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October 18, 2023 Service bulletin

E304: PACCAR MX-11 and MX-13 EMY2016 NOx and N2O Exceedance Emissions Recall Certain vehicles with PACCAR...

Kenworth technical service bulletin E304 for 2015-2017 Kenworth T680 and 2015-2017 Kenworth T880.

Bulletin number
E304
Component
Engine and engine cooling
Summary
E304: PACCAR MX-11 and MX-13 EMY2016 NOx and N2O Exceedance 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. NOTE California-registered vehicles that received a letter must have the software updated AND California documentation completed regardless of vehicle mileage.

Owners of these vehicles have filed 4 complaints in the engine category.

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