# Service bulletins for the 2023 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.

83 bulletins from NHTSA, as of 2026-10-19.

- [42\-070](/bulletins/11038569.md), 2026-10-17, Service bulletin: UNKNOWN OR OTHER. Due to supplier constraints, an authorized aftermarket surge tank has been made available.
- [02\-206](/bulletins/11037622.md), 2026-10-01, Service bulletin: STRUCTURE:BODY. Certain T680 Next Gen short hood chassis may be missing a bolt in the forward fairing.
- [32\-014](/bulletins/11037549.md), 2026-09-29, Service bulletin: ELECTRICAL 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.
- [9\-049](/bulletins/11037546.md), 2026-09-29, Service campaign: UNKNOWN OR OTHER. Certain Kenworth EMY 2022 T680, T880 and W990 chassis may not contain an EAS operator’s manual in the vehicle’s glovebox literature packet.
- [P001](/bulletins/11037541.md), 2026-09-29, Service bulletin: ENGINE. "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."
- [E343](/bulletins/11037451.md), 2026-09-23, Service bulletin: ENGINE. An exhaust manifold slip joint seal kit is now available for EPA 2017\-2024 PACCAR MX\-13 engines.
- [01\-093](/bulletins/11036341.md), 2026-08-25, Service bulletin: UNKNOWN OR OTHER. "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 protect the evaporator core tubing and TXV seals."
- [24KWL/PBL](/bulletins/11036291.md), 2026-08-20, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS. The verbiage in the Introduction section has been updated.
- [43\-088](/bulletins/11036289.md), 2026-08-20, Service bulletin: ENGINE. 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.
- [43\-088](/bulletins/11035202.md), 2026-07-23, Service bulletin: ENGINE. 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.
- [E335](/bulletins/11035150.md), 2026-07-22, Service bulletin: ENGINE. 7/17/2026: Removed filter on KW Chassis List.
- [41\-029](/bulletins/11035149.md), 2026-07-22, Service bulletin: ENGINE. Incorrect air filters may be inadvertently installed in certain chassis equipped with under\-hood Donaldson air filter housings.
- [E318](/bulletins/11035147.md), 2026-07-22, Service bulletin: ENGINE. 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.
- [E316](/bulletins/11035112.md), 2026-07-21, Service bulletin: ENGINE. The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage.
- [43\-088](/bulletins/11035108.md), 2026-07-21, Service bulletin: ENGINE. "The software is not yet available. The bulletin will be updated when more information is available."
- [43\-088](/bulletins/11034394.md), 2026-07-02, Service bulletin: ENGINE. "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."
- [46\-020](/bulletins/11034286.md), 2026-07-02, Service campaign: UNKNOWN OR OTHER. "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."
- [CE019](/bulletins/11034284.md), 2026-07-02, Service bulletin: ENGINE; POWER TRAIN. Multiple fuel injector part numbers have been added to this warranty policy.
- [CE033](/bulletins/11034281.md), 2026-07-02, Warranty extension: ENGINE; POWER TRAIN. "KW \& PB 14 fuel injector part numbers \(seven for MX\-11 and seven for MX\-13 engines\) have been added to this warranty policy."
- [CE019](/bulletins/11034063.md), 2026-06-25, Service bulletin: POWER TRAIN; ENGINE. Multiple fuel injector part numbers have been added to this warranty policy.
- [CE033](/bulletins/11034060.md), 2026-06-25, Service bulletin: POWER TRAIN; ENGINE. "KW \& PB 14 fuel injector part numbers \(seven for MX\-11 and seven for MX\-13 engines\) have been added to this warranty policy."
- [43\-080](/bulletins/11033918.md), 2026-06-17, Service bulletin: ELECTRICAL 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."
- [R2601](/bulletins/11033387.md), 2026-06-04, Service bulletin: ELECTRICAL SYSTEM. Updated primary and/or secondary chassis modules for certain pre\-production Kenworth chassis are now available for installation.
- [E335](/bulletins/11033354.md), 2026-06-03, Service bulletin: ENGINE. Warranty section has been updated to include hood length definitions and filing instructions for progressive damage.
- [02\-177](/bulletins/11033351.md), 2026-06-03, Service bulletin: ELECTRICAL SYSTEM. Troubleshooting procedures for 2.1m cab power windows are now available.

More: [the next page](/v1/vehicles/2023_kenworth_t680/bulletins?cursor=2026-06-03_11033351) (JSON)

JSON: [/v1/vehicles/2023_kenworth_t680/bulletins](/v1/vehicles/2023_kenworth_t680/bulletins)

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