Table 61
Diagnostic Trouble Codes for Excessive Soot Load
J1939 Code
PDL Code Code Description
(code descriptions may vary)
Comments
3719-16 E995 (2) High Diesel Particulate Filter #1
Soot Loading - Level 2
The estimated soot load is above 116 percent.
Engine power is gradually derated as the soot load
increases.
The emissions system failure lamp will flash.
3719-0 E995 (3) High Diesel Particulate Filter #1
Soot Loading - Level 3
The estimated soot load is above 127 percent.
Engine power is derated 100 percent.
The emissions system failure lamp will flash and a warning
horn will sound.
7440-31
E1645 (1)
Aftertreatment Active Regeneration
Inhibited Due to Low Exhaust
Pressure
The exhaust gas pressure is too low to support DPF regen-
eration (if equipped).
The Electronic Control Module (ECM) uses the soot
sensors to monitor the soot load in the Diesel
Particulate Filter (DPF). An excessive accumulation
of soot in the DPF can be caused by the following
faults:
• Faulty soot sensor system
• Oil in the exhaust system
• Faulty injectors
• A mechanical fault in a cylinder
• Low exhaust gas pressure
• A faulty exhaust back pressure regulator
• A fault in the NOx Reduction System (NRS)
• Fuel with a high sulfur content
Table 62
Required Tools
Tool Part Number
Part Description Qty
A T40-0025 Attenuator 1
Engine operation must be kept to a minimum to
minimize the amount of soot that is created. Follow
the troubleshooting procedure to minimize the
amount of engine operation.
126 UENR4469-36
Symptom Troubleshooting
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