# Service bulletin E311

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: 11033373
- Published by NHTSA: 2026\-06\-03
- Manufacturer's number: E311
- Manufacturer's date: 2026\-05\-18
- NHTSA component: ENGINE

## NHTSA's summary

Kenworth \- The Warranty section has been updated to include Peterbilt\-specific SRT codes for cross\-division repair filing.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033373-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033373-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2018 to 2022 KENWORTH T680
- 2018 to 2022 KENWORTH T800
- 2018 to 2022 KENWORTH T880
- 2018 to 2022 KENWORTH W900
- 2018 to 2022 KENWORTH W990
- 2017 to 2021 PACCAR MX\-13

## Recalls for the same vehicles and component

- [21V080000](/recalls/nhtsa/21V080000.md), 2021-02-17: ENGINE
- [18V657000](/recalls/nhtsa/18V657000.md), 2018-09-21: ENGINE AND ENGINE COOLING:ENGINE:DIESEL

## Other bulletins for the same vehicles and component

- [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."
- [E343](/bulletins/11037451.md), 2026-09-23, Service bulletin: ENGINE. An exhaust manifold slip joint seal kit is now available for EPA 2017\-2024 PACCAR MX\-13 engines.
- [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.
- [E335](/bulletins/11035150.md), 2026-07-22, Service bulletin: ENGINE. 7/17/2026: Removed filter on KW Chassis List.
- [41\-029](/bulletins/11035149.md), 2026-07-22, Service bulletin: ENGINE. Incorrect air filters may be inadvertently installed in certain chassis equipped with under\-hood Donaldson air filter housings.
- [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.
- [E316](/bulletins/11035112.md), 2026-07-21, Service bulletin: ENGINE. The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage.
- [E311](/bulletins/11035111.md), 2026-07-21, Service bulletin: ENGINE. The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage.
- [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."

JSON: [/v1/bulletins/11033373](/v1/bulletins/11033373)

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