# Service bulletin E279

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: 10238379
- Published by NHTSA: 2023\-07\-05
- Manufacturer's number: E279
- Manufacturer's date: 2023\-06\-01
- NHTSA component: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

## NHTSA's summary

An engine software defect exists in certain vehicles equipped with EMY17 MX\-13 and MX\-11 engines that pertains to timer action and count calibrations for a time\-based diagnostic. This diagnostic action checks fuel pressure and has no negative impact on tailpipe emissions. This soft ware may incorrectly set DTC – P1092.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10238379-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10238379-9999.pdf)

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

## Components

Engine, Exhaust and emissions

## Trouble codes named

P1092

## Vehicles listed

- 2017 PETERBILT 210
- 2017 PETERBILT 220
- 2017 PETERBILT 320
- 2017 PETERBILT 325
- 2017 PETERBILT 330
- 2017 PETERBILT 337
- 2017 PETERBILT 348
- 2017 PETERBILT 365
- 2017 PETERBILT 367
- 2017 PETERBILT 384
- 2017 PETERBILT 386
- 2017 PETERBILT 388
- 2017 PETERBILT 389
- 2017 PETERBILT 520
- 2017 PETERBILT 567
- 2017 PETERBILT 579
- 2017 PETERBILT 587

## Recalls for the same vehicles and component

- [19V282000](/recalls/nhtsa/19V282000.md), 2019-04-09: ENGINE; ELECTRICAL SYSTEM
- [18V657000](/recalls/nhtsa/18V657000.md), 2018-09-21: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- [2016289](/recalls/tc/2016289.md), 2016-06-08: Engine

## 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.
- [E311](/bulletins/11035343.md), 2026-07-30, Service bulletin: ENGINE. 105 chassis have been removed from the chassis list and unflagged in PRWS due to expiration of applicable warranty coverage. Total chassis population is 732.
- [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.
- [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.
- [E326](/bulletins/11032284.md), 2026-05-06, Emissions: ENGINE; ELECTRICAL SYSTEM. EPA17\-24 MX Fuel Injector Connector \- This bulletin has been revised to include all EPA17\-24 and CARB24 PACCAR MX engines.
- [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.
- [32\-025](/bulletins/11010926.md), 2024-12-03, Service bulletin: ENGINE. Info Only Unnecessary starter replacements can result from customer complaints regarding engine starting issues. A new Starter Troubleshooting Guide has been created to provide a comprehensive list of starting system checks, which should reduce unnecessary starter replacements and associated warranty claims. Engine starting system warranty claims now require a completed Starter Checklist, a Battery Pack Midtronics Report, and a Cable Drop Midtronics Report. Claims filed without these documents may be denied.
- [7\-700](/bulletins/11009757.md), 2024-11-05, Warranty extension: POWER TRAIN; ENGINE. 7/700 Service Agreement \- Letter Only.
- [E304](/bulletins/10244495.md), 2023-11-10, Service bulletin: ENGINE AND ENGINE COOLING. Emissions Recall Certain vehicles with PACCAR MX\-11 and MX\-13 EMY2016 engines with less than 300,000 miles \(482,803 km\) have been shown, in testing, to exceed regulatory limits for NOx and N2O emissions. This bulletin now applies to both Canadian and U.S. registered vehicles. Software is now available to remedy this emissions non\-compliance.

JSON: [/v1/bulletins/10238379](/v1/bulletins/10238379)

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