# Service bulletin C2191C

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: 10173919
- Published by NHTSA: 2020\-04\-20
- Manufacturer's number: C2191C
- Manufacturer's date: 2020\-03\-13
- NHTSA component: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING

## NHTSA's summary

This field action authorizes certified repair locations to recalibrate the Engine Control Module \(ECM\) on certain B6.7 CM2350 engines with a product improvement calibration for improved reliability of the Cummins Engine\(s\). This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10173919-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10173919-9999.pdf)

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

## Components

Electrical system, Engine

## Vehicles listed

- CUMMINS B6.7

JSON: [/v1/bulletins/10173919](/v1/bulletins/10173919)

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