2020 Kenworth T680 Technical Service Bulletins

67 technical service bulletins (TSBs) are on record for the 2020 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.

• 10180726Sep 25, 2020Equipment, Body and structure. Information only: In 2020, Peterbilt and Kenworth began using the same M10, M12, M16, and M20 frame fasteners on all vehicles. Torque specifications for these fasteners are different from previous fasteners.
• 10179371Aug 26, 2020Electrical system, Engine cooling, Equipment. Fix-As-Fail – The Master Switch Module (MSM) may lose dash switch memory and functionality when the battery disconnect switch is cycled. An improved MSM is available to resolve the issue.
• 10177942Jul 21, 2020Fuel system. Non-Safety Campaign – The end cap welds on certain fuel tanks may not meet internal quality standards due to improper weld equipment settings. The fuel tanks will be replaced.
• 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.
• 10173205Mar 17, 2020Equipment. Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
• 10172037Feb 26, 2020Visibility (wipers, defrost, mirrors). Fix-As-Fail: The seal on T680, T880, and W990 windshields may be delaminated. Replace the windshield and encapsulated seal to resolve the issue.
• 10171021Jan 31, 2020Vehicle speed control, Brakes. Information Only - Driver Performance Assistance (DPA) Coasting and Braking Scores Not Incrementing, Stays at 50%. The average score will never change nor create driver assistance popups based upon driver’s actions. A future software update will resolve the issue. This bulletin will be updated when the software update becomes available.
• 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.
• 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.
• 10169711Dec 10, 2019Equipment, Wheels, Transmission and drivetrain. This bulletin has been obsoleted and replaced by Safety Recall 19KWE.
• 10168654Nov 27, 2019Vehicle speed control. Fix As Fail-Shudder sensation near the governed vehicle speed when using cruise control due to excessive control messaging from VECU. A VECU software update is available to correct the condition.
• 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).
• 10164375Aug 23, 2019Engine cooling. Fix-As-Fail: Two separate causes have been identified as root cause of intermittent low coolant indicator illumination.
• 10161188Jun 10, 2019Equipment, Latches, locks and linkages, Other or unknown. Non Safety Campaign: Holland Series FW17 fifth wheel handles may remain in an unlocked position when coupling to a parked trailer.
• 10159674Apr 8, 2019Equipment. Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
• 10186164Jul 7, 2016Equipment. T680 predictive cruise control(PCC) incompatibility with cummins engine.

← All problems reported for the 2020 Kenworth T680