NHTSA ID Number: 11020046
Manufacturer Communication Number: R2306 - PB
TSB/Document Date: 2025-07-02
Summary
All EMUX retrofit procedures updated to make it clear that the VECU3 must have software updated and vehicle mileage confirmed correct before updating the Digital Display. Parts and Procedure section also updated to include the Vehicle Emissions Control Information label ordering and installation instructions. This label is required for all chassis involved in R2306. Included additional reference to Cummins
bulletin C7014 in the procedure section for ordering emissions labels.
6/30/25, 12:40 PM
Vehicle Service Bulletin
R2306 - MY2024 Parts, Software, and Emissions Label Retrofit
6/30/2025
Edit
Clone
R2306
Subject
MY2024 Parts, Software and Emissons Label Retrofit
Whats New Abstract
All EMUX retrofit procedures updated to make it clear that the VECU3 must have software updated and vehicle mileage confirmed correct before updating
the Digital Display. Parts and Procedure section also updated to include the Vehicle Emissions Control Information label ordering and installation
instructions. This label is required for all chassis involved in R2306. Included additional reference to Cummins bulletin C7014 in the procedure section for
ordering emissions labels.
The emissions exemption for all PACCAR MX powered chassis involved in this retrofit expires on 10/31/2024. After that date, all PACCAR MX powered
chassis that have not received this Retrofit will be out of emissions compliance and illegal to operate.
Campaign start date: 09/17/2024
Revision
06/30/2025: All EMUX retrofit procedures updated to make it clear that the VECU3 must have software updated and vehicle mileage confirmed correct
before updating the Digital Display. Parts and Procedure section also updated to include the Vehicle Emissions Control Information label ordering and
installation instructions. This label is required for all chassis involved in R2306. Included additional reference to Cummins bulletin C7014 in the procedure
section for ordering emissions labels.
11/06/2024: TCS case requirements for EMUX software and PACCAR MX Pack 2 injector upfit have been removed. Software has been campaigned for both
processes, and software assistance is no longer required. All EMUX jumper harness retrofit procedures have been updated to include a software
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Vehicle Service Bulletin
verification step and procedures for 520, 567 car carrier, and 2.1m MD have been updated to include R&R procedures for VECU3. Parts Matrix has been
updated – VECU3 has been added to numerous chassis.
Condition
Certain pre-production chassis were built with pre-production parts, software, and exempt emissions labels.
The emissions exemption for all PACCAR MX powered chassis involved in this retrofit expires on 10/31/2024. After that date, all PACCAR MX powered
chassis that have not received this retrofit will be out of emissions compliance and illegal to operate.
Certain Cummins powered chassis listed on the “Retrofit Parts Matrix” may also require completion of Cummins retrofit C7014. Cummins powered chassis
may also be subject to emissions exemption expiration. Refer to engine emissions label to determine if an exemption expiration date applies.
Chassis equipped with PACCAR MX engines will also be eligible to receive redesigned fuel injectors to optimize engine performance.
Chassis Affected
54 (54 U.S. and 0 Canada) Model Year 2024 and 2025, 520, 537, 548, 567, 579, and 589 chassis manufactured with pre-production parts, software, and, in
some instances, an exempt, Engine Emissions Label.
Action
Campaign
Service all chassis affected that enter your dealership, even if the customer has no issue with the chassis.
Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list.
In Service Management, select Campaign R2306 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.
If you are not using Service Management to start repair orders, review SIR for “Complete” next to the R2306 campaign code prior to performing this
repair.
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Follow the appropriate procedures in Peterbilt ServiceNet and/or RMI to remove and replace any Emissions Retrofit parts listed for your specific
chassis in the Parts Matrix in the Links section below.
For chassis requiring the EMUX Jumper Harness Retrofit, refer to the appropriate, model-specific repair procedure in the Links section below.
All chassis require compliant Engine Emission labels, Clean Idle labels, and Vehicle Emission Control Information labels.
The emissions exemption for all PACCAR MX powered chassis involved in this retrofit expires on 10/31/2024.
NOTE
Be aware that the Vehicle Emissions Control
Information Labels have a significant lead
time that must be considered when
scheduling vehicles for service. There is a 2 to
4-week processing time for label requests.
