# Service bulletin SC\-19\-82

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: 10163629
- Published by NHTSA: 2019\-08\-08
- Manufacturer's number: SC\-19\-82
- Manufacturer's date: 2019\-07\-03
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

A software error was causing a false state of charge calculation, shutting off the DC to DC converter, causing the low voltage batteries to lose charge. Loss of power to the low voltage battery could cause ancillary systems in the vehicle to turn off. Proterra issued this service bulletin to update the software that will make SOC calculations more accurate and prevent loss of power to the low voltage system.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10163629-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10163629-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2017 to 2019 PROTERRA CATALYST

JSON: [/v1/bulletins/10163629](/v1/bulletins/10163629)

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