23504 Parking Brake May Fail – 2022-2024 International HV, International MV Ttrucks, & 2022-2023 IC Bus TC Commercial Buses

SEOCONTENT-START

SERVICE PROCEDURE
SUBJECT:
@~ O@O@
APR 18 2023
Compliance Dept
23504
APRIL, 2023
SAFETY RECALL
Stationary Variable Engine Speed Control /
Stationary PTO on certain 2022 thru 2024
International® HV™ and MV™ Series trucks built
01/08/2021 thru 02/10/2023; 2022 and 2023 IC Bus®
TC Series commercial buses built 03/30/2021 thru
06/10/2022 with feature code 12VXT (Engine Speed
Control; Electronic, Stationary, Variable Speed) or
12VXU (Engine Speed Control for PTO; Electronic,
Stationary Pre-Set, Two Speed Settings)
CUSTOMER LETTER
Print ready (PDF file) copy of the Customer Letter
DEFECT DESCRIPTION
On certain vehicles equipped with an automatic transmission, if the automatic
transmission is still in drive or reverse position and the stationary variable engine
speed control or stationary PTO switch is engaged, the engine RPM could ramp
up and may overcome parking brake hold capability, resulting in possible
unexpected vehicle movement. Unexpected movement of the vehicles from the
park position can increase the risk of property damage or personal injury.
MODELS INVOLVED
This safety recall involves certain 2022 thru 2024 International® HV™ and MV™
Series trucks built 01/08/2021 thru 02/10/2023; 2022 and 2023 IC Bus®TC
Series commercial buses built 03/30/2021 thru 06/10/2022 with feature code
12VXT (Engine Speed Control; Electronic, Stationary, Variable Speed) or 12VXU
(Engine Speed Control for PTO; Electronic, Stationary Pre-Set, Two Speed
Settings).
VEHICLE RECALL 23504
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 1
ELIGIBILITY
This procedure applies ONLY to vehicles marked in the International® Service
Portal8M with Safety Recall 23504. Also complete any other open campaigns
listed on the Service Portal at this time.
PARTS INFORMATION
There are no parts for this campaign.
TOOLS IN FORMATION
I
Part Number Tool Description ! Quantity
N/A EZ-Tech® I
i 1
N/A Cummins INSITE™ I ‘1 ‘
N/A Approved USB Communication Interface 1
PSC550CC Battery Charger 55 Amp 1
SERVICE PROCEDURE
WARNING! To prevent personal mJury and I or death, or damage to
property, park vehicle on hard flat surface, turn the engine off, set the
parking brake and install wheel chocks to prevent the vehicle from moving
in either direction.
WARNING! To prevent personal injury and I or death, always wear safe eye
protection when performing vehicle maintenance.
WARNING! To prevent personal injury and / or death, or damage to
property, keep flames or sparks away from vehicle and do not smoke while
servicing the vehicle’s batteries. Batteries expel explosive gases.
1. Bring vehicle into shop and park on flat surface.
2. Shift transmission to Park or Neutral and set parking brake.
3. Turn vehicle ignition to Key OFF position.
4. Install wheel chocks.
5. Connect battery charger I maintainer to vehicle battery.
6. Connect EZ-Tech• to vehicle with approved USB communication interface.
VEHICLE RECALL 23504
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 2
7. Turn ignition to Key ON position, Engine OFF.
8. Connect to Cummins INSITE™.
2 3
, __
■-NI-
•8JIW~ .,, __ ■ Olll_,.,., ____
_ …… ._…._._ -__-_ __ …. —- ….,… – -_.-.,._~-, -_ __
.. -S,-d
-~-=- …… -,”.M.-l,’. _.”…. ,°_ “
.. PIO:li>Md 1 0.- .. – ..,,,,,.oo,,-_n,,._- — ..,. ,PI,OoS!>M,d_40s._-
=- ..,, ,,,,oo,,__,o,._-
.. PIO Si>Md I 0.-
18AallllarJIIIIPMlll•L…,O-.il
6=.- e-o,o,-
■ C…PIO c=…- .ee,.-,.,o._…,.. .vn.._w. ,_ .,_,._ ,.
