TSB170063-051220

Fault Codes 3545 and 1887 Caused by Water or Soap Contaminants in Exhaust System
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Technical Service Bulletin
Technical Service Bulletin:
Released Date: 16-Aug-2017
TSB170063
Fault Codes 3545 and 1887 Caused by Water or Soap Contaminants in
Exhaust System
Fault Codes 3545 and 1887 Caused by Water
or Soap Contaminants in Exhaust System
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
• All 2010 and later products equipped with aftertreatment NOx sensors.
Issue
Symptom:
• Fault Code 3545 and 1887
Root Cause
• Water and soap are entering the exhaust system when vehicles are washed,
contaminating the aftertreatment NOx sensor element or cracking the hot ceramic
element.
Resolution
• Extra care should be taken to prevent any water or soap from entering the exhaust
system.
◦ Water can act as a transport agent to redeposit foreign contaminants such as
road salt or corrosion onto aftertreatment NOx sensor element.
https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2017/tsb170063.html
8/23/2017
Fault Codes 3545 and 1887 Caused by Water or Soap Contaminants in Exhaust System
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◦ Soaps and power washing fluid contain chemicals known to contaminate
aftertreatment NOx sensor element, possibly leading to aftertreatment NOx
sensor malfunction.
• Inspect aftertreatment SCR drain hole for any blockage. See corresponding Service
Manual. Reference Procedure 011-036 in Section 11.
Document History
Date
2017-5-12
Details
Module Created
Last Modified: 16-Aug-2017
https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2017/tsb170063.html
8/23/2017