Dtc P244C Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1

DESCRIPTION

MONITOR DESCRIPTION

INSPECTION PROCEDURE

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

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P244C, P244E, P2458 AND P2463)

GO TO DTC CHART

CHECK FOR BLACK SMOKE

REPLACE EXHAUST PIPE ASSEMBLIES (DPF CATALYTIC CONVERTERS)

CHECK FOR WHITE SMOKE (DURING PM FORCED REGENERATION)

REPLACE EXHAUST FUEL ADDITION INJECTOR ASSEMBLY

REPLACE EXHAUST PIPE ASSEMBLIES (DPF CATALYTIC CONVERTERS)

CHECK FUEL INJECTION SYSTEM

CHECK INTAKE / EXHAUST SYSTEM

CHECK AFTER TREATMENT CONTROL SYSTEM

REPAIR OR REPLACE MALFUNCTIONING PARTS

CATALYST RECORD CLEAR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DESCRIPTION

HINT:

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

MONITOR DESCRIPTION

1. Excessive PM accumulation:
   The ECM monitors the PM Accumulation Ratio and when the accumulated PM volume in the DPF catalyst converter exceeds the limit, the ECM illuminates the MIL.
   

1. Abnormal catalyst temperature increase:
   The ECM monitors exhaust gas temperature increase while the exhaust fuel addition injector assemblies adds fuel during PM forced regeneration. Exhaust gas temperature increases up to approximately 300 to 500°C (572 to 932°F) during PM forced regeneration. If the temperature does not increase even after a certain amount of time has elapsed, the ECM determines that the DPF catalyst converter is abnormal and illuminates the MIL.
   

1. Diesel particulate filter regeneration duration:
   When PM forced regeneration is manually performed and PM forced generation does not finish even after 60 minutes or more elapse, the ECM determines that there is problem with the DPF catalyst converter and illuminates the MIL.
   
   
   
   
   

INSPECTION PROCEDURE

NOTICE:

1. After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
   
2. After replacing the fuel supply pump assembly, the ECM needs initialization (Click here).
   
3. After replacing an injector assembly, the ECM needs registration (Click here).
   

HINT:

1. If DTC P244B, P244C, P244E, P2458, P2463 or P2465 is stored, the fail-safe controls the engine power output and PM forced regeneration is prohibited. In this case, PM forced regeneration can be performed after disconnecting the EFI MAIN fuse or battery terminal and waiting for 60 seconds or more before connecting it again.
   
2. 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.
   

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. Record the stored DTC and freeze frame data.
   

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

   HINT:

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

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
   P244C, P244E, P2458 or P2463 is output	A
   P244B or P2465 is output at the same time as P2463*	B
   Only P2463 is output	C
   Other relevant DTCs are output	D

   HINT:

   1. *: When P244B or P2465 is output at the same time as P2463, perform troubleshooting for P244B or P2465.
      
   2. When DTC P1603, P1604 or P1608 is output in addition to P244C or P244E, perform troubleshooting for P1603, P1604 or P1608 first.
      

1. Diagnose relevant DTCs (Click here).
   

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.
   

   HINT:

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

1. Even though it has been determined that the exhaust pipe assemblies (DPF catalyst converters) need to be replaced, make sure to perform all diagnostic procedures for P244C, P244E, P2458 and P2463 before replacing them.
   

   HINT:

   These DTCs are 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.

1. Clear the DTC and Exhaust Fuel Addition FB and Exhaust Fuel Addition FB #2 value by disconnecting the cable from the negative (-) battery terminal or removing the EFI MAIN fuse for 1 minute or more.
   

   HINT:

   1. The accumulated PM volume stored in the ECM cannot be initialized using the GTS.
      
   2. 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. Clear the DTCs (Click here).
   

5. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
   

6. Perform PM forced regeneration (Click here).
   

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

   Result

   Result	Proceed to
   During PM forced regeneration, temperature of Exhaust Temperature B1S3 and Exhaust Temperature B2S3 is 300 to 500°C and no white smoke is generated	A
   During PM forced regeneration, temperature of Exhaust Temperature B1S3 and Exhaust Temperature B2S3 is 300 to 500°C and abnormal white smoke is generated*1	B
   Except above*2	C

   HINT:

   1. *1: If abnormal white smoke is only generated during PM forced regeneration, there may be uncombusted fuel due to deterioration of the DPF catalyst converter.
      