,er,o,–
•■ -PIO
•1■-1-1P1I-•O·- t8t,~.-~IJJI0 ··– illll_Y_SfN,IS-1•
Figure 1. Features and Parameters menu
1. Features and Parameters button
2. PTO menu
3. Maximum vehicle speed interlock/ value
4. Parking brake interlock type/ value
5. Transmission neutral interlock/ value
CCMYIM[-
-(- -[- -l-•100-
11011n.
IDt”-“” 11011-
,”o’°o”o”_”
1100-
-1r- – –.l,..-_
4
5
– 7t;!3t
9. Select Features and Parameters button (Figure 1, Item 1) from the menu
table on left side.
NOTE: PTO must be on ENABLE in order to modify parameters below it.
10. Scroll down to PTO menu (Figure 1, Item 2).
VEHICLE RECALL 23504
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 3
11. For the following PTO parameters, set as follows.
a) Parking Brake Interlock Type: ALL (Figure 1, Item 4).
b) Transmission Neutral Interlock ENABLE (Figure 1, Item 5).
c) Maximum Vehicle Speed: 2 mph (3.2 km/h) (Figure 1, Item 3).
0000477332
Figure 2. Features and Parameters
1. Send to ECM button
12. Select the Send to ECM button (Figure 2, Item 1) from the menu table at the
top.
13. Once send has completed, turn ignition to Key OFF position and wait 30
seconds.
14. Turn ignition to Key ON position, Engine OFF and verify parameter settings
have been saved.
15. With ignition still in Key ON position and Engine OFF, clear all DTCs.
16. Disconnect EZ-Tech®from vehicle.
17. Remove battery charger/ maintainer from vehicle battery.
18. Start engine, confirm parking brake is set, place transmission in drive or
reverse, and activate stationary variable engine speed control or stationary
PTO switch to verify there is no vehicle movement.
19. Place transmission in park or neutral.
20. Turn ignition to Key OFF position.
21. Remove wheel chocks.
END OF SERVICE PROCEDURE
VEHICLE RECALL 23504
~ 2023 Navistar, Inc. All rights reserved. AU marks are trademarks of their respective owners. 4
LABOR INFORMATION
Operation Number Description
A40-23504-1 Reset Parameters
CAMPAIGN IDENTIFICATION LABEL
Each vehicle corrected in accordance with this
campaign must be marked with a CTS-1075
Campaign Identification Label.
Complete the label and attach on a clean surface next
to the vehicle identification number (VIN) plate.
ADMINISTRATIVE / DEALER RESPONSIBILITIES
WARRANTY CLAIMS
Time
0.5 hrs.
COMPL.ElED
Service Location Code ,
Warranty claim expense is to be charged to Warranty. Claims are to be
submitted in the normal manner, making reference to Safety Recall 23504.
Section 7 of the Warranty Policy and Procedures Manual contains further
information related to the submission and processing of AFC / Recall claims.
As with all claim submissions, items acquired locally must be submitted in the
“Other Charges” tab. The cost of any bulk items (such as a bag of cable tie
straps, roll of wire, barrel of oil, or tube of silicone) should be prorated for the cost
of the individual pieces / amount used during each repair.
VEHICLE RECALL 23504
© 2023 Navistar, Inc. All rights reserved. AU marks are trademarks of their respective owners. 5
GROUP
GROUP – Enter n umber
NOUN – Leave b lank –
._ I
–
C (CAUSE) – Enter either 1. 2, 3. (See below)
1. Inspected
2 Inspected
3 Defective
(No repair required),
and repaired.
part from parts stock, –
arranty Code) Enter 40. –
I
WARRANTY – (W
TYPE PART – En
PAD – Enter tJC)
ter P for type part causing failure.
