WenmarOpen by Wenmar Pro

Service bulletin KC-2043 Rev 4

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 id10238826
Published by NHTSA2023-07-06
Manufacturer's numberKC-2043 Rev 4
Manufacturer's date2023-06-06
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); ELECTRICAL SYSTEM

NHTSA's summary

Engine Control Module (EMS) Software (MSW) Information - Improvement List, Through June 2023 - US21+OBD2020 Emissions

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, Engine, Engine control module

Vehicles listed
MACK ANTHEM (AN)2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
MACK GRANITE (GR)2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
MACK LR2021, 2022, 2023
MACK PINNACLE (PI/PN)2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
MACK TE2021
MACK TERRAPRO (TE)2022, 2023 (the catalog's model; the bulletin names a series or trim of it)

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

Recalls for the same vehicles and component
26V1390002026-03-11. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
KC-20432022-01-08. Service bulletin. Engine Control Module (EMS) Software (MSW) Information - Improvement List, November 2021 - US21+OBD2020 Emissions
KC-1302021-11-05. Service bulletin. Air In The Fuel System Tests, Common Rail Fuel System - US17+OBD16 and Newer Emissions