DTC P2458 Diesel Particulate Defuser (DPD) Regeneration Duration (4JJ3 with DPD)

Note

Under driving conditions in which the exhaust gas temperature is not stable during the DPD regeneration process (e.g. frequent stops and starts), this DTC is set.
If there is a problem with the fuel system such as fuel injector damage, this DTC is set.
If the oxidation catalyst is deteriorated or damaged, this DTC is set.
If regeneration time is longer than normal, refer to DPD system regeneration long time in the Description Engine Symptom, and inspect.

Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) DPD system regeneration long time".

1. Engine control system check

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) Diagnostic system check-engine controls".

2. Prioritized DTC check

1) Connect the scan tool.

2) Turn OFF the ignition switch for 1 minute or more.

3) Start the engine.

4) Observe the DTC information with a scan tool. Is DTC P0426, P0427, P0428, P042B, P042C, or P042D set at the same time?

Yes

Go to the applicable DTC diagnosis.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0426 Exhaust Gas Temperature (EGT) Sensor 1 Circuit Range/Performance".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0427 Exhaust Gas Temperature (EGT) Sensor 1 Circuit Low".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0428 Exhaust Gas Temperature (EGT) Sensor 1 Circuit High".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P042B Exhaust Gas Temperature (EGT) Sensor 2 Circuit Range/Performance".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P042C Exhaust Gas Temperature (EGT) Sensor 2 Circuit Low".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P042D Exhaust Gas Temperature (EGT) Sensor 2 Circuit High".

=>Go to DPD components inspection.

3. DPD components inspection

1) Inspect the exhaust differential pressure sensor for the following. Is the result normal?

Clogging, collapsing, or twisting of the differential pressure hose or pipe
Exhaust differential pressure sensor damage
Dirt or foreign material blocking the inlet of the exhaust differential pressure sensor
Misdetection or delayed response of the exhaust differential pressure sensor

Note

The installation direction of the differential pressure hose is predetermined.

2) Inspect the exhaust system for the following conditions. Is the result normal?

Missing or damaged exhaust pipe gasket
Exhaust gas leakage from the exhaust pipe, gasket, DPD body, exhaust gas temperature sensor, or differential pressure hose or pipe
Exhaust system modification

3) Are all of the results normal?

Yes

=>Go to DPD status verification.

Repair or replace as necessary.

Note

If the exhaust differential pressure sensor is replaced, learning must be performed.

Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) exhaust differential pressure sensor installation".

=>Go to DPD Forced Regeneration.

4. DPD status verification

1) Observe the DPD PM Storage Status parameter and the DPD Distance Status parameter on the scan tool. Does it apply to the C or D area in the DPD status table?

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DPD control system check".

Yes

=>Go to DPD Forced Slow Regeneration.

=>Go to DPD Forced Regeneration.

5. DPD Forced Slow Regeneration

1) Turn ON the ignition switch.

2) If a DTC is set, clear the DTC with a scan tool.

3) Turn OFF the ignition switch for 1 minute or more.

4) Perform the DPD Slow Regeneration with a scan tool.

Caution

To prevent heat from accumulating in the underfloor, perform work in a well-ventilated area or use an electric fan, etc., to blow air into the underfloor.
Open the engine hood to allow heat to leave the engine room.
After completing DPD Slow Regeneration, do not turn OFF the engine immediately. Idle the engine for at least 15 minutes and then turn OFF the engine.
After completing the DPD Slow Regeneration, do not continue to perform regeneration. Wait at least 30 minutes.
After completing the DPD Slow Regeneration, be sure to replace the engine oil.

Procedure completion

=>Go to DPD exhaust differential pressure check.

6. DPD Forced Regeneration

1) Perform the clearing of the DTC and DPD Regeneration Data Reset with a scan tool.

Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD installation".

2) Turn OFF the ignition switch for 1 minute or more.

3) Perform DPD Forced Regeneration with a scan tool.

Procedure completion

=>Go to DPD exhaust differential pressure check.

7. DPD exhaust differential pressure check

1) Perform Exhaust Differential Pressure Sensor Learning.

Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD installation".

2) Observe the Exhaust Gas Temperature 1 parameter on the scan tool.

Value: 170 ℃ { 338 °F }

3) If the reading is more than the specified value, run the engine at 1,500 rpm with no load until the temperature is lowered to reach the specified value.

4) Observe the Exhaust Differential Pressure parameter when the Exhaust Gas Temperature 1 parameter reaches the specified value with the accelerator pedal fully depressed. Is the Exhaust differential pressure parameter less than or equal to the specified value?

Value: 190 ℃ { 374 °F } Exhaust Gas Temperature 1

Value: 16.0 kPa { 2.3 psi } Exhaust Differential Pressure

Yes

Observe the DTC information with a scan tool.

Replace the DPD.

Note

If a DTC is set, clear the DTC with a scan tool.

Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD removal".

Refer to "1.Engine 1G.Exhaust(4JJ3 with DPD) DPD installation".