Express 2500 V8-6.6L DSL Turbo (2010)
Warning
To avoid extremely elevated exhaust temperatures, inspect and remove any debris or mud build up at the exhaust cooler located at the tailpipe.
Caution: Due to the elevated engine temperatures created while performing this procedure it is imperative to keep the front of vehicle in an open
environment, with the hood open, away from any walls or buildings. This will ensure proper airflow across the radiator.
Note:
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If you were not referred to this procedure from another diagnostic, DO NOT perform the Service Regeneration.
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Do not refuel the vehicle during DPF Service Regeneration.
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The scan tool must remain connected to the data communication link (DCL) during the entire service regeneration procedure.
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Do not perform the DPF Service Regeneration if the diesel exhaust fluid temperature (DEF) is less than 0°C (32°F).
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Fuel level should be greater 15 percent to ensure a successful regeneration.
1. Ignition ON, observe the DTC information with a scan tool. Verify there are no DTCs set, except DTC P2463.
‹› If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for further diagnosis.
2. Park the vehicle outside the repair facility and away from any obstacles.
3. Open the hood.
4. Place the transmission in Park and apply the parking brake.
5. Clear the DTCs with a scan tool before commanding a DPF Service Regeneration.
6. Observe the scan tool DPF Regenerations Completed parameter and record the value.
7. Check the following fluid levels before and after this procedure:
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Engine oil
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Engine coolant
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Power steering
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Transmission
8. Select the DPF Service Regeneration in the Output Controls menu and follow the instruction on the scan tool.
9. Command the DPF Service Regeneration ON with a scan tool.
‹› If the service regeneration failed to start, observe the DPF Regen Inhibit Reason parameter on the scan tool to identify the Regen Inhibit
Reason. Refer to the Service Regeneration Unsuccessful table in Diagnostic Aids.
10. When the service regeneration is complete, the DPF Regeneration Status parameter will display Complete and the DPF Regenerations Completed
parameter will have incremented by 1 from the value recorded in step 5.
‹› If the service regeneration did not complete, was aborted, or the Regeneration Completed did not increment, refer to the service regeneration
unsuccessful table in Diagnostic Aids.
Note: DTC P202E may set after a DPF Service Regeneration. The excessive exhaust temperatures created during a DPF Service Regeneration
causes the diesel exhaust fluid (DEF) to crystallize. The crystalize DEF will cause the Q61 emission reduction fluid injector to stick. Idling the
engine for 10 minutes will cause the DEF to liquefy and un-stick the injector.
11. Allow the engine to cool by idling for an additional 10 minutes. Command the Reductant Injector ON and OFF several times with a scan tool.
12. Clear the DTCs with a scan tool.
13. Ignition OFF for 90 seconds.
14. Engine running, perform the following within 10 minutes of a successful service regeneration. Operate the vehicle within the following Conditions
for Running DTC P2002. Refer to DTC P2002 (See: Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and
Associated Procedures/P Code Charts/P2002).
‹› If DTC P2002 or P244B sets, replace the Exhaust Particulate Filter.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and
Associated Procedures/Verification Tests and Procedures) after completing the repair.
Exhaust Particulate Filter Replacement (LMM) (See: Continuous Trap Oxidizer/Service and Repair) Exhaust Particulate Filter Replacement (20 Series)
(See: Continuous Trap Oxidizer/Service and Repair) Exhaust Particulate Filter Replacement (35 Series) (See: Continuous Trap Oxidizer/Service and
Repair)
