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.
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.
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
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.
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.
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.
E326
EPA17-24 MX Fuel Injector Connector - This bulletin has been revised to include all EPA17-24 and CARB24 PACCAR MX engines.
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.
15-034
Certain Kenworth L770 and Peterbilt Model 520 chassis may encounter a slight increase in effort in the right-hand steering shaft when turning the wheel.
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.
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.
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.