# Service bulletin FSB.0023

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: 10227631
- Published by NHTSA: 2022\-12\-12
- Manufacturer's number: FSB.0023
- Manufacturer's date: 2022\-11\-02
- NHTSA component: FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM

## NHTSA's summary

Instructed users of Peterbilt 520 vehicles equipped with Hexagon® Agility® compressed natural gas \(CNG\) fuel systems that the secondary ignition switch used for service purposes is not integrated with the Blue iQ? system and cannot be used for vehicle operation and troubleshooting.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10227631-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10227631-9999.pdf)

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

## Components

Electrical system, Fuel system

## Vehicles listed

- AGILITY FUEL SYSTEMS AGILITY FUEL SYSTEMS

JSON: [/v1/bulletins/10227631](/v1/bulletins/10227631)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20FSB.0023&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10227631&vehicle=Service%20bulletin%20FSB.0023)