87121-ZY3-000 Honda MARK, RR. (BF225) (Honda Code 6993299).

Table 1
J1939 Code and Description CDL Code and Description Comments
3711-31
DPF Active Regeneration Inhibited Due to Low Exhaust Gas Temperature E593 (2)
Aftertreatment Insufficient Temperature to Complete Regeneration Active regeneration failed due to an inability of the Diesel Particulate Filter (DPF) to reach a high enough temperature. The code is logged. Engine power is derated.
Table 2
Associated Diagnostic Trouble Codes
3479-5
3479-6
3480-3
3480-4
3556-7
4077-0
4077-3
4077-4
4077-18
5425-5
5425-6
5419-3
5419-4
5419-5
5419-6
5419-7
5578-3
5578-4
5580-3
5580-4
5580-16
5580-17
5580-18 Recommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Check for Associated Codes
A. Establish communication between Cat ET and the Electronic Control Module (ECM). Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Product Status Report" from the engine ECM before performing any troubleshooting or clearing associated diagnostic trouble codes.
C. Table 2 lists the diagnostic trouble codes that are associated with the E593 (2) or 3711-31 code. Determine if any of the codes in Table 2 are present.
Associated Codes
Result: An associated code is not present.
Proceed to Test Step 2.
Result: An associated code is present.
Repair: Troubleshoot the associated code.
2. Run the "Engine Throttle Valve Test" in Cat ET
"Engine Throttle Valve Test"
Result: The test completed successfully.
Proceed to Test Step 5.
Result: The test was unsuccessful. There is an associated code present.
Repair: Troubleshoot the associated code.
Result: The test was unsuccessful. There is not an associated code present.
Proceed to Test Step 3.
3. Inspect the Engine Throttle Valve Mounting Seals
Seals
Result: The seals are in good condition.
Proceed to Test Step 4.
Result: The seals are damaged.
Repair: Replace the seals and return to Test Step 2.
4. Replace the Engine Throttle Valve
Engine Throttle Valve
Result: The engine throttle valve was replaced.
Return to Test Step 2.
5. Perform a "Manual DPF Regeneration"
Note: This test must be performed through Cat ET. The Cat ET service tool enhances the diagnostics during the service test.
A. Clear all codes.
B. Start the engine. Allow the engine to idle for 3 minutes.
C. Start a "Manual DPF Regeneration" in Cat ET.
Manual DPF Regeneration
Result: The "Manual DPF Regeneration" completed successfully. There are no additional codes.
Return the unit to service.
Result: The "Manual DPF Regeneration" did not complete successfully.
Repair: Check the list of active diagnostic codes. Troubleshoot the code that applies to the failed regeneration. Refer to Table 2 for associated codes.
Result: The "Manual DPF Regeneration" did not complete successfully and there are no associated codes.
Proceed to Test Step 6.
6. Replace the DOC
A. Replace the DOC.
DOC
Result: The DOC was replaced.
Proceed to Test Step 7.
7. Perform a "Manual DPF Regeneration"
Note: This test must be performed through Cat ET. The Cat ET service tool enhances the diagnostics during the service test.
A. Clear all codes.
B. Start the engine. Allow the engine to idle for 3 minutes.
Note: Do not use the operators switch for a stationary regeneration. The service tests provide enhanced diagnostics that are necessary for proper troubleshooting and repair.
C. Start a "Manual DPF Regeneration" in Cat ET.
Manual DPF Regeneration
Result: The "Manual DPF Regeneration" completed successfully. There are no additional codes.
Return the unit to service.
Result: The "Manual DPF Regeneration" did not complete successfully.
There are more codes.
Repair: Troubleshoot the additional codes before returning the unit to service. Refer to Troubleshooting for the correct procedure.
Verify that the problem is resolved.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).