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Service bulletin 46-029

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 id11036290
Published by NHTSA2026-08-20
Manufacturer's number46-029
Manufacturer's date2026-08-13
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

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.

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 T6802024, 2025, 2026
KENWORTH T8802024, 2025, 2026
PETERBILT 5202024, 2025, 2026
PETERBILT 5672024, 2025, 2026
PETERBILT 5792024, 2025, 2026

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

Recalls for the same vehicles and component
25V5690002025-09-02. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
25V1810002025-03-24. ELECTRICAL SYSTEM:PROPULSION SYSTEM
25V0410002025-01-29. EXTERIOR LIGHTING:HAZARD FLASHING WARNING LIGHTS:SWITCH; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE
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
32-0142026-09-29. Service bulletin. 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.
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.
P0032026-08-25. Service bulletin. The PB chassis list has been updated to include 1 chassis. The total chassis count is now 9.
P0032026-08-20. Service bulletin. "For Peterbilt: Chassis list has been updated to include 1 chassis. The total chassis count is now 7. For Kenworth: Chassis list has been updated to include 1 chassis. The total chassis count is now 8."
P0012026-08-20. Service bulletin. Chassis list has been updated to include 10 chassis. The total chassis count is now 101.
46-0202026-07-23. Service bulletin. Certain unaffected chassis have been removed from the chassis population.
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.
26PACB2026-07-20. Service campaign. "(KW): Certain Kenworth K270 and K370 Battery Electric Vehicle (BEV) chassis equipped with certain DANA cradle harnesses may intermittently lose electrical continuity at one or more C40 connector pins. This can occur without warning and cause loss of propulsion, increasing the risk of a crash. Certified BEV technicians will inspect the C40 connector and replace the cradle harness, if necessary. This safety recall defect is identical to 25KWD and applies to certain Canadian chassis added on 07/02/2026. (PB): Certain Peterbilt Model 220 Battery Electric Vehicle (BEV) chassis equipped with certain DANA cradle harnesses may intermittently lose electrical continuity at one or more C40 connector pins. This can occur without warning and cause loss of propulsion, increasing the risk of a crash. Certified BEV technicians will inspect the C40 connector and replace the cradle harness, if necessary. This safety recall defect is identical to 25PBD and applies to certain Canadian chassis added on 07/02/2026."
25KWD 25PBD2026-07-20. Service campaign. Additional US chassis have been added, along with additional Canadian chassis under identical safety recall 26PACB.