# Service bulletin S4342\-202502

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: 11014710
- Published by NHTSA: 2025\-03\-03
- Manufacturer's number: S4342\-202502
- Manufacturer's date: 2025\-02\-28
- NHTSA component: FUEL/PROPULSION SYSTEM; ENGINE

## NHTSA's summary

Mack Trucks has determined that a select group of trucks were built with an AHI Module fuel pressure sensor which does not meet our specifications.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014710-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014710-9999.pdf)

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

## Components

Engine, Fuel system

## Vehicles listed

- 2024 to 2025 MACK ANTHEM \(AN\)
- 2024 to 2025 MACK GRANITE \(GR\)
- 2024 to 2025 MACK LR
- 2024 MACK PINNACLE \(PI/PN\)
- 2025 MACK PIONEER PR \(4\)
- 2024 to 2025 MACK TERRAPRO \(TE\)

## Recalls for the same vehicles and component

- [26V139000](/recalls/nhtsa/26V139000.md), 2026-03-11: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE
- [25V256000](/recalls/nhtsa/25V256000.md), 2025-04-17: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [2023588](/recalls/tc/2023588.md), 2023-10-31: Engine
- [23V731000](/recalls/nhtsa/23V731000.md), 2023-10-31: ENGINE

## Other bulletins for the same vehicles and component

- [TSB M\-913\-001 202609](/bulletins/11037730.md), 2026-10-02, Service bulletin: ENGINE; POWER TRAIN. Parker engine\-mounted hydraulic pump service bulletin.
- [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.
- [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 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\-2592\-1 202606](/bulletins/11034135.md), 2026-06-29, Service bulletin: ENGINE. The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With intermittent loss of throttle.
- [CBR\-2591\-1 202606](/bulletins/11034133.md), 2026-06-29, Service bulletin: ENGINE. The purpose of this CBR it to provide release notes for the recent Engine ECU software.
- [CBR\-2586\-1 202606](/bulletins/11034129.md), 2026-06-29, Service bulletin: ENGINE. The purpose of this CBR is to address issues of exhaust stack rotation on version 4 products.
- [CBR 2465\-6 202605](/bulletins/11033131.md), 2026-06-02, Service bulletin: ELECTRICAL SYSTEM; ENGINE. CBR to diagnosis issues with the Proactive Engine Restart system and Hood Open message.
- [S4757 022026](/bulletins/11029456.md), 2026-03-03, Service campaign: ENGINE. SC \- Certain model AN\(4\)’s and PR’s could experience DEF leaks or crystallization due to the installation of incorrect fasteners for the Urea Dosage Valve.
- [S4342 022026](/bulletins/11029453.md), 2026-03-03, Service campaign: FUEL/PROPULSION SYSTEM. SC \- Mack Trucks has determined that a select group of trucks were built with an AHI Module fuel pressure sensor which does not meet our specifications.

JSON: [/v1/bulletins/11014710](/v1/bulletins/11014710)

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