Any Cummins powered chassis listed on the “Retrofit Parts Matrix” may also require completion of Cummins retrofit C7014. Cummins powered chassis
may also be subject to emissions exemption expiration. Refer to engine emissions label to determine if an exemption expiration date applies.
NOTE
If emissions exemptions are allowed to
expire, vehicle owners could receive civil
fines per regulation 40 CFR 19.4 up to
$5,761 per engine. In addition, owners may
be required to discontinue operation of the
vehicle until the retrofit is completed.
Warranty
Starting on 09/17/2024, there is no time or mileage limit to this campaign. The emissions exemption for affected vehicles expires on 10/31/2024. To avoid
possible fines, it must be completed immediately. Peterbilt will pay for parts and labels at dealer net plus applicable mark-up and labor:
For all repairs relating to the R2306 retrofit, file an editable claim using code R2306 and input all parts and labor used.
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Use editable SRT code B24-41A to report all labor hours used in the completion of this retrofit.
File the claim within 7 days in accordance with warranty policy.
NOTE
Take photos of the new PACCAR MX Engine
and PACCAR Clean Idle labels after
installation and attach photos to the
warranty claim.
Claims filed without these photos may be
denied.
Cummins powered vehicles will receive appropriate emissions labels (if necessary) via Cummins retrofit C7014. As such, photos of Cummins
emission labels are not required when filing a warranty claim through PACCAR.
Take-Off Parts Disposition: Destroy take-off parts 30 days after claim is paid.
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PRWS CLAIM CODING
ampaign
C
Campaign
R2306
Code:
Type:
Retrofit
Claim
Truck
Category:
Repair Type: Proactive
Customer
Concern 173
Code:
Causal Code: A1
orrective
C
Action
12
Code:
esponsibility
R
CAMP
Code:
003F ailure
006Location:
003
Causal Part:
Supplier
Code:
N/A
SRT Code:
Q21-1166001-003
B24-41A
Editable
SRT – Use
to report
all labor
hours used
in
completion
of all
aspects of
retrofit.
Parts
Make sure you have all necessary parts on hand prior to scheduling your customer for service.
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NOTE
e aware that the Vehicle Emissions Control
B
Information Labels have a significant lead
time that must be considered when
scheduling vehicles for service. There is a 2 to
4-week processing time for label requests.
Refer to the R2306 - PB Retrofit Parts Matrix to determine parts required for your chassis.
An Engine Emissions Label and Clean Idle Label are required for all PACCAR MX powered chassis.
A TCS365 case is required to order the appropriate emissions labels.
Labels may only be ordered after the software update has been verified.
See Procedures section for the TCS365 case creation guides.
You must order a new “Vehicle Emissions Control Information” label (p/n S53-6198) that is updated to show MY24 compliance.
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Vehicle Emissions Control Information label ordering procedures:
Take pictures of all parts replaced on the chassis.
These must be submitted with the Aftermarket Change Request.
Login to PACCAR.net.
Open the following link: Aftermarket Change Request.
For instructions on how to submit a GHG Aftermarket Change Request, refer to the GHG Aftermarket Change Request User Guide.pdf.
Be sure to specify in the submission that the vehicle is a MY24 Pilot Vehicle that is being upfit to a certified configuration for retrofit
R2306.
For the “Regulated Modification”, select “Label”, and then select “Convert Exempt Vehicle to Compliant Vehicle.”
The new label will be mailed to you UPS Red – Next Day Air.
Background
Certain pre-production vehicles were built with pre-production parts, software, and exempt engine emissions labels installed.
The emissions exemption for all PACCAR MX powered chassis involved in this retrofit expires on 10/31/2024. After that date, all PACCAR MX powered
chassis that have not received this retrofit will be out of emissions compliance and illegal to operate.
Any Cummins powered chassis listed on the “Retrofit Parts Matrix” may also require completion of Cummins retrofit C7014. Cummins powered chassis
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Vehicle Service Bulletin
may also be subject to emissions exemption expiration. Refer to engine emissions label to determine if an exemption expiration date applies.
Chassis equipped with PACCAR MX engines will also be eligible to receive redesigned fuel injectors to optimize engine performance.
Procedure
Please follow your dealership’s safety procedures and precautions to ensure the vehicle can be safely repaired and maintained.
PRE-PRODUCTION PARTS RETROFIT
Refer to the R2306 - PB Retrofit Parts Matrix to determine parts required for your chassis.
