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Service bulletin SC-22-079

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11010711
Published by NHTSA2024-11-21
Manufacturer's numberSC-22-079
Manufacturer's date2022-07-05
Campaign id or software versionSC-22-079
NHTSA componentELECTRICAL SYSTEM; SERVICE BRAKES

NHTSA's summary

Instructions for a vehicle controller update on the transit buses to fix bugs and protect components, specifically overhead charging, compressor and inverter. Improving diagnostics of these units.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes, Electrical system

Vehicles listed
PROTERRA CATALYST2019 to 2021
PROTERRA ZX52019 to 2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.