I
UNITED STATES AND POSSESSIONS
NOUN C WARR. TP PAD
I I I
The National Traffic and Motor Vehicle Safety Act, as amended, provides that
each vehicle that is subject to a vehicle recall campaign must be adequately
repaired within a reasonable time after the owner has tendered it for repair. A
failure to adequately repair within 60 days after a tender of a vehicle is prima
facie evidence of failure to repair within a reasonable time. If the condition is not
adequately repaired within 60 days, the owner may be entitled to replacement
with an identical or reasonable equivalent vehicle at no charge, or to a refund of
the purchase price less a reasonable allowance for depreciation.
Dealers must correct all vehicles subject to this campaign at no charge to the
owner, regardless of mileage, age of vehicle, or ownership, from this time
forward.
Dealers should proceed immediately to make necessary correction to units in
inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your dealer location.
Dealers must make every effort to promptly schedule an appointment with each
owner to repair his or her vehicle as soon as possible. However, consistent with
the customer notification, dealers are expected to complete the repairs on the
mutually agreed upon service date.
Dealers involved in the recall process will be furnished a listing of owner names
and addresses to enable them to follow up with owners and have the vehicles
corrected. Use of this listing must be limited to this campaign because the list
may contain information obtained from state motor vehicle registration records,
and the use of such motor vehicle registration data for purposes other than this
campaign is a violation of law in several states.
VEHICLE RECALL 23504
© 2023 Navistar, Inc. All rights reserved. AU marks are trademarks of their respective owners. 6
CANADA
Dealers must correct all vehicles subject to this campaign at no charge to the
owner, regardless of mileage, age of vehicle, or ownership, from this time
forward.
Dealers should proceed immediately to make necessary correction to units in
inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your dealer location.
Dealers must make every effort to promptly schedule an appointment with each
owner to repair his or her vehicle as soon as possible. However, consistent with
the customer notification, dealers are expected to complete the repairs on the
mutually agreed upon service date.
Dealers involved in the recall process will be furnished a listing of owner names
and addresses to enable them to follow up with owners and have the vehicles
corrected. Use of this listing must be limited to this campaign because the list
may contain information obtained from state motor vehicle registration records,
and the use of such motor vehicle registration data for purposes other than this
campaign is a violation of law in several states.
EXPORT
Export Distributors should proceed immediately to make necessary correction to
units in inventory. All inventory vehicles subject to this recall campaign must be
corrected prior to sale, transfer or delivery. If vehicles have been sold or
transferred and you are in receipt of Customer Notification Letters and
Authorization for Recall Service cards for those vehicles, the transfer location or
customer must be notified immediately from your distributor location.
Export Distributors are to submit warranty claims in the usual manner making
reference to this recall number.
Export Distributors are expected to provide full cooperation and follow-up with
respect to this important subject matter. If you have any questions or need
further assistance, please contact the Regional Service Manager at your regional
office.
NAVISTAR, INC.
VEHICLE RECALL 23504
© 2023 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 7

**************************************************************************************************************

Navistar, Inc.
2701 Navistar Drive
Lisle, IL 60532 USA
navistar.com
IMPORTANT SAFETY RECALL 23504
NHTSA RECALL NO. 23V-120
This notice applies to your vehicle identified on the
enclosed card.
APRIL 2023
Dear INTERNATIONAL fl Customer,
This notice is sent to you in accordance with the requlrements of
the National Traffic and Motor Vehicle Safety Act.
Navistar has decided that a defect which relates to motor vehicle
safety exists in certain 2022 thru 2024 HV® and MV® series
trucks built 01/08/2021 thru 02/10/2023; 2022 and 2023 TC
commercial buses built 03/30/2021 thru 06/10/2022 with feature
code 12VXT (Engine Speed Control; Electronic, Stationary,
Variable Speed) or 12VXU (Engine Speed Control for PTO;
Electronic, Stationary Pre-Set, Two Speed Settings).
REASON FOR THIS RECALL
On certain trucks equipped with an automatic transmission, if the
automatic transmission is still in drive or reverse position and the
stationary variable engine speed control or stationary PTO
switch is engaged, the engine RPM will ramp up and may
overcome parking brake hold capability resulting in possible
unexpected vehicle movement.
RISK TO MOTOR VEHICLE SAFETY
Unexpected movement of the truck can increase the risk of
property damage or personal injury.