   2. *1: When there is a malfunction with combustion control, operation performance may be reduced and abnormalities may be felt even if PM forced regeneration is performed.
      
   3. *2: An excess of accumulated PM is the result of a malfunction in the control system causing poor combustion and an increase in black smoke.
      

1. Even though it has been determined that the exhaust fuel addition injector assemblies need to be replaced, make sure to perform all diagnostic procedures for P244C, P244E, P2458 and P2463 before replacing them.
   

   HINT:

   These DTCs are 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.

1. Even though it has been determined that the exhaust pipe assemblies (DPF catalyst converters) need to be replaced, make sure to perform all diagnostic procedures for P244C, P244E, P2458 and P2463 before replacing them.
   

   HINT:

   These DTCs are 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.

1. Check the fuel injection system (Click here).
   

1. Check the Intake/exhaust system (Click here).
   

1. Check the after treatment control system (Click here).
   

1. Determine the parts to replace according to the output DTCs.
   
   

   Result

   Result	Items to be Replaced
   P244C is output	Monolithic converter assembly RH (for bank 1 CCo catalytic converter) Front exhaust pipe assembly (for bank 1 DPF catalytic converter) Front No. 2 exhaust pipe assembly (for bank 2 DPF catalytic converter) Exhaust fuel addition injector assembly (for bank 1)
   P244E is output	Monolithic converter assembly LH (for bank 2 CCo catalytic converter) Front exhaust pipe assembly (for bank 1 DPF catalytic converter) Front No. 2 exhaust pipe assembly (for bank 2 DPF catalytic converter) Exhaust fuel addition injector assembly (for bank 2)
   P2458 is output	Monolithic converter assembly RH (for bank 1 CCo catalytic converter) Monolithic converter assembly LH (for bank 2 CCo catalytic converter) Front exhaust pipe assembly (for bank 1 DPF catalytic converter) Front No. 2 exhaust pipe assembly (for bank 2 DPF catalytic converter) Exhaust fuel addition injector assembly (for bank 1) Exhaust fuel addition injector assembly (for bank 2)
   P2463* is output	Monolithic converter assembly RH (for bank 1 CCo catalytic converter) Monolithic converter assembly LH (for bank 2 CCo catalytic converter) Front exhaust pipe assembly (for bank 1 DPF catalytic converter) Front No. 2 exhaust pipe assembly (for bank 2 DPF catalytic converter) Exhaust fuel addition injector assembly (for bank 1) Exhaust fuel addition injector assembly (for bank 2)

HINT:

1. Replace the following items only when it has been determined necessary based on diagnosis for P244C, P244E, P2458 and P2463.
   
2. Replace the DPF catalytic converter for bank 1 and bank 2 at the same time.
   
3. *: During the after treatment control system inspection performed when DTC P2463 is output, if Catalyst Differential Press and Catalyst Differential Press #2 decrease to 0.45 or less after forced regeneration is performed and there are no melted or clogged areas found when visually inspecting the CCo catalytic converter and DPF catalytic converter, then do not perform catalytic converter replacement.
   

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

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

4. Replace the Monolithic converter assembly RH (for bank 1 CCo catalytic converter) (Click here).
   

5. Replace the Monolithic converter assembly LH (for bank 2 CCo catalytic converter) (Click here).
   

6. Replace the exhaust fuel addition injector assembly (for bank 1) (Click here).
   

7. Replace the exhaust fuel addition injector assembly (for bank 2) (Click here).
   

8. Repair or replace the malfunctioning part confirmed in the diagnosis of the fuel injection system, Intake/exhaust system and after treatment control system.
   

1. Perform the catalyst record clear (Click here).
   

   HINT:

   1. If the DPF catalytic converter or CCo catalytic converter is replaced, perform "catalyst record clear".
      
   2. If the DPF catalytic converter and CCo catalytic converter were not replaced, proceed to the next step.
      

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

5. Perform PM forced regeneration (Click here).