i08134320
DEF Tank Temperature Is Low
Table 53
Diagnostic Trouble Code for DEF Tank Temperature Is Low
J1939 Code PDL code
Code Description
(code descriptions may vary)
Comments
3031-7
E1441 (2)
Aftertreatment #1 DEF Tank Temperature :
Not Responding Properly
The temperature of the Diesel Exhaust Fluid (DEF) is
not responding as expected during the defrosting
period.
The code is logged.
The engine is derated.
3031-18
E1398 (2)
Catalyst Tank Temperature : Low - moderate
severity (2)
The temperature of the Diesel Exhaust Fluid (DEF) in
the DEF tank is below the parameter programmed in
the ECM after a heat cycle.
The code is logged.
The engine is derated.
Follow the troubleshooting procedure to identify the root cause of the problem.
Complete the procedure in the order in which the
steps are listed.
Table 54
Troubleshooting Test Steps
Values Results
1. Check for Associated Diagnostic Trouble Codes
A. Use the electronic service tool to confirm if a diagnostic code is
present.
Diagnostic Trou-
ble Codes
Result: A diagnostic code other than those codes listed
in Table 53 is active.
Repair: Troubleshoot the associated code. Refer to Trou-
bleshooting, “Diagnostic Trouble Codes”.
Result: One of the diagnostic codes listed in Table 53 is
active.
Proceed to Test Step 2.
2. Check the Coolant Level of the Engine
A. Determine if the engine coolant level is full.
Coolant Level Result: The coolant level is full.
Proceed to Test Step 3.
Result: The coolant level is not full.
Repair: Add coolant to the system.
Determine the cause of low coolant. Refer to Trouble-
shooting, “Low Coolant Level” for additional information.
If adding coolant does not correct the fault, proceed to
Test Step 3.
(continued)
118 UENR4469-36
Symptom Troubleshooting
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