DEFECT REMEDY
Pubhc
(k’a]&OCb@CID
APR 2 4 2023
By: E.’1?:’!(f.~~~~!:-
A NAVISTAR COMPANY
IMPORTANTE CAMPANA DE REVISION DE
SEGURIDAD 23504
CAMPANA DE REVISION RE QUERIDA POR NHTSA N. 0
23V-120
Este aviso se aplica a su vehiculo, identificado en la
tarjeta adjunta.
ABRIL 2023
Estimado ctiente de INTERNATIONAL®,
Esta notificaci6n es enviada a usted de acuerdo con las
requisitos de la Ley Nacional de Transito y Seguridad de
Vehiculos de Motor.
Navistar ha decidido que existe un defecto relacionado con la
seguridad de los vehiculos de motor en ciertos camiones de
2022 a 2024 de las series HV® y MV® fabricados entre el
08/01/2021 y el 10/02/2023; Autobuses comerciales TC de
2022 y 2023 fabricados del 30/03/2021 al 10/06/2022 con
c6digo de caracteristica 12VXT (Control de velocidad del
motor; Electr6nico, Estacionario, Velocidad Variable) o 12VXU
(Control de Velocidad del Motor para la TDF; Electr6nico,
Preajuste Estacionario, dos ajustes de velocidad).
MOT/VO PARA ESTA REVISl6N
En ciertos camiones equipados con una transmisi6n
automatica, si la transmisi6n automatica todavia esta en
posici6n de marcha o en marcha atras y el control de
velocidad variable del motor estacionario o el interruptor de la
TDF estacionario esta conectado, las RPM del motor
aumentaran y pueden superar la capacidad de retenci6n del
freno de mano, lo que puede provocar el movimiento
inesperado del vehiculo.
RIESGO PARA LA SEGUR/DAD DE VEH/CULOS DE
MOTOR
El movimiento inesperado del camion puede aumentar el
riesgo de danos a la propiedad o lesiones personales.
ARREGLO DE DEFECTOS
The repair will involve updating the parameters in the Engine
Control Module that enables the PTO neutral interlock.
Authorized repair locations have software and instructions to
repair your vehicle. The repair will be performed free of charge
and take approximately 45 minutes to complete.
ACTIONS YOU SHOULD TAKE
Navistar’s records indicate that you own a vehicle involved in this
campa1gn. The vehicle is identified on the enclosed card.
If you own this vehicle, please schedule an appointment with
any International® dealer to have your vehicle repaired. You can
find your nearest dealer by using the deater locator at
https:/lwww.internattonaltrucks,co1_111dealer-locator or by calling
1-800-448-7825.
If you have already paid for repairs prior to this notice that
corrected the defect, you may be eligible for reimbursement of
certain repair expenses if they occurred 11/23/2021 thru
MM/DY/YR. Present your original repair paperwork and
proof of payment to any IC Bus dealer and your eligibility will
be reviewed. You may also submit a claim using the enclosed
Request for Reimbursement card.
If you are the lessor of this vehicle, please forward a copy of
this notice to the lessee as soon as possible.
If you do not own this vehicle, please fill out and return mail
the enclosed card so that you will not be contacted again about
this campaign.
IF YOU NEED FURTHER ASSISTANCE
If you believe that Navistar has failed to remedy the defect
without charge or within a reasonable time, please fo11ow the
procedure described in the Owner Asslstance Guide section in
your Owner’s Manual or call toll free 1-800-448-7825.
You may also submit a complaint to the Administrator, National
Highway Traffic Safety Administration, 1200 New Jersey Ave,
SE, Washtngton, DC 20590; or call the toll free Vehicle Safety
Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to
http://www.safercar.gov.
!!!!!!!!
la reparaci6n implicara la actualizaci6n de los parametros del
modulo de control del motor que permite el bloqueo del neutro
de la TDF. Los lugares de reparaci6n autorizados tienen el
software y las instrucciones para reparar su vehiculo. La
reparaci6n se realizara de forma gratuita y tomara
aproximadamente 45 minutos en compfetarse.