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Refer to appropriate documentation in RMI and Peterbilt ServiceNet for repair procedures relating to parts requiring upfit on your chassis.
PACCAR MX FUEL INJECTOR UPGRADE
CAUTION
When upfitting a chassis with upgraded fuel
injectors (2426855PE and 2426856PE) all 6
injectors must be replaced, and the PCI
software must be updated for the injectors in
the same service event.
Software/injector mismatch can cause severe
engine and aftertreatment damage.
NOTE
All chassis involved with Retrofit R2306 that
are equipped with a PACCAR MX engine have
already had software campaigned that is
compatible with the upgraded fuel injectors
(2426855PE and 2426856PE). You do not
need to open a TCS365 case for upgraded
fuel injector software assistance.
1. Reference RMI for injector R&R procedures.
Do not use fuel injector part numbers in RMI!
Only use the following 2 part numbers:
2426855PE (MX-11)
2426856PE (MX-13)
All 6 injectors must be replaced with the upgraded injectors.
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The Retrofit Parts Matrix does not include all parts necessary to complete the fuel injector upfit. Refer to RMI for a comprehensive list
of parts.
2. Software update:
Connect to PACCAR Vehicle Pro (PVP)
Enter chassis #.
Click SAVE AND SUBMIT in PVP for the chassis.
Connect DAVIE4 to 9-pin diagnostic connector.
Retrieve software for PCI-2.
Update PCI-2 software.
EMUX JUMPER HARNESS RETROFIT
1. Reference the R2306 - PB Retrofit Parts Matrix to determine if the EMUX jumper harness retrofit is required.
CAUTION
You must perform repair steps in the exact
order they are listed in the procedure
document! Failure to do so may result in the
inability to program the CSG2 and/or Digital
Display.
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CAUTION
AVIE4 MUST be updated to version 24.13 or
D
later before attempting to perform software
updates relating to this EMUX jumper
harness retrofit!
2. Reference EMUX jumper harness retrofit procedure appropriate to the truck model you are working on in the Links section below.
EMISSIONS LABEL ORDERING AND INSTALLATION
1. All necessary parts retrofits and software updates must be complete prior to ordering emissions labels.
2. Vehicle Emission Control Information (VECI) label:
This label must be ordered prior to the Engine Emission and Clean Idle labels.
Be sure to order a new VECI label following the instructions in the Parts section.
Be aware of the 2-4 weeks processing time.All chassis require a new VECI label.
All chassis require a new VECI label.
Remove the old VECI label form the driver's door jamb and replace it with the new label.
Take a picture of the new label as it is installed and attach the picture to the warranty claim.
(PACCAR MX ONLY)
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1. Refer to “PACCAR MX Emissions Label Ordering and Installation” procedure document in Links section below.
(CUMMINS ENGINE ONLY)
1. Refer to Cummins bulletin C7014 for information on Engine Data Plate and Clean Idle label replacement.
2. Apply the new Engine Emissions label and Clean Idle label if required.
Take photos of new labels after installation and attach photos to warranty claim.
NOTE
E ngine Emissions Labels, VECI labels, and
Clean Idle Labels are chassis specific. It is the
dealer’s responsibility to attach the correct
labels to each chassis. Mismatched labels can
result in regulatory fines.
Attachments
CHASSIS LIST, PARTS MATRIX, AND CUSTOMER LETTER
R2306 - PB Chassis List
R2306 - PB Retrofit Parts Matrix
R2306 - PB Customer Letter
EMUX JUMPER HARNESS RETROFIT PROCEDURES
(ALL 4 PROCEDURES UPDATED 06/30/25)
R2306 - PB 2.1m HD EMUX Jumper Harness Retrofit Procedure
R2306 - PB 2.1m MD EMUX Jumper Harness Retrofit Procedure
R2306 - PB 567 Car Carrier EMUX Jumper Harness Retrofit Procedure
R2306 - PB 520 EMUX Jumper Harness Retrofit Procedure
EMISSIONS LABEL ORDERING AND INSTALLATION PROCEDURE
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R2306 - PACCAR MX Emissions Label Ordering and Installation Procedures
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TSB/Document ID: R2306 - PB
Replacement Service Bulletin Number:
MFR Communication Date: 2025-07-01
MFR Internal Campaign ID/Software Version: R2306 - PB
Communication Type: Service Bulletin/Repair Instructions
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