RADIATOR & HYD OIL COOLER GP 2583459 - Caterpillar

Table 1
J1939 Code and Description CDL Code and Description Comments
4364-1
Aftertreatment #1 SCR Catalyst Conversion Efficiency : Low - most severe (3) E1309 (3)
Low Aftertreatment #1 SCR Catalyst Conversion Efficiency The NOx conversion across the Selective Catalyst Reduction (SCR) catalyst is lower than expected.
4364-17
Aftertreatment #1 SCR Catalyst Conversion Efficiency : Low - least severe (1) E1309 (1)
Low Aftertreatment #1 SCR Catalyst Conversion Efficiency The NOx conversion across the SCR catalyst is lower than expected.
4364-18
Aftertreatment #1 SCR Catalyst Conversion Efficiency : Low - moderate severity (2) E1309 (2)
Low Aftertreatment #1 SCR Catalyst Conversion Efficiency The NOx conversion across the SCR catalyst is lower than expected. Probable Causes
Codes
DEF quality
Check software
DEF pump
DEF pressure line
Urea
SensorsRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: A code is active or logged.
Proceed to Test Step 2
2. Check the DEF Quality
A. Using a 431-7087 Tool Gp, measure the Diesel Exhaust Fluid (DEF) quality.
Refer to Testing and Adjusting, "Diesel Exhaust Fluid Quality - Test" for the correct procedure.
25% to 42% DEF Concentration
Result: The DEF quality is NOT within the acceptable range.
Drain the DEF fluid from the tank. Refill the tank with DEF that meets ISO 22241 quality standards.
Proceed to Test Step 3.
Result: The DEF quality is within the acceptable range.
If the problem is not resolved, proceed to Test Step 3.
3. Check the Software Part Number
A. Turn the DC