# Service bulletins for the 2025 Peterbilt 365

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.

18 bulletins from NHTSA, as of 2026-10-19.

- [42\-070](/bulletins/11038569.md), 2026-10-17, Service bulletin: UNKNOWN OR OTHER. Due to supplier constraints, an authorized aftermarket surge tank has been made available.
- [P001](/bulletins/11037541.md), 2026-09-29, Service bulletin: ENGINE. "Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes. 2 chassis added to the chassis list. Peterbilt: Dealers should check the chassis list and SIR weekly for VIN changes. 10 chassis added to the chassis list."
- [24KWL/PBL](/bulletins/11036291.md), 2026-08-20, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS. The verbiage in the Introduction section has been updated.
- [43\-088](/bulletins/11036289.md), 2026-08-20, Service bulletin: ENGINE. The procedure has been updated to include additional steps for verifying the software level on the vehicle electronic control unit \(VECU2\) and digital display \(DD\). Steps have also been added to the PACCAR Common Rail Injection 2 \(PCI2\) software verification.
- [43\-088](/bulletins/11035202.md), 2026-07-23, Service bulletin: ENGINE. This optional software update is now available for chassis equipped with EMY 2021B\-2023 PACCAR MX\-11 and MX\-13 engines. This update provides customers with additional time to service their trucks before a DEF\-related derate occurs. The software is being offered to customers in alignment with recently updated regulatory agency guidance.
- [E318](/bulletins/11035147.md), 2026-07-22, Service bulletin: ENGINE. The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage. The Warranty section has also been updated to include Peterbilt specific SRT codes for filing cross\-division repairs.
- [43\-088](/bulletins/11035108.md), 2026-07-21, Service bulletin: ENGINE. "The software is not yet available. The bulletin will be updated when more information is available."
- [43\-088](/bulletins/11034394.md), 2026-07-02, Service bulletin: ENGINE. "An optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B\-2023PACCAR MX\-11 and MX\-13 engines. This update provides customers with additional time to service theirtrucks before a DEF\-related derate occurs. The software is being offered to customers in alignment withrecently updated regulatory agency guidance."
- [43\-080](/bulletins/11033918.md), 2026-06-17, Service bulletin: ELECTRICAL SYSTEM. "KW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The repair procedure has been updated with additional note boxes for clear instructions. PB: The repair procedure has been updated with additional note boxes for clear instructions."
- [45\-070](/bulletins/11032293.md), 2026-05-06, Service bulletin: ENGINE. The attached procedures document has been updated with more detail and explanations. This is not a stand\-alone procedure. Cummins Quickserve troubleshooting will specify the use of these procedures while troubleshooting specific fault codes.
- [E338](/bulletins/11032288.md), 2026-05-06, Service campaign: ENGINE. Certain EPA21 PACCAR MX engines are equipped with PHINIA fuel injectors that do not meet PHINIA’s manufacturing specifications.
- [45\-070](/bulletins/11028314.md), 2026-02-05, Service bulletin: ENGINE. Procedure pictures updated for clarity. When troubleshooting Cummins X15 fault codes 555 or 556, follow this additional testing, inspection, and documentation procedure to help identify the root cause of dusted engines. This is not a stand\-alone process but must be used alongside Cummins troubleshooting steps. Cummins Quickserve will reference this bulletin for fault codes 555 or 556.
- [CE033](/bulletins/11021404.md), 2025-08-05, Warranty extension: ENGINE. 32 fuel injector part numbers \(16 for MX\-11 and 16 for MX\-13\) have been added to this warranty policy.
- [E318](/bulletins/11020043.md), 2025-07-02, Service bulletin: ENGINE; FUEL/PROPULSION SYSTEM. Newly designed fuel injectors are available for EPA2021 compliant PACCAR MX\-series engines to optimize engine performance. Injectors must be replaced as a full set \(6 injectors\) and associated software must be updated at the same time.
- [43\-080 PB](/bulletins/11016473.md), 2025-04-04, Service campaign: ELECTRICAL SYSTEM. As of 03/25/2025, this campaign has resumed. Software updates are now available to complete this campaign.
- [E327](/bulletins/11014768.md), 2025-03-04, Emissions: ELECTRICAL SYSTEM; ENGINE. "Vehicles equipped with PACCAR MX engines with Engine Software Version NA202 or NA206 may display a dash STOP lamp incorrectly. PCI\-2 software on these chassis must be reverted from NA202 to NA201 \(Pack 2 injectors\) or from NA206 to NA191 \(Pack 1 injectors\) to prevent incorrect STOP lamp display.
- [24PBL](/bulletins/11013775.md), 2025-02-05, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS; UNKNOWN OR OTHER; ELECTRICAL SYSTEM. Safety Recall Updated software and procedures are now available. Certain Vehicle Model Year 2021\-2025 Peterbilt chassis configured for trailer towing require a software update for the Bendix EC80 ABS ECU. Software update procedures for certain Battery\-Electric Vehicles \(BEV\) and EC80 ABS ECU part numbers are not yet available. This bulletin will be updated when software update procedures are available for these chassis. Safety Recall publish date: 1/10/25
- [E307](/bulletins/10254171.md), 2024-05-04, Service bulletin: POWER TRAIN; ENGINE AND ENGINE COOLING. CARB Emission s Manufacturer Warranty term and/or kilometers conversion displayed in certain EMY 2022\-2023 PX\-7 or PX\-9 Operator’s Manuals are incorrect.

JSON: [/v1/vehicles/2025_peterbilt_365/bulletins](/v1/vehicles/2025_peterbilt_365/bulletins)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%202025%20Peterbilt%20365&page=https%3A%2F%2Fopen.wenmarpro.com%2Fmakes%2Fpeterbilt%2F365%2F2025%2Fbulletins&vehicle=2025%20Peterbilt%20365)