# Service bulletin CBR 2171\-11 202511

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: 11026025
- Published by NHTSA: 2025\-12\-03
- Manufacturer's number: CBR 2171\-11 202511
- Manufacturer's date: 2025\-11\-22
- NHTSA component: ENGINE; ELECTRICAL SYSTEM

## NHTSA's summary

CBR \- Mack Temperature Sensor Troubleshooting Guide

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026025-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026025-9999.pdf)

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

## Components

Electrical system, Engine

## Vehicles listed

- 2016 to 2017 MACK ANTHEM \(AN\)
- 2018 to 2026 MACK ANTHEM \(AN\)
- 2014 to 2018 MACK CHU
- 2014 to 2018 MACK CXU
- 2019 to 2026 MACK GRANITE \(GR\)
- 2014 to 2016 MACK GRANITE \(GU\)
- 2017 to 2019 MACK GRANITE \(GU\)
- 2014 to 2017 MACK LEU
- 2015 to 2026 MACK LR
- 2016 MACK PINNACLE \(PI/PN\)
- 2017 to 2026 MACK PINNACLE \(PI/PN\)

## Recalls for the same vehicles and component

- [25V382000](/recalls/nhtsa/25V382000.md), 2025-06-10: ELECTRICAL SYSTEM:12V/24V/48V BATTERY
- [25V256000](/recalls/nhtsa/25V256000.md), 2025-04-17: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [24V792000](/recalls/nhtsa/24V792000.md), 2024-10-23: ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE
- [2024194](/recalls/tc/2024194.md), 2024-03-27: Electrical
- [24V232000](/recalls/nhtsa/24V232000.md), 2024-03-27: ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS
- [2023630](/recalls/tc/2023630.md), 2023-11-22: Electrical
- [2023588](/recalls/tc/2023588.md), 2023-10-31: Engine
- [23V731000](/recalls/nhtsa/23V731000.md), 2023-10-31: ENGINE
- [23V310000](/recalls/nhtsa/23V310000.md), 2023-05-02: ELECTRICAL SYSTEM:HORN
- [2023021](/recalls/tc/2023021.md), 2023-01-24: Electrical

## 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.
- [S4533 202608](/bulletins/11036596.md), 2026-09-02, Service campaign: ENGINE. Mack Trucks has determined that certain AN model trucks equipped with an MP8 Turbo Compound \(TC\) engine may experience TC Double Idler Gear failure due to incorrect bearing preload. TC units within this population are suspected to be affected, which could result in failure and potential engine damage. For the affected vehicle population, please follow the instructions provided below to remove the TC unit, replace the double idler gear with a new one, and reinstall the TC unit.
- [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 159 202608](/bulletins/11036580.md), 2026-09-01, Service bulletin: ELECTRICAL SYSTEM. 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

JSON: [/v1/bulletins/11026025](/v1/bulletins/11026025)

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