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Service bulletins for the 2015 Kenworth T680

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.

49 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
02-1772026-06-03. Service bulletin. ELECTRICAL SYSTEM. Troubleshooting procedures for 2.1m cab power windows are now available.
32-0172021-03-10. Service bulletin. ELECTRICAL SYSTEM. Non-Safety Campaign – The batteries may drain quickly due to the VECU not going to sleep. Updated VECU software is available to resolve the issue.
26-0372021-01-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY. Fix-As-Fail - Prior versions of Eaton Endurant transmission software may be prone to setting Linear Clutch Actuator (LCA) fault codes leading to possible LCA hardware replacement.
32-0152020-07-03. Service bulletin. ELECTRICAL SYSTEM. Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
34-0852020-04-03. Service bulletin. VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM. Information Only – Vehicles may have the connector seals on the wheel speed sensor incorrectly installed, which may lead to water intrusion and corrosion in some vehicles.
32-0132020-02-05. Service bulletin. ELECTRICAL SYSTEM. Information Only: The AutoStart System Test does not recognize the hood opening and closing when running the test on a model 579 or 567 chassis equipped with a VECU software version 9.8 and 9.9. The issue will be fixed on a future VECU software update. This bulletin will be updated when the resolution is available.
03-0712020-01-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Information Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer. The issue can be temporarily resolved using any one of the included procedures.
43-0632020-01-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Emissions Campaign – The Engine Overspeed lamp may illuminate during a smoke opacity test. A software update is available to resolve the issue.
03-0702019-06-11. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY. Fix as Fail: Vehicles built 11/30/15 to 7/18/16 may display an error message in the Service Advised display after updating CECU software.
32-0102018-05-21. Service bulletin. ELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. Information only - Customer installed inverters may be wired incorrectly.
63-0082018-05-07. Service bulletin. ELECTRICAL SYSTEM. Non-Safety Campaign - OBD modem is unable to communicate to telematics systems.
26-0292017-12-08. Service bulletin. ELECTRICAL SYSTEM. Fix-As-Fail - A U1548 fault code is present in the DAVIE log file, with no fault lamp illuminated or other obvious symptoms.
510122017-10-21. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Fix-as-Fail: CECU3 software P30-1011-139 software has been released. This software update is not mandatory. This software requires MY2017 PCC software when installed on MY2015/2016 vehicles equipped with PCC.
34-0602017-10-12. Service bulletin. ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; TRAILER HITCHES. Non Safety Campaign: The circuit for the Trailer Hotline/Trailer Power may not be properly protected on Model T680/T880 vehicles equipped with this option.
51-0072017-02-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. FIX-AS-REQUESTED - NAV+ HD SOFTWARE UPDATE FOR RANDOM REBOOT FIX AND MP3 FEATURES ENABLED.
TIB-E-1102015-03-11. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. KENWORTH: A NEW SOFTWARE IS AVAILABLE FOR THE DRIVER PERFORMANCE ASSISTANT (DPA) FOR RETROFITTING TRUCKS TO IMPROVE FUEL ECONOMY AND HAVE MAINTENANCE COSTS REDUCED. MODEL T680, 880. *PE

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.