BALLSTUD 3385050 - Caterpillar

Use this procedure to troubleshoot the following codes:
Table 1
J1939 Code and Description CDL Code and Description Comments
6322-31
Aftertreatment #1 SCR Desulfation Too Frequent E1465 (1)
Aftertreatment #1 SCR Desulfation Too Frequent This code indicates that the engine is regenerating more frequently due to SCR problems. Note: This code can log as a result of using fuel that does not meet the Ultra Low Sulfur Diesel requirements. An issue with urea deposits in the exhaust mixer or a failed injector can also cause this code to log.
Table 2
Required Service Tools
Part Number Description
441-0451 Kit - Test
Table 3
Troubleshooting Test Steps Values Results
1. Check the Diesel Exhaust Fluid (DEF) quality.
A. Measure the DEF quality. Refer to Testing and Adjusting, "Diesel Exhaust Fluid Quality - Test" for the correct procedure.
DEF
Result : The DEF is not contaminated and the concentration is not within the acceptable range.
Repair : Drain the DEF from the tank. Refill the tank with DEF that meets ISO 22241 quality standards.
Proceed to Test Step 2.
Result : The DEF is not contaminated and the concentration is within the acceptable range.
Proceed to Test Step 2.
Result : The DEF is contaminated.
Repair : Contact the Dealer Solutions Network (DSN) for further information.
2. Perform a "DEF Dosing System Accuracy Test".
A. Perform a "DEF Dosing System Accuracy Test". Refer to Testing and Adjusting, "Aftertreatment SCR System Dosing Test" for the correct procedure.
DEF Dosing System Accuracy Test
Result: The quantity collected is within specifications.
Repair: Install the DEF injector.
Proceed to Test Step 4.
Result: The quantity collected is below specifications.
Proceed to Test Step 3.
Result: The quantity collected is above specifications. A failed DEF injector has been detected.
Repair: Replace the DEF injector.
Proceed to Test Step 6.
3. Check the DEF pressure line.
A. Turn the keyswitch to OFF for 2 minutes.
Note: The keyswitch must be OFF for 2 minutes to allow the DEF pump to purge, reset the code, and reset the ECM.
B. Visually inspect the lines for leaks or damage.
C. Remove the DEF pressure line between the DEF pump and the DEF injector.
D. Check for ice, urea deposits, or debris in the DEF pressure line.
DEF Pressure Line
Result : There are restrictions or leaks in the lines.
Repair : Remove the restrictions or replace the pressure line.
Proceed to Test Step 6.
Result : There are no restrictions or leaks in the lines. Proceed to Troubleshooting, "DEF Pressure is Low".
4. Inspect the exhaust mixer for DEF deposits.
A. Turn the keyswitch to OFF.
B. Remove the DPF outlet. Refer to the Disassembly and Assembly, Diesel Particulate Filter - Remove and Install manual for the proper procedure.
C. Inspect the exhaust mixer for DEF deposits.
Exhaust Mixer
Result : There were no DEF deposits on the exhaust mixer.
Proceed to Test Step 5.
Result : There were DEF deposits on the exhaust mixer. The exhaust mixer is damaged.
Repair : Replace the exhaust mixer.
Proceed to Test Step 6.
5. Determine the quality of the fuel.
A. Take a fuel sample from the fuel tank. Refer to Testing and Adjusting, "Fuel Quality - Test".
Fuel Quality
Result : The fuel being used does not meet the specifications for the engine.
Repair : Contact