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Service bulletin CBR 2545-1 202601

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 id11028049
Published by NHTSA2026-02-03
Manufacturer's numberCBR 2545-1 202601
Manufacturer's date2026-01-07
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

CBR - U114688 VMCU Communication Fault - AN (4) - PR (4).

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

Trouble codes named

U1146

Vehicles listed
MACK ANTHEM AN (4)2026 (the catalog's model; the bulletin names a series or trim of it)
MACK PIONEER PR (4)2025, 2026 (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
24V7920002024-10-23. ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE

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
TSB M-371-005A 2026092026-10-02. Service bulletin. Jumper Harness Repair for Version 4 Mack Trucks
TSB M-373-003 2026092026-10-02. Service bulletin. Power Cable Alternator Replacement
CBR 2590-3 2026092026-10-02. Service bulletin. Instrument Cluster Going Dark
CBR 2496-18 2026092026-10-02. Service bulletin. The purpose of this CBR is outline the interim software solution for PR(4) and AN(4).
CBR 2483-6 2026092026-10-01. Service bulletin. Diagnostic instructions for CAN network communication issues.
CBR 2597 2026082026-09-01. Service bulletin. The purpose of this CBR is to provide steps on how to correct a customer complaint of "Service Required" message for air filter replacement appears in the cluster. There may be no option in PTT or the cluster to reset the air filter service interval.
CBR 2596 2026082026-09-01. Service bulletin. The purpose of this CBR is to provide steps on how to correct a customer complaint of a no crank/engine start condition.
CBR 2429 2026082026-09-01. Service bulletin. This CBR solution outlines the procedures for diagnosing, replacing, calibrating, and programming Flexible Switch Panels and the Security and Cab Interface Module (SCIM) to resolve switch malfunction notifications and associated fault codes.
CBR 159 2026082026-09-01. Service bulletin. Mack Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC) During Engine Pre-heat (Intake Air Heater) Operation - Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer
TSB M-371-005 0720262026-08-03. Service bulletin. TSB - Jumper Harness Repair.