ACCIONES QUE USTED DEBE TOMAR
Los registros de Navistar indican que usted es duerio de un
vehiculo involucrado en esta camparia. El vehiculo se
identifica en la tarjeta adjunta.
Si usted es dueiio de este vehiculo, por favor, haga una cita
con cualquier distribuidor de International® para que reparen
su vehicu!o. Puede encontrar a su distribuidor mas cercano
mediante et localizador de distribuidores en
httos://www.internationaltrucks.com/dealer-locator o llamando
al telefono 1-800-448-7825.
Si ya ha pagado las reparaciones anteriores a esta
notificacion que corrigieron el defecto, es posible que
cumpla los requisitos para optar por un reembolso de
determinados gastos de reparaci6n si se produjeron del
23/11/2021 al MMfDY/YR. Presente la documentaci6n
original de la reparacion y el justificante de pago en
cualquier distribuidor de IC Bus y se revisara si cumple los
requisitos. Tambien puede presentar una reclamaci6n
utilizando la tarjeta de solicitud de reembolso adjunta.
Si usted es el arrendador de este vehiculo, favor de enviar
una copia de este av1so al arrendatario dentro de los
siguientes diez dias, para cumplir con fas regulaciones
federales.
Si usted no es dueiio de este vehrculo, por favor Ilene y
devuelva por correo la tarjeta adjunta a fin de que no
volvamos a ponernos en contacto con usted de nuevo acerca
de esta camparia.
SI USTED NECESITA MAS AYUDA
Si usted cree que Navistar no ha subsanado el defecto sin
cargo o dentro de un plazo razonable. por favor, siga el
procedimiento descrito en la secci6n Guia de Asistencia
Propietario en el Manual del Propletario o al numero gratuito
1-800-448-7825 llamada.
Tamblen puede presentar una queja al Administrador,
National Highway Traffic Safety Administration, 1200 New
Jersey Ave, SE, Washington, DC 20590; o llamar a la linea
gratuita Vehicle Safety Hotline al 1-888-327-4236 (TTY: 1-800-
424-9153); o ir a http://www.safercar.gov.
Navistar requests your prompt attention and patience regarding
the correction of this defect and apologizes for any
inconvenience this may cause you.
Navistar, Inc.
Navistar solicita su pronta atenci6n y su paciencia en cuanto a
la correcci6n de este defecto y se disculpa por cualquier
inconveniente que esto pueda causarle.
Navistar, Inc.
.

**************************************************************************************************************

Navistar, Inc.
2701 Navistar Drive
Lisle, IL 60532 USA
navistar.com
IMPORTANT SAFETY RECALL 23504
NHTSA RECALL NO. 23V-120
This notice applies to your vehicle Identified on the
enclosed card.
Dear INTERNATIONAL® Customer,
This notice applies to your vehicle identified on the
enclosed card. This notice is sent to you in accordance
with the requirements of the National Traffic and Motor
Vehicle Safety Act.
Navistar has decided that a defect which relates to motor
vehicle safety exists in certain 2022 thru 2024 HV® and
MV® series trucks built 01/08/2021 thru 02/10/2023; 2022
and 2023 TC commercial buses built 03/30/2021 thru
06/10/2022 with feature code 12VXT (Engine Speed
Control; Electronic, Stationary, Variable Speed) or 12VXU
{Engine Speed Control for PTO; Electronic, Stationary Preset,
Two Speed Settings).
REASON FOR THIS RECALL
On certain trucks equipped with an automatic transmission,
if the automatic transmission is still in drive or reverse
position and the stationary variable engine speed control or
stationary PTO switch is engaged, the engine RPM will
ramp up and may overcome parking brake hold capability
resulting in possible unexpected vehicle movement.
RISK TO MOTOR VEHICLE SAFETY
Unexpected movement of the truck can increase the risk of
property damage or personal injury.
DEFECT REMEDY
The repair will involve updating the parameters in the
Engine Control Module that enables the PTO neutral
interlock. Authorized repair locations have software and
instructions to repair your vehicle. The repair will be
performed free of charge and take approximately 45
minutes to complete.
