WenmarOpen by Wenmar Pro

Service bulletin SC-21-149

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 id11013291
Published by NHTSA2025-01-31
Manufacturer's numberSC-21-149
Manufacturer's date2022-12-08
Campaign id or software versionSC-21-149
NHTSA componentFUEL/PROPULSION SYSTEM

NHTSA's summary

On the transit battery electric buses it was found that some of the HV batteries had a configuration improperly set causing the battery to not balance correctly reducing the vehicles range.

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

Fuel system

Vehicles listed
PROTERRA CATALYST2021
PROTERRA ZX52021 to 2022

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