2018 Kenworth T440 technical service bulletins

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

• Oct 28, 2026 Service bulletinReplaced obsolete SRT codes with updated SRT codes.
• Sep 11, 2026 Service bulletinKenworth: Dealers should check the chassis list and SIR weekly for VIN changes
• Oct 28, 2025 Service bulletinSafety recall
• Oct 18, 2022 Service bulletinInfo Only
• May 10, 2022 Service bulletinSafety Recall – Interim Notification
• Feb 4, 2022 Service bulletinDue to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet...
• Sep 21, 2021 Service bulletinFix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are...
• Jun 22, 2021 Service bulletinSafety Recall – Cummins Fuel Rail Leak – the federal safety agency ID: 21V391 / TC: 2021-323, Cummins...
• Feb 10, 2021 Service bulletinInformation Only – Windshield washer pumps have a high No Trouble Found rate
• Dec 18, 2020 Service bulletinFix-As-Fail
• Oct 12, 2020 Service bulletinFix-As-Fail – The Battery Management System (BMS) may report the incorrect battery condition
• Jul 29, 2020 Service bulletinFix-As-Fail
• Jun 8, 2020 Service bulletinInformation Only:
• Mar 27, 2020 Service bulletinDEF tank covers may become loose and potentially crack on vehicles built before October 2019 with DEF tank...
• Mar 17, 2020 Service bulletinInformation Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment...
• Mar 3, 2020 Service bulletinInformation Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed,...
• Dec 18, 2019 Service bulletinInformation Only
• Nov 6, 2019 Service bulletinInformation Only:
• Sep 27, 2019 Service bulletinInformation Only –
• Aug 30, 2019 Service bulletinFix-As-Fail -“ C500, T440/T470, T800, W900 chassis HVAC Controllers may become unresponsive after...
• Jul 22, 2019 Service bulletinFix as Fail: Vehicles with Eaton Ultrashift Plus or Fuller Advantage Automated transmissions may display...