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Service bulletin 31-002

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11035109
Published by NHTSA2026-07-21
Manufacturer's number31-002
Manufacturer's date2026-07-10
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

An installation guide is now available for temporary solar battery maintainers used on vehicles in dealer inventory. Using solar battery maintainers according to the attached guide can reduce instances of dead or undercharged batteries in stock vehicles at dealerships. Use of solar maintainers is considered a best practice for battery maintenance.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
KENWORTH W9902025, 2026, 2027
PETERBILT 5892024, 2025, 2026, 2027

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20264052026-08-21. Electrical
20263672026-07-27. Electrical
26V4850002026-07-27. ELECTRICAL SYSTEM:WIRING:POWER DISTRIBUTION MODULE/IPDM
25V5690002025-09-02. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
24V9150002024-12-09. ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
26PACD2026-09-29. Service campaign. "The PKC Group power distribution center (PDC) in certain vehicles may be contaminated with oil, which could result in a loss of power to the engine, antilock brake system, exterior lighting, windshield wipers, and/or defrost system. This issue may also result in non-compliance with multiple Federal Motor Vehicle Safety Standard (FMVSS) and Canadian Motor Vehicle Safety Standard (CMVSS) regulations, such as FMVSS/CMVSS 103 (windshield defrosting and defogging systems), 104 (windshield wiping and washing systems), and 108 (lamps, reflective devices, and associated equipment). PDC serial numbers of suspect trucks in the field will be inspected against the 26PACD Suspect Serial Number List in the Links section. If a match is identified, the PDC will be replaced."
E3282026-09-23. Service campaign. Certain chassis with CARB 2024 compliant MX-13 engines must have the PEU wiring harnesses updated. The original wiring and fuse are insufficient for electrical system operation and protection.
01-0942026-09-23. Service bulletin. [SmartAir / KIMS] A/C systems may shut down prematurely when voltage levels drop below a certain threshold.
P0012026-08-20. Service bulletin. Chassis list has been updated to include 10 chassis. The total chassis count is now 101.
43-0892026-07-22. Service bulletin. 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.
32-0092026-07-21. Service bulletin. The battery care, maintenance, and charging guidelines have been updated to include Absorbent Glass Mat (AGM) battery information. Dealers are responsible for maintaining inventory trucks and on-shelf batteries.
43-0802026-06-17. Service bulletin. "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."
R26012026-06-04. Service bulletin. Updated primary and/or secondary chassis modules for certain pre-production Kenworth chassis are now available for installation.
34-1012026-06-03. Service bulletin. Certain Peterbilt Model 589 chassis equipped with LED headlamps may need a relay and fuses for the integrated heaters to be functional.
02-1772026-06-03. Service bulletin. Troubleshooting procedures for 2.1m cab power windows are now available.