SS1034491
Service Bulletin Details
Public Details for: SS1034491
Service solution for false def fault codes on chassis with cummins engines. Symptoms are various active and inactive fault codes for def quality or def level. The issue could be caused by the coolant hoses swapped at the bulkhead fittings,
- 2020 - 2019 - 2018 - 2017 - 2016 - 2015 - 2014 -
Models from 2020
| 2020 FCCC S2C |
| 2020 FCCC S2RV |
| 2020 FCCC XBP |
| 2020 FCCC XBR |
| 2020 FCCC XBS |
| 2020 FCCC XCL |
| 2020 FCCC XCM |
| 2020 FCCC XCP |
| 2020 FCCC XCR |
| 2020 FCCC XCS |
Models from 2019
| 2019 FCCC S2RV |
| 2019 FCCC XBP |
| 2019 FCCC XBR |
| 2019 FCCC XBS |
| 2019 FCCC XCL |
| 2019 FCCC XCM |
| 2019 FCCC XCP |
| 2019 FCCC XCR |
| 2019 FCCC XCS |
Models from 2018
| 2018 FCCC S2RV |
| 2018 FCCC XBP |
| 2018 FCCC XBR |
| 2018 FCCC XBS |
| 2018 FCCC XCL |
| 2018 FCCC XCM |
| 2018 FCCC XCP |
| 2018 FCCC XCR |
| 2018 FCCC XCS |
Models from 2017
| 2017 FCCC S2RV |
| 2017 FCCC XBP |
| 2017 FCCC XBR |
| 2017 FCCC XBS |
| 2017 FCCC XCL |
| 2017 FCCC XCM |
| 2017 FCCC XCP |
| 2017 FCCC XCR |
| 2017 FCCC XCS |
Models from 2016
| 2016 FCCC XBP |
| 2016 FCCC XBR |
| 2016 FCCC XBS |
| 2016 FCCC XCL |
| 2016 FCCC XCM |
| 2016 FCCC XCP |
| 2016 FCCC XCR |
| 2016 FCCC XCS |
Models from 2015
| 2015 FCCC XBP |
| 2015 FCCC XBR |
| 2015 FCCC XBS |
| 2015 FCCC XCL |
| 2015 FCCC XCM |
| 2015 FCCC XCP |
| 2015 FCCC XCR |
| 2015 FCCC XCS |
Models from 2014
| 2014 FCCC XBP |
| 2014 FCCC XBR |
| 2014 FCCC XBS |
| 2014 FCCC XCL |
| 2014 FCCC XCM |
| 2014 FCCC XCP |
| 2014 FCCC XCR |
| 2014 FCCC XCS |
SS 1034491 False DEF Fault Codes SS 1034491 False DEF Fault Codes Applicable Vehicles<- Certain 2014 to 2020 model year FCCC B2, S2C, S2RV, XB & XC chassis with Cummins engines. Symptoms<- Various active and inactive fault codes for DEF Quality or DEF level. Issue<- There have been reports of fault codes for DEF quality or DEF level. Troubleshooting procedures may lead to replacing the DEF header assembly unnecessarily. In some cases, the header assembly has been replaced, but the codes kept returning. Solution<- The issue could be caused by the coolant hoses swapped at the bulkhead fittings, thru the frame rail causing the coolant flow inside the header assembly to be reversed. Please refer to the applicable install drawing for the DEF coolant lines found in the 23V BoM. The hoses have no markings so you will have to trace them back to the engine to verify which is supply and which is the return hose. If the hoses are crossed, simply exchange them on the bulkhead fittings, clear the codes and the issue should be resolved. Normal warranty applies. For units out of warranty, contact FCCC customer / technical support for goodwill policy consideration. 1