# Service bulletin CBR 2465\-6 202605

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.

- Type: Service bulletin
- NHTSA id: 11033131
- Published by NHTSA: 2026\-06\-02
- Manufacturer's number: CBR 2465\-6 202605
- Manufacturer's date: 2026\-05\-29
- NHTSA component: ELECTRICAL SYSTEM; ENGINE

## NHTSA's summary

CBR to diagnosis issues with the Proactive Engine Restart system and Hood Open message.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033131-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033131-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine

## Vehicles listed

- 2026 to 2027 MACK ANTHEM AN \(4\)
- 2025 to 2027 MACK PIONEER PR \(4\)

## Recalls for the same vehicles and component

- [24V792000](/recalls/nhtsa/24V792000.md), 2024-10-23: ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE

## Other bulletins for the same vehicles and component

- [TSB M\-371\-005A 202609](/bulletins/11037821.md), 2026-10-02, Service bulletin: ELECTRICAL SYSTEM. Jumper Harness Repair for Version 4 Mack Trucks
- [TSB M\-913\-001 202609](/bulletins/11037730.md), 2026-10-02, Service bulletin: ENGINE; POWER TRAIN. Parker engine\-mounted hydraulic pump service bulletin.
- [TSB M\-373\-003 202609](/bulletins/11037728.md), 2026-10-02, Service bulletin: ELECTRICAL SYSTEM. Power Cable Alternator Replacement
- [CBR 2590\-3 202609](/bulletins/11037725.md), 2026-10-02, Service bulletin: ELECTRICAL SYSTEM. Instrument Cluster Going Dark
- [CBR 2496\-18 202609](/bulletins/11037724.md), 2026-10-02, Service bulletin: ELECTRICAL SYSTEM. The purpose of this CBR is outline the interim software solution for PR\(4\) and AN\(4\).
- [CBR 2483\-6 202609](/bulletins/11037668.md), 2026-10-01, Service bulletin: ELECTRICAL SYSTEM. Diagnostic instructions for CAN network communication issues.
- [TSB M257005 202608](/bulletins/11036590.md), 2026-09-01, Service bulletin: ENGINE. Loose CCV mounting bolts and oil leak at CCV due to cracking of the housing. Mounting hardware found to be under\-torqued after the vehicle was delivered.
- [CBR 2597 202608](/bulletins/11036586.md), 2026-09-01, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. 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 202608](/bulletins/11036585.md), 2026-09-01, Service bulletin: ENGINE; ELECTRICAL SYSTEM. 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 202608](/bulletins/11036583.md), 2026-09-01, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. 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.

JSON: [/v1/bulletins/11033131](/v1/bulletins/11033131)

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