# Service bulletin C2112B

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: 10170332
- Published by NHTSA: 2020\-01\-21
- Manufacturer's number: C2112B
- Manufacturer's date: 2019\-12\-13
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This field action authorizes certified repair locations to upfit certain ISC and ISL CM2250 engines with an improved Selective Catalytic Reduction \(SCR\) Catalyst. Any SCR Part Number found in the Affected Part Number Column should be replaced. This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10170332-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10170332-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS ISC
- CUMMINS ISL

JSON: [/v1/bulletins/10170332](/v1/bulletins/10170332)

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