# Service bulletin TSB210187\-032020

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: 10233702
- Published by NHTSA: 2023\-04\-05
- Manufacturer's number: TSB210187\-032020
- Manufacturer's date: 2023\-03\-20
- NHTSA component: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of the issue of combination of one or all DEF header fault code\(s\) 3868, 4572 and/or 4677 getting logged. This is an update to the previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10233702-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10233702-9999.pdf)

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

## Components

Engine, Exhaust and emissions

## Vehicles listed

- CUMMINS ISB6.7
- CUMMINS ISL 9
- CUMMINS ISX12
- CUMMINS ISX15
- CUMMINS L9
- CUMMINS X12
- CUMMINS X15

JSON: [/v1/bulletins/10233702](/v1/bulletins/10233702)

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