CORE ASSEM. 2W8784 - Caterpillar

Table 1
Diagnostic Trouble Codes for DEF Control Module Temperature Is High
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
5480-16 E1430 (2) Aftertreatment 1 Diesel Exhaust Fluid Controller Temperature : High - moderate severity (2) The temperature of the Dosing Control Unit (DCU) has exceeded the trip point of 116° C (240° F).
Illustration 1 g03760956
(1) Dosing Control Unit (DCU) Complete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps Values Results
1. Determine the Source of the High Temperature
A. Evaluate the installation location of the DCU.
B. Check for heat sources close to the DCU.
Heat Source
Result: The DCU is located close to a heat source.
Repair: Eliminate the heat source by installing a heat shield or moving the component creating the heat.
Proceed to Test Step 2.
2. Replace the DCU
A. Replace the DCU.
DCU
Result: The DCU was replaced.
Verify that the problem is resolved.
If the fault is still present, contact the Dealer Solutions Network (DSN).