ACTIONS YOU SHOULD TAKE
If you own this vehicle, please contact any
INTERNATIONAL® dealer or a Love’s Truck Tire Care or
Speedco* location to have your vehicle repaired at no cost
IN!~□ ~C@:@)
APR 2 4 2023
By: f ‘:.IJ.f.~!~1!!.’:.f!: .. A NAVISTAR COMPANY
APRIL 2023
to you. You can find your nearest service location by using
the service locator at
https://www.intemationaltrucks.com/dealer-locator or by
calling 1-800-448-7825 or https://www.loves.com .
*Love’s and Speedco locations in Texas cannot perform
warranty services.
If you have already paid for repairs prior to this notice
that corrected the defect, you may be eligible for
reimbursement of certain repair expenses if they occurred
02/23/2022 thru 05/04/2023. Present your original repair
paperwork and proof of payment to any
INTERNATIONAL«i dealer and your eligibility will be
reviewed. You may also submit a claim using the enclosed
Request for Reimbursement card.
If you are the lessor of this vehicle, please forward a
copy of this notice to the lessee within ten days to comply
with federal regulations.
If you do not own this vehicle, please fill out and return
mail the enclosed card so that you will not be contacted
again about this recall.
IF YOU NEED FURTHER ASSISTANCE
If you believe that Navistar has failed to remedy the defect
without charge or within a reasonable time, please follow
the procedure described in the Owner Assistance Guide
section in your Owner’s Manual or call toll free 1-800-448-
7825.
You may also submit a complaint to the Administrator,
National Highway Traffic Safety Administration, 1200 New
Jersey Ave, SE, Washington, DC 20590; or call the toll
free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-
424-9153); or go to http://www.safercar.gov.
Navistar requests your prompt attention and patience
regarding the correction of this defect and apologizes for
any inconvenience this may cause you.
Navistar, Inc.

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-120
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Navistar, Inc. FEB 23, 2023 NHTSA Recall No. : 23V-120 Manufacturer Recall No. : 23504 Manufacturer Information :
Manufacturer Name : Navistar, Inc.
Address : 2701 Navistar Drive
Lisle IL 60532 Company phone : 331-332-1590
Population :
Number of potentially involved : 27,972 Estimated percentage with defect : 100 %
Vehicle Information :
Vehicle 1 : 2022-2024 International HV
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : • The suspect population is identified by models built with Cummins 2021 EPA B6.7 or Cummins 2021 EPA L9 diesel engines, with certain Allison transmissions and either feature code 12VXT (Engine Speed Control; Electronic, Stationary, Variable Speed) or 12VXU (Engine Speed Control for Power Takeoff (PTO); Electronic, Stationary Pre-Set, Two Speed Settings).
• The inclusive dates of manufacturing were determined by when 12VXT or 12VXU programming did not have PTO neutral interlock enabled in the powertrain database through the date the programming was corrected in production. • The vehicles in the suspect population were built with feature code 12VXT or 12VXU during the inclusive dates of manufacture and any similar vehicles not subject to this notification were not.
There are 6,093 HV series trucks in the suspect population.
Production Dates : JAN 08, 2021 – FEB 08, 2023
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-120 Page 2 Vehicle 2 : 2022-2024 International MV
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : • The suspect population is identified by models built with Cummins 2021 EPA B6.7 or Cummins 2021 EPA L9 diesel engines, with certain Allison transmissions and either feature code 12VXT (Engine Speed Control; Electronic, Stationary, Variable Speed) or 12VXU (Engine Speed Control for Power Takeoff (PTO); Electronic, Stationary Pre-Set, Two Speed Settings).
• The inclusive dates of manufacturing were determined by when 12VXT or 12VXU programming did not have PTO neutral interlock enabled in the powertrain database through the date the programming was corrected in production. • The vehicles in the suspect population were built with feature code 12VXT or 12VXU during the inclusive dates of manufacture and any similar vehicles not subject to this notification were not.
There are 21,710 MV series trucks in the suspect population.
