.

      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P244C AND P2463)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P0420, P2458 or P2463 is output A
      DTC P244B is output at the same time as P2463* B
      Other relevant DTCs are output C

      Tech Tips


      • *: When P244B is output at the same time as P2463, perform troubleshooting for P244B.

      • When DTC P1603, P1604 or P1608 is output in addition to P0420, perform troubleshooting for P1603, P1604 or P1608 first.


    B

    GO TO DTC P244B Click here

    A

    GO TO STEP 4 Click here

    C

  3. GO TO DTC CHART


    1. Diagnose relevant DTCs.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. 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 procedure [A] 10 times [B].

    5. Check for black smoke emission during the 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.

      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR WHITE SMOKE (DURING PM FORCED REGENERATION) Click here

    NG

  5. REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY


    1. Even though it has been determined that the exhaust manifold converter sub-assembly (DPF catalyst) needs to be replaced, make sure to perform all diagnostic procedures for P0420, P2458 and P2463 before replacing it.

      Tech Tips

      This DTC is stored because an excessive amount of PM has accumulated and resulted in abnormal combustion. It is necessary to diagnose the cause of abnormal PM accumulation and repair the problem. Therefore, do not perform replacement at this time.

      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK FOR WHITE SMOKE (DURING PM FORCED REGENERATION)


    1. Clear the DTC and Exhaust Fuel Addition FB value by disconnecting the cable from the negative (-) battery terminal or removing the EFI-MAIN NO. 1 fuse for 1 minute or more.

      Tech Tips


      • The accumulated PM volume stored in the ECM cannot be initialized using the GTS.

      • To perform PM forced regeneration, it is necessary to perform initialization of the accumulated PM volume stored in the ECM.

    2. Connect the GTS to the DLC3.

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

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    6. Start the engine and warm it up until the engine coolanttemperature reaches 75°C (167°F) or higher.

    7. Maintain the maximum possible engine speed under no load for 10 seconds to blow out all soot from inside the exhaust pipe.

      Tech Tips


      • If only a low engine speed is continuously maintained, soot may accumulate at the end of the catalyst.

      • When soot accumulates at the end of the catalyst, it may not be possible to perform PM forced regeneration control normally.

    8. Perform PM forced regeneration.

      Click here

    9. Check if the temperature increases or abnormal white smoke occurs during PM forced regeneration.

      Result
      Result Proceed to
      No abnormal white smoke occurs but the temperature of exhaust gas temperature sensor B1S3 does not reach 450°C (842°F) or higher during PM forced regeneration A
      Abnormal white smoke occurs and the temperature of exhaust gas temperature sensor B1S3 reaches 300°C (572°F) or higher during PM forced regeneration B
      Except above* C

      Tech Tips


      • When excessive white smoke occurs only during PM forced regeneration, uncombusted fuel passes through due to the deterioration of DPF catalyst is suspected.

      • When combustion control has a malfunction, deterioration or abnormality of driving performance can be felt despite PM forced regeneration.

      • If Exhaust Temperature B1S3 does not reach 450°C (842°F) or higher, the exhaust fuel addition injector assembly may be clogged.

      • *: Excessive accumulation of PM is caused by a worsening in combustion conditions and an increase in black smoke due to a malfunction in the control system.


    B

    REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY Click here

    C

    CHECK FUEL INJECTION SYSTEM Click here

    A

  7. REPLACE EXHAUST FUEL ADDITION INJECTOR ASSEMBLY


    1. Even though it has been determined that the exhaust fuel addition injector assembly needs to be replaced, make sure to perform all diagnostic procedures for P0420, P2458 and P2463 before replacing it.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 9 Click here

  8. REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY


    1. Even though it has been determined that the exhaust manifold converter sub-assembly (DPF catalyst) needs to be replaced, make sure to perform all diagnostic procedures for P0420, P2458 and P2463 before replacing it.

      Tech Tips

      This DTC is stored because an excessive amount of PM has accumulated and resulted in abnormal combustion. It is necessary to diagnose the cause of abnormal PM accumulation and repair the problem. Therefore, do not perform replacement at this time.

      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK FUEL INJECTION SYSTEM


    1. Check the fuel injection system.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  10. CHECK INTAKE / EXHAUST SYSTEM


    1. Check the intake/exhaust system.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  11. REPAIR OR REPLACE MALFUNCTIONING PARTS

    Tech Tips

    Replace the following items only when it has been determined necessary based on diagnosis for DTC P0420, P2458 and P2463.


    1. Replace the exhaust manifold converter sub-assembly (DPF catalyst).

      Click here

      Note

      Perform Initialization procedure for "DPF catalyst record clear" and "DPF Deterioration Record Clear"

      Click here

    2. Replace the exhaust fuel addition injector assembly.

      Click here

    3. Repair or replace the malfunctioning part confirmed in the diagnosis of the fuel injection system and intake/exhaust system.

      Result
      Proceed to
      NEXT

    NEXT

  12. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    4. Warm up the engine (engine coolant temperature is 75°C (167°F) or higher).

    5. Perform PM forced regeneration.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END