2024 Kenworth T680 Technical Service Bulletins

78 technical service bulletins (TSBs) are on record for the 2024 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.

• 11038726Oct 28, 2026Other or unknown. There is an update to the CARB Base Emissions Warranty Limits table and Manufacturer’s Warranty Coverage section in certain Engine Model Year (EMY) 2024-2026 PX-7 and PX-9 Operator’s Manuals.
• 11038713Oct 13, 2026Other or unknown. Removed hyperlinks for bulletin migration
• 11038711Oct 13, 2026Other or unknown. Removed hyperlinks for bulletin migration
• 11038710Oct 13, 2026Other or unknown. Removed hyperlinks for bulletin migration
• 11037622Oct 1, 2026Body and structure. Certain T680 Next Gen short hood chassis may be missing a bolt in the forward fairing.
• 11037549Sep 23, 2026Electrical system. This bulletin, the troubleshooting procedure, and the BMS Troubleshooting Checklist have been updated to show that the Autometer tool test results can be used in place of the Midtronics tool test results for fulfilling service and warranty requirements.
• 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."
• 11037451Sep 5, 2026Engine. An exhaust manifold slip joint seal kit is now available for EPA 2017-2024 PACCAR MX-13 engines.
• 11037479Sep 4, 2026Other or unknown, Electrical system. [SmartAir / KIMS] A/C systems may shut down prematurely when voltage levels drop below a certain threshold.
• 11037448Sep 3, 2026Engine. "KW: A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section. PB: The chassis list has been updated to include 2 chassis. The total chassis count is now 4. A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section."
• 11036427Aug 27, 2026Engine. "KW: A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section. PB: The chassis list has been updated to include 2 chassis. The total chassis count is now 4. A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section."
• 11036342Aug 21, 2026Engine. This optional software update is expected to be available after 08/28/2026.
• 11036341Aug 20, 2026Other or unknown. "KW: On certain T680 BEV chassis, installing an updated A/C suction line between the A/C compressor and thermostatic expansion valve (TXV) will help maintain optimal performance and protect the evaporator core tubing and TXV seals. PB: On certain Model 579 BEV chassis, installing an updated A/C suction line between the A/C compressor and thermostatic expansion valve (TXV) will help maintain optimal performance and…
• 11036293Aug 13, 2026Engine. This optional software update is expected to be available in late August 2026 for chassis equipped with EPA 2024 EMY 2024-2026 PACCAR MX-11 and MX-13 engines. This bulletin will be updated when the software is ready. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being offered to customers in alignment with recently updated regulatory…
• 11036292Aug 13, 2026Engine. This optional software update is expected to be available in late August 2026 for chassis equipped with EPA 2024 EMY 2024-2026 PACCAR MX-11 and MX-13 engines. This bulletin will be updated when the software is ready. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being offered to customers in alignment with recently updated regulatory…
• 11036291Aug 13, 2026Forward collision avoidance. The verbiage in the Introduction section has been updated.
• 11036290Aug 13, 2026Electrical system. When DAVIE version 26.21.2 is used to update the VECU3 to software version 3.4.46.0, the VECU3 5071 component group may display as --- after programming.
• 11036289Aug 13, 2026Engine. The procedure has been updated to include additional steps for verifying the software level on the vehicle electronic control unit (VECU2) and digital display (DD). Steps have also been added to the PACCAR Common Rail Injection 2 (PCI2) software verification.
• 11036288Aug 11, 2026Other or unknown. An improved transmission bracket is now available for replacement on certain chassis equipped with a PACCAR TX-12 transmission, featuring a more durable design for enhanced long-term performance.
• 11035433Aug 1, 2026Engine. This optional software update is expected to be available on 08/07/26 for chassis equipped with EPA 2024 EMY 2024-2026 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being offered to customers in alignment with recently updated regulatory agency guidance.
• 11035202Jul 21, 2026Engine. This optional software update is now available for chassis equipped with EMY 2021B-2023 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being offered to customers in alignment with recently updated regulatory agency guidance.
• 11035151Jul 21, 2026Engine, Electrical system. An optional software update is expected to be available on or after 07/31/26 for chassis equipped with EPA 2024 engine model year (EMY) 2024-2026 PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service their trucks before a DEF-related derate occurs. The software is being offered to customers in alignment with recently updated regulatory agency guidance.
• 11035149Jul 18, 2026Engine. Incorrect air filters may be inadvertently installed in certain chassis equipped with under-hood Donaldson air filter housings.
