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Service bulletin SC-22-027

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 id11010953
Published by NHTSA2024-12-03
Manufacturer's numberSC-22-027
Manufacturer's date2022-03-03
Campaign id or software versionSC-22-027
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Bulletin Instruction for upgrading the body and vehicle controllers software on transit buses. Update to fault thresholds and additional parameters added from customer requests.

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

Electrical system

Vehicles listed
PROTERRA CATALYST2019 to 2021
PROTERRA ZX52019 to 2021

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