2016 Kenworth T680 Technical Service Bulletins

64 technical service bulletins (TSBs) are on record for the 2016 Kenworth T680. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11037541Sep 11, 2026Engine. "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."
• 11035148Jul 16, 2026Electrical system. The campaign expiration date has been changed to 03/01/2027.
• 11033351May 6, 2026Electrical system. Troubleshooting procedures for 2.1m cab power windows are now available.
• 11030931Mar 21, 2026Other or unknown. CARB Chassis Update - Chassis list updated with 5 KW and 31 PB additional chassis.
• 10254164Apr 9, 2024Brakes. Certain C500/T440/T470/T660/T680/T800/T880/W900 chassis may have air tank reservoirs that do not meet air volume requirements per FMVSS/CMVSS 121 “Air Brake Systems”. This bulletin will be updated when repair parts and procedures are available.
• 10244494Oct 18, 2023Engine cooling. 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.
• 10238382Jun 2, 2023Engine cooling. Certain chassis with Engine Model Year 2016-2021 PACCAR MX-11/MX-13, or EPA13 and EPA21 Cummins ISX12/ISX15/X15 engines that had a previously failed DEF sensor and with DEF sensor software disabled due to industry DEF sensor shortages will now be able to receive a replacement DEF sensor, DEF tank heater coolant control valve, and re-enabled DEF diagnostic software.
• 10238376Jun 1, 2023Engine cooling. E279: PACCAR MX-13/MX-11 Engine MY17 Software Incorrectly Sets DTC P1092 PACCAR MX-13/MX-11 Engine MY17 Software Incorrectly Sets DTC P1092 Emission Recall - PACCAR MX-13/MX-11 MY2017 software incorrectly sets DTC P1092, which could result in reduced available engine torque and/or engine protection mode. An engine software update is available that corrects the issue.
• 10232496Feb 24, 2023Engine cooling, Fuel system. Certain Model Year 2021-2024 chassis with PACCAR MX engines and optional fuel filter restriction virtual gauge may display incorrect restriction levels. The virtual gauge will be temporarily disabled until a revised sensor strategy is developed.
• 10218895Aug 3, 2022Engine cooling. Kenworth is providing guidance for PACCAR MX Engine Composite Oil Pan leak troubleshooting to avoid over-repairs and to provide warrantable repair guidance. Oil leaks, if not repaired, can lead to severe engine damage.
• 10201965Sep 21, 2021Fuel system. Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are available. As a temporary solution, after PACCAR confirms a DEF sensor is not available, a temporary software update will allow a vehicle to continue operation with a failed DEF sensor by disabling the DEF sensor diagnostics.
• 10198762Jun 14, 2021Engine cooling. Information Only – C hassis equipped with MY2021 B EPA emission s standards will be shipped through atleast the end of the 2021 calendar year without particulate matter (PM) sensors installed .
• 10198760Jun 8, 2021Engine cooling. An engine software update is required to resolve OBD system readiness, DEF doser diagnostics, and otherOBD system software related issues.
• 10188468Feb 25, 2021Engine cooling. Non-Safety Campaign – Chassis with the City Horn option may generate unexpected alerts. A VECU software update is available to resolve the issue.
• 10188467Feb 25, 2021Electrical 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.
• 10188550Feb 10, 2021Equipment, Visibility (wipers, defrost, mirrors). Information Only – Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.
• 10185190Dec 18, 2020Transmission and drivetrain, Equipment, Electrical system. 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.
• 10177935Jul 29, 2020Brakes. Fix-As-Fail - Bendix New-Gen Lightweight Steer Axle Drum Brake Spider Cracking
• 10177021Jun 8, 2020Electrical 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.
• 10173583Mar 27, 2020Body and structure. DEF tank covers may become loose and potentially crack on vehicles built before October 2019 with DEF tank part number M86-6221-003**(TANK-DEF MEDIUM ASSY) and M86-6222-003**(TANK-DEF LARGE, ASSY). Resolution is to resolve the vibration on the tank cover by adding bottom tank washers.
• 10173205Mar 17, 2020Equipment. Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
• 10173212Mar 3, 2020Vehicle 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.
• 10171030Jan 3, 2020Electrical 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.
