# Service bulletin C2223A

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: 10170441
- Published by NHTSA: 2020\-01\-21
- Manufacturer's number: C2223A
- Manufacturer's date: 2019\-12\-03
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This field action is being issued to address potential concerns with coolant level sensors installed in certain L9 CM2350 L123B and B6.7 CM2350 B121B MY17 and MY18 engines. This Campaign authorizes certified repair locations to replace the coolant level sensors. 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-10170441-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10170441-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS B6.7
- CUMMINS L9

JSON: [/v1/bulletins/10170441](/v1/bulletins/10170441)

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