• 11035147Jul 10, 2026Engine. The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage. The Warranty section has also been updated to include Peterbilt specific SRT codes for filing cross-division repairs.
• 11035112Jul 10, 2026Engine. The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage.
• 11035108Jul 7, 2026Engine. "The software is not yet available. The bulletin will be updated when more information is available."
• 11034394Jun 29, 2026Engine. "An optional software update will be available on 07/06/2026 for chassis equipped with EMY 2021B-2023PACCAR MX-11 and MX-13 engines. This update provides customers with additional time to service theirtrucks before a DEF-related derate occurs. The software is being offered to customers in alignment withrecently updated regulatory agency guidance."
• 11034286Jun 27, 2026Other or unknown. "KW: A new electric power take-off (ePTO) motor mount shim and an improved spline shaft are available for certain T680 BEV chassis with ePTO motors. PB: A new electric power take-off (ePTO) motor mount shim and an improved spline shaft are available for certain Model 520 BEV and 579 BEV chassis with ePTO motors."
• 11034284Jun 25, 2026Engine, Transmission and drivetrain. Multiple fuel injector part numbers have been added to this warranty policy.
• 11034063Jun 24, 2026Transmission and drivetrain, Engine. Multiple fuel injector part numbers have been added to this warranty policy.
• 11033920Jun 13, 2026Electrical system. The currently published HD BEV Chassis with PACCAR EPowertrain Service (Built After 1/14/2026) de-energizing Procedures on ServiceNet cannot be utilized for certain pre-production Battery Electric Vehicle (BEV) chassis.
• 11033918Jun 3, 2026Electrical system. "KW: A new recommended repair has been added to verify the software level and close the campaign in SIR.The repair procedure has been updated with additional note boxes for clear instructions. PB: The repair procedure has been updated with additional note boxes for clear instructions."
• 11033387May 29, 2026Electrical system. Updated primary and/or secondary chassis modules for certain pre-production Kenworth chassis are now available for installation.
• 11033351May 6, 2026Electrical system. Troubleshooting procedures for 2.1m cab power windows are now available.
• 11033349May 5, 2026Other or unknown. (KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation.
• 11032876May 1, 2026Engine. Procedures have been updated to include additional truck models in the service intervals table.
• 11032288Apr 30, 2026Engine. Certain EPA21 PACCAR MX engines are equipped with PHINIA fuel injectors that do not meet PHINIA’s manufacturing specifications.
• 11032295Apr 28, 2026Other or unknown. (KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation. (PB) Certain Model 367 / 389 / 567 / 579 / 589 have updated GHG labels available for order and installation.
• 11032293Apr 17, 2026Engine. The attached procedures document has been updated with more detail and explanations. This is not a stand-alone procedure. Cummins Quickserve troubleshooting will specify the use of these procedures while troubleshooting specific fault codes.
• 11032290Apr 16, 2026Other or unknown. Bogie Crossmember Torque Value Update - Procedure has been updated to correct torque values.
• 11032297Apr 4, 2026Engine. EMY21-25 GHG Label Replacement (KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation. (PB) Certain Model 367 / 389 / 567 / 579 / 589 have updated GHG labels available for order and installation.
• 11032284Apr 1, 2026Electrical system, Engine. EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX engines.
• 11030936Mar 28, 2026Steering. Sheppard Recall Update March 2026 - The Parts section has been updated with revised steps for opening a TCS365 Order Support – Order Inquiry case.
• 11030935Mar 28, 2026Other or unknown. Bulletin Update 03/02/2026 - A Meritor OnTrac case submission is required prior to repairs being completed. Failure to do so may result in warranty claim denial. See the procedure section for more details.
• 11030933Mar 27, 2026Other or unknown. PACCAR MX-13 VECU3 Software Update - Certain heavy-duty chassis equipped with a PACCAR MX-13 engine are eligible for a Vehicle Electronic Control Unit (VECU3) software update.
• 11030930Mar 21, 2026Other or unknown. Exhaust Stack Isolators - Early wear of the polyurethane exhaust stack isolators may occur on certain Kenworth chassis due to excessive heat. Early wear of the polyurethane exhaust stack isolators may occur on certain Peterbilt chassis due to excessive heat.
• 11030927Mar 11, 2026Engine. Engine Air Filter Servicing UPDATE - Procedures are available to support the maintenance, service intervals, and intake system inspection process for all engine air intake system components.
• 11030922Mar 6, 2026Engine. EPA17-24 MX-13 Fuel Injector Connector - This bulletin has been revised to include EPA24 PACCAR MX-13 engines.
• 11029640Feb 27, 2026Engine. Fuel Injection Pump part number 2344776PEX for MX-13 engines has been added to this warranty policy.
• 11029789Feb 26, 2026Engine. Fuel Injection Pump part number 2344776PEX for EMY2022 MX-13 engines has been added to the Warranty Policy.

← All problems reported for the 2024 Kenworth T680