Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
P001
KW: The chassis list has been updated to include 1 chassis. The total chassis count is now 53. A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section. PB: The chassis list has been updated to include 8 chassis. The total chassis count is now 130. A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section.
P002
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.
P003
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 1 chassis. The total chassis count is now 10. A link to the PACCAR Powertrain Prognostics Webcast has been added in the Links section.
43-089
This optional software update is expected to be available after 08/28/2026.
24KWC/24PBC
Updated Sheppard Steering Gear Classification Tool link in Inspection Procedure
24KWL/PBL
The verbiage in the Introduction section has been updated.
43-088
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.
46-029
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.
14-037
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.
41-029
Incorrect air filters may be inadvertently installed in certain chassis equipped with under-hood Donaldson air filter housings.
E316
The Condition, Chassis Affected, Service Action, Warranty, and Procedure sections have been updated to include the latest prognostics bulletin verbiage.
E318
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.
T024
KW & PB: New software is available for download. The DAVIE4 cache must be cleared before attempting to reprogram a chassis that is experiencing problems to ensure the latest version of software is installed. Follow all steps in the attached procedures before submitting a TCS case.
46-027
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.
T-024
The repair procedure has been updated to include diagnostic steps.
27-012
The attachment for Eaton bulletin TAIB-1015 has been updated to the latest version to improve process flow.
43-080
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
Updated primary and/or secondary chassis modules for certain pre-production Kenworth chassis are now available for installation.
99-051
There is an update to the CARB Base Emissions Warranty Limits table and Manufacturer’s Warranty Coverage section in certain Engine Model Year (EMY) 2025 MX-11 and MX-13 Operator’s Manuals.
02-177
Troubleshooting procedures for 2.1m cab power windows are now available.
43-087
(KW) Certain T680 / T800 / T880 / W900 / W990 have updated GHG labels available for order and installation.
41-024
Procedures have been updated to include additional truck models in the service intervals table.
E338
Certain EPA21 PACCAR MX engines are equipped with PHINIA fuel injectors that do not meet PHINIA’s manufacturing specifications.
45-070
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.
14-034
Bogie Crossmember Torque Value Update - Procedure has been updated to correct torque values.
36-010
Bendix Fusion Camera Parameter Correction - (KW) Certain Kenworth T680 chassis may have certain software parameters out of specification. Certain out of specification parameters may result in customer dissatisfaction. (PB) Certain Peterbilt Model 579 chassis may have certain software parameters out of specification. Certain out of specification parameters may result in customer dissatisfaction.
E326
EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX engines.
01-090
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.
24KWC/PBC
Sheppard Recall Update March 2026 - The Parts section has been updated with revised steps for opening a TCS365 Order Support – Order Inquiry case.
24KWF/PBF
Sheppard Recall Update March 2026 - The Parts section has been updated with revised steps for opening a TCS365 Order Support – Order Inquiry case.
37-004
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.
43-083
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.
24PBE_KWE
The Parts section has been updated to clarify that freight charges for safety recall orders should not be passed on to the end customer.
24KWE / 24PBE
The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between the right-hand shift stalk and the vehicle may result in the vehicle being disabled after it comes to a stop, thereby increasing the risk of crash or injury. A warning will appear on the dash display when communication is lost, including transmission or engine warnings, “!” next to DNR/DNRP indicator, “-“ in the DNR/DNRP indicator, and/or chimes, depending upon whether you are operating a diesel/gas or battery electric vehicle.
46-024
CARB Label Procedure Update The repair procedure removes the aftermarket change request, adds GHG label inspection, and directs dealers to open a TCS365 case to order new labels. Warranty codes for inspection and label replacement have been updated. Certain Battery Electric Vehicles that are subject to California Air Resources Board (CARB) regulations have GHG labels that are missing the CARB Enhanced EV and FCEV Statement.
24PBE_24KWE
24PBE_24KWE RH Shift Stalk Update Warranty section has been updated with revised verbiage for picture requirements.
43-076
Certain vehicle model years 2020-2025 K270, K370, T270, T280, T370, T380, T480, T680, T880, W900 chassis have updated Greenhouse Gas (GHG) labels available for installation.
24KWE/24PBE
The parts section has been updated for clarity. The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between the right-hand shift stalk and the vehicle may result in the vehicle being disabled after it comes to a stop, thereby increasing the risk of crash or injury. A warning will appear on the dash display when communication is lost, including transmission or engine warnings, “!” next to DNR/DNRP indicator, “-“ in the DNR/DNRP indicator, and/or chimes, depending upon whether you are operating a diesel/gas or battery electric vehicle.
25PACF
Parts and procedures are now available for all affected chassis equipped with Vehicle Electronic Control Unit (VECU) part number Q21-1157-013-011 / Q21-1157-013-013 / Q21-1157-002-002 / Q21-1157-004-004 / Q21-1157-006-006 / Q21-1157-009-009. See attached Parts Matrix for required parts per chassis.
27-011
A transmission control module (TCM) software update is now available for certain T680 / T880 / W900 / W990 chassis with Eaton Endurant transmissions running TCM software version 5516372, where the PTO fails to operate or engage. Please see the attached Eaton bulletin TAIB- 1021 in the Attachments section of this bulletin for complete details.
24PBE/KWE
The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between the right-hand shift stalk and the vehicle may result in the vehicle being disabled after it comes to a stop, thereby increasing the risk of crash or injury. A warning will appear on the dash display when communication is lost, including transmission or engine warnings, “!” next to DNR/DNRP indicator, “-“ in the DNR/DNRP indicator, and/or chimes, depending upon whether you are operating a diesel/gas or battery electric vehicle.
