# Service bulletin TSB250044

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: 11021546
- Published by NHTSA: 2025\-08\-06
- Manufacturer's number: TSB250044
- Manufacturer's date: 2025\-07\-16
- NHTSA component: FUEL/PROPULSION SYSTEM

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution steps for the air compressor of the battery electric system which may have an internal high voltage interlock loop issue, resulting in fault code 8174 \(HVESS HVIL Status \- Voltage Below Normal or Shorted to Low Source\) and fault code 8175 \(HVESS HVIL Status \- Condition Exists\) being reported. This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11021546-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11021546-9999.pdf)

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

## Components

Fuel system

## Vehicles listed

- CUMMINS BES

JSON: [/v1/bulletins/11021546](/v1/bulletins/11021546)

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