# Service bulletin SS1034491

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10183320
- Published by NHTSA: 2020\-12\-01
- Manufacturer's number: SS1034491
- Manufacturer's date: 2020\-10\-13
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

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, thru the frame rail causing the coolant flow inside the header assembly to be reversed.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183320-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183320-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2020 FCCC S2C
- 2017 to 2020 FCCC S2RV
- 2014 to 2020 FCCC XBP
- 2014 to 2020 FCCC XBR
- 2014 to 2020 FCCC XBS
- 2014 to 2020 FCCC XCL
- 2014 to 2020 FCCC XCM
- 2014 to 2020 FCCC XCP
- 2014 to 2020 FCCC XCR
- 2014 to 2020 FCCC XCS

JSON: [/v1/bulletins/10183320](/v1/bulletins/10183320)

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