24KWE
The right-hand shift stalk may have an improper wire harness terminal crimp within the wire harness connector. Loss of communication between the right-hand shift stalk and the vehicle may result in the vehicle being disabled after it comes to a stop, thereby increasing the risk of crash or injury. A warning will appear on the dash display when communication is lost, including transmission or engine warnings, “!” next to DNR/DNRP indicator, “-“ in the DNR/DNRP indicator, and/or chimes, depending upon whether you are operating a diesel/gas or battery electric vehicle.
25PACG
The 15-inch digital display in certain model year 2024–2026 Kenworth chassis may enter recovery mode (blue wrench screen) without prior indication. The screen becomes non-responsive and may result in non-compliance with FMVSS/CMVSS 101 (Controls and Displays), 121 (Air Brake Systems), 136 (Electronic Stability Control Systems for Heavy Vehicles). Because of a loss of speedometer and other functionality such as warnings, indicators, and gauges, the driver will not see the truck speed or the warnings that appear on the digital display. A loss of information on the digital display may increase the risk of a crash.
R2405
All parts necessary to complete Phase 2 of this bulletin are now available. This retrofit provides certain chassis equipped with Cummins X15N (Natural Gas) engines with production level parts to replace preproduction parts installed at the time of manufacture.
CE033
32 fuel injector part numbers (16 for MX-11 and 16 for MX-13) have been added to this warranty policy.
E323
A required spacer tool set is now available to streamline the injector replacement process. The spacer tool set allows certain fuel system components to be loosened instead of removed to provide access to the injectors. See Bulletin 98-031 for details. Tools are not reimbursable through this Bulletin.
R2306 - KW
EMUX retrofit procedures updated to make it clear that the VECU3 must have software updated and vehicle mileage confirmed correct before updating the Digital Display. Parts and Procedure section also updated to include the Vehicle Emissions Control Information label ordering and installation instructions. This label is required for all chassis involved in R2306. Included additional reference to Cummins bulletin C7014 in the procedure section for ordering emissions labels.
25WC/PBC - KW
Safety Recall Certain Kenworth T680E Battery Electric Vehicle (BEV) chassis equipped with certain Accelera High VoltageInterlock Loop (HVIL) circuit configurations may experience a sudden loss of high voltage power with unintended opening of electrical contractors, which may occur without warning. This can result in a loss ofpropulsion and may increase the risk of a crash. Software version verification, along with the installation of an upgraded circuit overlay harness kit, is required to address this issue.
R2405 - KW
Due to parts availability, this bulletin will be divided into 2 phases. Phase 1 will bring affected chassis into emissions compliance before 06/30/2025 to avoid fines and penalties. Phase 2 will include all parts that are not currently available but are necessary to bring chassis up to production level. This bulletin will be updated once all Phase 2 parts become available. The emissions exemption for all chassis involved in this retrofit expires on 06/30/2025. After that date, all chassis that have not received this Phase 1 Retrofit will be out of compliance with emissions regulations and illegal to operate. NOTE If emissions exemptions are allowed to expire, vehicle owners could receive civil fines per regulation 40 CFR 19.4 up to $5,911 per engine. In addition, owners may be required to discontinue operation of the vehicle until the retrofit is completed.
25KWC
Safety Recall – Interim Notification Certain Kenworth T680E Battery Electric Vehicle (BEV) chassis equipped with certain Accelera High VoltageInterlock Loop (HVIL) circuit configurations may experience a sudden loss of high voltage power with unintended opening of electrical contractors, which may occur without warning. This can result in a loss of propulsion and may increase the risk of a crash. This bulletin will be updated when parts and procedures are available.
E322 - KW
PSB E322: EMY2024 and EMY2025 CARB MX-13 Software Update Campaign Software Update is now available. Engine software must be updated to NA-110C before releasing chassis to final customers. Certain Vehicle Model Year 2025 T680/T880 chassis equipped with Engine Model Year (EMY) 2024 or 2025 CARB MX-13 engines and NA-100C software may experience a Malfunction Indicator Lamp (MIL) due to a software issue. Without this update, a derate may occur.
24KWH
Safety Recall Refer to Cummins Safety Recall (Campaign) C7083. Cummins alerted Kenworth to a defect which relates to motor vehicle safety in certain Cummins X15 engines equipped with certain fuel pumps. Refer to Cummins Safety Recall (Campaign) C7083 for repair information.
E322
PSB E322: EMY2024 CARB MX-13 Software Update Campaign – Interim Notification Certain model year 2025 T680/T880 chassis equipped with EMY2024 CARB MX-13 engines and NA-100C software may experience a Malfunction Indicator Lamp (MIL) due to a software issue. If ignored, a derate may occur. This bulletin will be updated once software is available.
24KWF
SAFETY RECALL Repair parts and procedures are now available. Certain Kenworth vehicles from model year 2025 may contain steering gear(s) with a sector shaft that may not meet hardness requirements for the gear teeth due to improper heat-treating during assembly. Sector shaft gear teeth with lower than required hardness may prematurely wear, crack, or fracture. A fractured gear tooth may interfere with the gear mechanism leading to binding which in turn may increase the likelihood of a crash.
04-024
Campaign Certain T680 Next Gen fairings may have a loose or missing bushing that allows the rear partial fairing to rattle during operation. Parts and procedures are available to replace the pin on the fairing (both sides) with a bolt/spacer combination to reduce fairing rattle.
46-010
A software update is available for T680E Battery Electric Vehicles. This software update corrects certain issues with odometer and cold weather operation.
24KWC
Safety Recall Inspection procedures are available. Steering gear serial numbers must be inspected to determine suspect gears. Certain steering gears may have been assembled incorrectly, causing the gear to fracture. This can cause a loss of steering control, increasing the risk of a crash.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.