12/8/25, 3:03 PM

Federal Recall Bulletin

Safety Recall 25KWB: T180/T280/T380/T480 Exterior
Lighting Programming
Number

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25KWB / 25V041 / 2025-036

Supplier
Kenworth Truck Company

Description
Safety Recall 25KWB: T180/T280/T380/T480 Exterior Lighting Programming

Date
2/7/2025

What’s New
A new Recommended Repair has been added. It must be used if safety recall 25PACF is performed prior
to or at the same time as this repair since the 25PACF remedy also satisfies this safety recall.

Introduction
The Exterior Lighting Switch (ELS) in certain T180/T280/T380/T480 chassis may not function and can be
reset only by a key cycle. This issue may result in non-compliance with the following US Federal Motor
Vehicle Safety Standards (FMVSS) or Canadian Motor Vehicle Safety Standards (CMVSS) Regulations:
FMVSS 101 - Controls and Displays
FMVSS 108 - Lamps, Reflective Devices, and Associated Equipment
CMVSS 101 – Controls, Tell-tales, Indicators, and Sources of Illumination
CMVSS 108 - Lamps, Reflective Devices, and Associated Equipment.
If the ELS fails, the hazard lights and the backlight brightness adjustment may not function. As a result,
the lack of hazard lights may not alert other drivers. Failure to adjust the backlight brightness may distract
the operator or make it difficult to see critical safety information, which may increase the risk of a crash.
Warning Which Can Precede or Occur: None

Situation
2,805 (2,685 US and 120 Canada) Vehicle Model Year 2023-2026 T180 / T280 / T380 / T480 chassis

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built from 7/5/2022 through 12/20/2024.

Resolution
Safety Recall
Service all chassis affected that enter your dealership, even if the customer has no issue with the
chassis.
1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if
their chassis is on the list.
2. In Service Management, select Campaign 25KWB to add it to the case. If the unit is released back
into service without performing the repair, make sure to also release the Campaign in Service
Management
3. If you are not using Service Management to start repair orders, review SIR for “Complete” or "In
Process" next to the 25KWB campaign code prior to performing this repair.
4. Follow the procedures below to update software in Vehicle Electronic Control Unit (VECU3), Digital
Display (DD2), and Central Security Gateway (CSG2).

If 25PACF and 25KWB display Open on the same chassis, follow the 25PACF repair instructions to update
the software and, if necessary, replace specified hardware. Dealer must file both Recommended Repairs
25PACFA or B AND 25KWBB. 25KWBB will reimburse the dealer a time of 0.1 hours to close 25KWB,
which was resolved with 25PACF completion.
If 25KWB is Complete and 25PACF is Open, 25PACF repairs still need to be completed.

Federal Law
​It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or
noncompliance has been corrected.

Warranty
Starting on 02/07/2025, Kenworth will pay for parts at dealer net plus applicable mark-up and labor:
0.5 hours labor to update VECU, Digital Display, and CGS2 software. Use Recommended Repair
Code 25KWBA.
If 25PACF and 25KWB display Open on the same chassis, follow the 25PACF repair instructions to
update the software and, if necessary, replace specified hardware. Dealer must file both

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Recommended Repairs 25PACFA or B AND 25KWBB. 25KWBB will reimburse the dealer a time
of 0.1 hours to close 25KWB which was resolved with 25PACF completion.
File an additional claim for extraordinary circumstances. A quick claim for standard labor must be
filed first.
Issues arising from using prior DAVIE4 software versions will not be covered by warranty.
File the claim within 14 days in accordance with Warranty Policy CA009.
Take off parts disposition: N/A
PRWS CLAIM CODING
Campaign 25KWB Campaign
Code:
Type

Safety Recall

Claim
Truck
Category:

Repair Type

Proactive

Customer 225
Concern
Code

Causal Code 93

Corrective 12
Action
Code

Responsibility Camp
Code:

Failure
Location

003006003

Causal Part

Q21-1157-013013

Supplier
Code

N/A

SRT Code

B25-08A
0.5 hrs
Update
software for
VECU3, CSG2
and DD2 and
perform repair
verification per

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bulletin
procedure
B25-08B
0.1 hrs
Complete
safety recall
25KWB/25PBB
in SIR if
25PACF has
been
completed first

Procedure
Please follow your dealership's safety procedures and precautions to ensure the vehicle can be
safely repaired and maintained.
Read all steps before beginning.
If 25PACF and 25KWB display Open on the same chassis, follow the 25PACF repair instructions to
update the software and, if necessary, replace specified hardware. Dealer must file both Recommended
Repairs 25PACFA or B AND 25KWBB. 25KWBB will reimburse the dealer a time of 0.1 hours to close

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25KWB, which was resolved with 25PACF completion.
If 25KWB is Complete and 25PACF is Open, 25PACF repairs still need to be completed.
Ensure that DAVIE4 is up to date before connecting to a chassis for diagnostics or attempting to

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update any software.
1. Process a PVP file for the chassis
a. Open PACCAR Vehicle Pro.
b. Enter the chassis number.
c. Select SAVE AND CONTINUE.
d. Select SUBMIT.
2. Connect a battery charger during programming.
3. Update software for VECU3, CSG2, and DD using DAVIE4
a. Connect DAVIE4 using NEXIQ adapter and 9-pin diagnostic connector.
b. Connect ethernet cable.

c. Download updated software for VECU3, CGS2, and DD following the prompts in DAVIE4.
d. Program VECU3, CSG2 and DD with updated software.
4. Clear any faults generated during programming.
5. Disconnect DAVIE4 and battery charger.

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Parts
Software Only – No Parts Required.

Links
Chassis List
US Letter
Canada Letter
Authored by: JB3

Revision History
12/08/2025: Added Recommended Repair for completing the recall in SIR if safety recall 25PACF is
performed at the same time.
03/17/2025: Updated interim bulletin to final. Procedures and software are now available.

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