Production Dates : AUG 01, 2021 – FEB 10, 2023
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2022-2023 IC Bus TC commercial bus Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : • The suspect population is identified by models built with Cummins 2021 EPA B6.7 or Cummins 2021 EPA L9 diesel engines, with certain Allison transmissions and either feature code 12VXT (Engine Speed Control; Electronic, Stationary, Variable Speed) or 12VXU (Engine Speed Control for Power Takeoff (PTO); Electronic, Stationary Pre-Set, Two Speed Settings).
• The inclusive dates of manufacturing were determined by when 12VXT or 12VXU programming did not have PTO neutral interlock enabled in the powertrain database through the date the programming was corrected in production. • The vehicles in the suspect population were built with feature code 12VXT or 12VXU during the inclusive dates of manufacture and any similar vehicles not subject to this notification were not.
There are 169 TC commercial buses in the suspect population.
Production Dates : MAR 30, 2021 – JUN 10, 2022
VIN Range 1 : Begin : NR End : NR Not sequential The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-120 Page 3 Description of Defect :
Description of the Defect : When the parking brake is applied with the automatic transmission still in drive or reverse and the stationary PTO switch or stationary engine ramp switch is engaged by the operator, the engine RPM will ramp up. Because the neutral interlock is disabled, the vehicle is still in gear may overcome the parking brake possibly resulting in unexpected vehicle movement.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : Vehicle movement resulting from engine rpm ramp up with the automatic
transmission in gear and the parking brake applied could result in property damage or personal injury.
Description of the Cause : The 12VXT or 12VXU programming did not have PTO neutral interlock enabled in the powertrain database. Identification of Any Warning
that can Occur : None Involved Components : Component Name 1 : Engine Control Module Programming Component Description : Engine Programming Parameter settings Component Part Number : None Supplier Identification : Component Manufacturer
Name : NR Address : NR
NR
Country : NR Chronology :
• 01/26/2023 – Navistar Field Service receives communication from a customer that one vehicle had an incorrect parameter setting similar to previous recall 20V-810 (20510).
• 01/31/2023 – Navistar Field Service visits customer location and inspects vehicles. From those inspections it was determined the 12VXT or 12VXU programming with Cummins 2021 EPA L9 diesel engines did not have PTO neutral interlock enabled in the powertrain database. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-120
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
• 02/07/2023 – Navistar Compliance, Field Service and Engineering meet to determine potential root cause and the impact to International and IC bus products.
• 02/09/2023 – Navistar manufacturing quarantines vehicles with Cummins 2021 EPA L9 diesel engines at all assembly plants and updates the Power Train Data Base to enable the 12VXT or 12VXU PTO neutral interlock in the powertrain database.
• 02/10/2023 – After further investigation, Navistar determines the issue exists in vehicles built with Cummins 2021 EPA B6.7 diesel engines as well.
• 02/11/2023 – Navistar Manufacturing quarantines vehicles built with Cummins 2021 EPA B6.7 diesel engines at all assembly plants.
• 02/16/2023 – Navistar finalizes the suspect population and declares a Safety Recall.
Description of Remedy :
Description of Remedy Program : • The remedy will involve updating the parameters in the Cummins’
ECM for feature codes 12VXT or 12VXU that enables the PTO neutral interlock.
• Navistar’s plan for reimbursement of pre-notification remedies, on file with NHTSA and dated 05/06/2022, applies and reimbursement instructions will be included in the customer notification. How Remedy Component Differs from Recalled Component :
Identify How/When Recall Condition was Corrected in Production : The updated software parameter has the PTO neutral interlock enabled and the previous calibration did not.
02/09/2023 – Navistar manufacturing updates the Power Train Data Base to enable the 12VXT or 12VXU PTO neutral interlock in the powertrain database. Recall Schedule :
Description of Recall Schedule : It is estimated that the Customer and Dealer notification letters will be
mailed by 04/24/2023.
Planned Dealer Notification Date : APR 24, 2023 – APR 24, 2023
Planned Owner Notification Date : APR 24, 2023 – APR 24, 2023
* NR – Not Reported

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