NHTSA ID Number: 10248329
Manufacturer Communication Number: 23KWJ
TSB/Document Date: 2024-01-05
Summary
Safety Recall 23KWJ: T280/T380/T480 Delayed Trailer Brake Release T280/T380/T480 Delayed Trailer Brake Release. Safety Recall Certain T280/T380/T480 chassis built with 2.1m Medium Duty End of Frame Trailer Connections and Tractor Protection Valves may not meet the standard trailer brake release timing requirements by 0.5 seconds. A delay in the trailer brake release may create momentary instability to the trailer and increase the risk of a crash.
Safety Recall 23KWJ: T280/T380/T480 Delayed Trailer
Brake Release
Author: John Ketkhounaroun
Red Field Title: Used in Recalls
12/20/2023
Title
(metadata)
Safety Recall 23KWJ: T280/T380/T480 Delayed Trailer Brake Release
Description
T280/T380/T480 Delayed Trailer Brake Release
Bulletin No.
23KWJ / 23V661 / 2023-524
Recall # / NHTSA # / TC #
Bulletin
Category
Vehicle (Recall)
Service
Subject
T280/T380/T480 Delayed Trailer Brake Release
Section
Choose an item.
What’s New
Abstract
Safety Recall – Interim Notification
Condition /
Complaint /
Introduction
126 T280/T380/480 chassis built with 2.1m Medium Duty End of Frame
Trailer Connections and Tractor Protection Valves may not meet trailer
brake release timing requirement of FMVSS 121. Trailer brake release
timing may exceed the standard by 0.5 seconds. A delay in the trailer brake
release may create momentary instability to the trailer and increase the risk
of a crash. Truck and Trailer brake application timing is not affected, nor is
brake performance affected.
Chassis
Affected /
Situation
126 chassis (118 US and 8 Canada) model year 2020-2024
T280/T380/T480 chassis built from 11/13/2019 through 09/08/2023 with
2.1m Medium Duty End of Frame Trailer Connections and Tractor
Protection Valves.
Certain T280/T380/T480 chassis built with 2.1m Medium Duty End of Frame
Trailer Connections and Tractor Protection Valves may not meet the
standard trailer brake release timing requirements by 0.5 seconds. A delay
in the trailer brake release may create momentary instability to the trailer
and increase the risk of a crash.
Page 1 of 6
Safety Recall 23KWJ: T280/T380/T480 Delayed Trailer
Brake Release
Must include models and vehicle model years to support monthly TREAD
report.
Service
Action /
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 23KWJ 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” next to the 23KWJ Campaign code prior
to performing this repair.
4. Follow the Repair Procedures linked in the “Procedure” section of
this bulletin.
Warranty
KENWORTH
WARRANTY STATEMENT
There is no time or mileage limit for this recall. Kenworth will pay for parts at
dealer net plus applicable mark-up and labor:
Determine the chassis configuration by finding the chassis number of the
vehicle you are repairing in the attached Chassis List.
•
1.2 hours to complete repairs per Configuration 1. Use Quick Claim
code 23KWJA.
•
2 hours to complete repairs per Configuration 2. Use Quick Claim
code 23KWJB.
•
2 hours to complete repairs per Configuration 3. Use Quick Claim
code 23KWJC.
•
For repair of progressive damage directly related this Safety Recall, file
a separate long form claim. A Quick Claim for standard labor must be
filed first.
•
File the claim within 14 days in accordance with Warranty Policy CA009.
Take-Off Parts Disposition: Destroy take-off parts 30 days after claim is
paid
Page 2 of 6
Safety Recall 23KWJ: T280/T380/T480 Delayed Trailer
Brake Release
PRWS CLAIM CODING
Campaign
Code:
23KWJ
Campaign
Type
Safety Recall
Claim
Category:
Truck
Repair Type
Proactive
Customer
Concern
Code
51
Restricted
Causal Code
30
Wrong size
Corrective
Action Code
12
Repair Recall
Responsibility Camp
Code:
Failure
Location
013-010-016
TRACTOR
PROTECTION
VALVE
Causal Part
G90-1287-004
Display in
SIR
Always Visible
SRT Code
Determine the chassis
configuration by finding
the chassis number of
the vehicle you are
repairing in the attached
Chassis List.
•
•
•
KW AutoPay Yes
Parts
Editable by
dealer?
B23-30A 1.2 Hours
Configuration 1
B23 30B 2.0 Hours
Configuration 2
B23 30C 2.0 Hours
Configuration 3
No
Parts are available from PACCAR Parts.
NOTE
Air Tube length varies depending on chassis configuration. Please
measure required length needed to perform repair prior to beginning
repairs.
Page 3 of 6
Safety Recall 23KWJ: T280/T380/T480 Delayed Trailer
Brake Release
Quantity
Configuration 1 Parts List
PPD Part
Description
Number
1
G38-1021-0608
1
G38-1023-0608
As
needed
per
chassis
(40-55 ft)
15
3270-0815-0100
1
N/A
1
N/A
1
N/A
Quantity
CT05317
FITTING-90
ELBOW MALE
NPT
FITTINGSTRAIGHT #6
MALE NPT TO #8
J2494
TUBING-AIR
BRAKE GREEN
1/2 OD 100FT OR
EQUIVALENT
TIE-CABLE 50LB
15.5" BLK OR
EQUIVALENT
SUPER LUBE 0.4
FL. OZ. RUBBER
LUBRICANT OR
EQUIVALENT
LOCTITE 401 0.1
FL. OZ. OR
EQUIVALENT
ELECTRICAL
TAPE OR
EQUIVALENT
Configuration 2 Parts List
PPD Part
Description
Number
2
G38-1021-0608
1
AP2335
1
G38-1021-0808
As
needed
3270-0813-0100
FITTING-90
ELBOW MALE
NPT
ADAPTERPIPE STL
PLUG SQH
FITTING-MALE
90DEG #8 NPT
TO #8 J2494
TUBINGAIRBRAKE
Stock
Location
(PDC /
DSP)
PDC
PDC
Cost
SEE
PN &
QTY
SEE
PN &
QTY
DSP (30
DAYS
LEAD
TIME)
SEE
PN &
QTY
PDC
SEE
PN &
QTY
$7.70
LOCALLY
SOURCED
LOCALLY
SOURCED
$9.62
LOCALLY
SOURCED
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Provides an extra margin of safety in extreme braking...
- Mix of polyglycol ethers ensures hot brake-system operation...
- Excellent for ABS
, disc and drum brake systems - Delivers braking power when needed by avoiding a spongy...
- Both wet and dry boiling points exceed the minimum...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 23KWJ
Replacement Service Bulletin Number:
MFR Communication Date: 2023-12-27
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, AIR
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations
- 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
Last update on 2026-06-30 / Affiliate links / Images from Amazon Product Advertising API
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.