TSB220043

3/18/22, 4:00 PM
New Diesel Exhaust Fluid (DEF) Controller Causing Line Heater Fault Codes: 3258, 3261, and 3425
Technical Service Bulletin
Technical Service Bulletin: TSB220043
Released Date: 07-Mar-2022
New Diesel Exhaust Fluid (DEF) Controller Causing Line Heater Fault Codes: 3258,
3261, and 3425
New Diesel Exhaust Fluid (DEF) Controller Causing
Line Heater Fault Codes: 3258, 3261, and 3425
Warranty Statement
The information in this document has no effect on present warranty coverage or repair practices,
nor does it authorize TRP or Campaign actions.
Contents
Product Affected
ISB6.7 CM2250
ISC8.3 CM2250
ISL9 CM2250
ISX12/ISX11.9 CM2250
ISX15 CM2250
Issue Summary An issue with the aftertreatment diesel exhaust fluid (DEF) controller is causing
line heater fault codes to come active after installation in cold climates. Symptom:
Line heater fault codes: FC3258, FC3261, and FC3425, are active after the installation of a
new DEF controller.
Root Cause:
Fault codes are caused by a DEF controller issue.
Verification
DEF controller compatibility issue causes the DEF controller to fail the internal line heater
diagnostic test and triggers line heater fault codes when the line heater circuit is activated.
This issue affects DEF controllers, Part Numbers 5283311 and 5283311RX, built between 5
May 2021 and 15 December 2021.
Part Identification
The build date code printed on the DEF controller is in YY-MM-DD format.
Example Date: 21-06-11 is 11 June 2021. See Figure 1.
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3/18/22, 4:00 PM
New Diesel Exhaust Fluid (DEF) Controller Causing Line Heater Fault Codes: 3258, 3261, and 3425
Figure 1, Example Date on DEF Controller Label.
Resolution
DEF controllers built outside of the affected time period must be utilized.
Work is in-process to release a fix for the affected DEF controllers built between 5 May 2021
and 15 December 2021, but timing for this fix has not been finalized.
Document History
Date
2022-3-4
Details
Module Created
Last Modified: 07-Mar-2022
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