• 10169706Dec 19, 2019Electrical system, Engine cooling. Emissions Campaign – The Engine Overspeed lamp may illuminate during a smoke opacity test. A software update is available to resolve the issue.
• 10169787Dec 18, 2019Electrical system. 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.
• 10168709Nov 21, 2019Engine cooling. Fix-As-Fail The evaporator core may crack in vehicles with the ISX-15 engine. An improved suction line has been released that removes stress transferred to the evaporator core.
• 10168703Nov 6, 2019Engine cooling. Information Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the A/C compressor.
• 10165583Sep 27, 2019Engine cooling, Equipment. Information Only – This bulletin provides information about the California Air Resources Board (CARB) Periodic Smoke Inspection Program (PSIP) and Heavy Duty Vehicle Inspection Program (HDVIP).
• 10164378Aug 28, 2019Engine cooling. Fix-As-Fail -“ Composite fittings used in the cooling system may crack, resulting in coolant leaks. Brass fittings are available to replace the composite fittings.
• 10164375Aug 23, 2019Engine cooling. Fix-As-Fail: Two separate causes have been identified as root cause of intermittent low coolant indicator illumination.
• 10164369Aug 2, 2019Equipment. Fix as Fail HVAC system may demonstrate inadequate temperature control, be stuck in defrost mode, or have intermittent changes in fan speed that can be remedied with an updated HVAC software.
• 10161168Jun 10, 2019Electrical system, Equipment. 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.
• 10159674Apr 8, 2019Equipment. Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
• 10154730Jan 24, 2019Electrical system. Non-Safety Campaign: Vehicles may have a fuse installed in the PDC (Power Distribution Center) in a location unable to support the amperage.
• 10152537Nov 6, 2018Equipment. Information: J1939 CAN BUS Best Practices
• 10143637Jun 29, 2018Electrical system. Fix-As-Fail: Bendix Wingman radars with ice/snow buildup on the optional PACCAR radar cover may experience false warnings and mild brake applications from the Wingman System.
• 10143499Jun 29, 2018Equipment. Fix-As-Fail: Bendix Wingman radars with ice/snow buildup on the optional PACCAR radar cover may experience false warnings and mild brake applications from the Wingman System.
• 10143640Jun 14, 2018Equipment. Non-Safety Campaign- Incorrect GHG emissions identifier label for the tire classification listed on printed label.
• 10143502Jun 14, 2018Equipment, Tires. Non-Safety Campaign- Incorrect GHG emissions identifier label for the tire classification listed on printed label.
• 10138445Apr 6, 2018Electrical system. Information only - Customer installed inverters may be wired incorrectly.
• 10136232Mar 26, 2018Electrical system. Non-Safety Campaign - OBD modem is unable to communicate to telematics systems.
• 10128646Jan 22, 2018Wheels. Fix-As-Fail ? There is an updated plug to fix leaking steer axle hubcaps.
• 10128643Jan 22, 2018Wheels. Fix-As-Fail ? There is an updated plug to fix leaking steer axle hubcaps.
• 10125013Nov 21, 2017Electrical system. Fix-As-Fail - A U1548 fault code is present in the DAVIE log file, with no fault lamp illuminated or other obvious symptoms.
• 10118724Sep 28, 2017Electrical system, Other or unknown. 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.
• 10118722Sep 27, 2017Engine cooling. Fix-As-Fail: Repair for horizontal exhaust diffuser configurations with broken brackets or cracked diffuser.
• 10119760Jun 30, 2017Electrical system. 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.
• 10097126Mar 9, 2017Equipment. Fix-as-fail: kenworth t680/t880 hvac panel and temperature mode doors not functioning properly
• 10092246Nov 8, 2016Transmission and drivetrain. Non-safety campaign: watson & chalin lift axle frame brackets with slotted lower mounting holes may exhibit cracking when fasteners are positioned at the upper portion of the slot. Installing a doubler plate may prevent cracks from developing. For vehicles where cracking is evident, a new updated side plate will be installed.
• 10092241Nov 4, 2016Equipment. Fix-as-fail: an internal issue may cause some hvac mode door actuators to fail. This will cause the hvac system to act erratically or constantly turn on and off.

← All problems reported for the 2016 Kenworth T680