# Service bulletin T2083B

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: 10158765
- Published by NHTSA: 2019\-04\-22
- Manufacturer's number: T2083B
- Manufacturer's date: 2019\-03\-15
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR; ENGINE

## NHTSA's summary

This field action authorizes certified repair locations to upfit certain ISB, ISC, and ISL CM2250 engines with an improved Selective Catalytic Reduction \(SCR\) Catalyst. The engine must show open for this field action, experience a complaint or symptom in which troubleshooting results in the replacement of the SCR, and the SCR part number must match the Affected Part Number list. 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-10158765-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10158765-9999.pdf)

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

## Components

Engine, Exhaust and emissions, Catalytic converter

## Vehicles listed

- CUMMINS ISB
- CUMMINS ISC
- CUMMINS ISL

JSON: [/v1/bulletins/10158765](/v1/bulletins/10158765)

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