SC0455 – Delay Returning to Engine Idle – 2023-2024 Mack GR, AN, LR, & Terrapro

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MACK TRUCKS
RECALL ALERT
© Mack Trucks, Inc. CONFIDENTIAL – For limited distribution only to circulation list above. This bulletin, and any information herein, is subject to change by Company without
notice. For the most current and accurate information, always refer to Trucks Dealer Portal for the electronic version of this document.
Description
The engine may not return to idle if the accelerator pedal position sensor becomes disconnected. An engine that doesn’t return to idle could cause a loss of control and increase the risk of a crash.
There have been no field reports, warranty claims or customer complaints associated with this issue.
The remedy for this recall is currently under development.
Model and Model Years Affected
• Certain 2023 and 2024 Anthem, Granite, LR and TerraPro model vehicles manufactured October 24, 2022, through October 27, 2023.
Vehicle Quantities
• 947 vehicles (851 US, 96 Canada)
Dealer Responsibilities
• The National Traffic and Motor Vehicle Safety Act and Canadian Motor Vehicle Safety Act require dealers to ensure that all new and used vehicles are free of safety defects and comply with all relevant safety standards at the time of delivery to the consumer.
• Dealers should make their personnel aware of the safety recall. In the event that a dealer has a vehicle included in the safety recall in their inventory to be sold, the condition must be corrected before releasing it to a customer.
Notification Release Schedule
• Vehicle list will be posted on the Trucks Dealer Portal November 27, 2023.
• Owner notification letters will be released on or before December 15, 2023.
• Repair Instruction will be released once they are available.
Contact
If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com.
Subject:
Safety Recall SC0455, Accelerator Position Sensor, Cummins Engine
Recall Number:
SRA-M455
Date:
November 27, 2023
Applicable Markets:
☒U.S. ☒Canada ☐ Export

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-792
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Mack Trucks, Inc.
Submission Date : NOV 22, 2023
NHTSA Recall No. : 23V-792
Manufacturer Recall No. : SC0455
Manufacturer Information :
Manufacturer Name : Mack Trucks, Inc.
Address : 2100 Mack Boulevard
PO Box M Allentown PA 18105-5000
Company phone : 610-709-2131
Population :
Number of potentially involved : 851
Estimated percentage with defect : 100 %
Vehicle Information :
Vehicle 1 : 2023-2024 Mack GR, GU, AN, LR, Terrapro
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style : OTHER
Power Train : DIESEL
Descriptive Information : The recall population is determined by vehicles built within the specified impacted
time frame. The start date is based on the introduction of a new pedal into production.
Production Dates : OCT 24, 2022 – NOV 20, 2023
VIN Range 1 : Begin : 1M2TE7GC7PM001541 End : 1M2LR7GC5RM002534 ✔ Not sequential
Description of Noncompliance :
Description of the
Noncompliance :
In the event that the accelerator position sensor ground wire becomes
disconnected, the default operating voltage range on the engine rationality
check timing for return to idle is non-compliant with FMVSS 124 S5.2 and S5.3.
FMVSS 1 : 124 – Accelerator control systems
FMVSS 2 : NR
Description of the Safety Risk : If the accelerator position sensor ground wire were to become disconnected,
the engine would operate out of compliant return to idle time target, where
there could be loss of control of the vehicle which could result in a risk of
crash. There have been no warranty claims, field or service reports reported
for this issue.
Description of the Cause : When Pin B is open circuit, the pedal defaults to a high state of 3.8V. This is
within the operating voltage of the engine and is read as 100% driver demand.
On the previously introduced pedal, the OC voltage was 5V. This is outside of
the operating range and is read as an error and does not cause 100% driver
demand.
Identification of Any Warning
that can Occur :
The driver may experience an increased delayed return to engine idle.
Part 573 Safety Recall Report 23V-792 Page 2
The information contained in this report was submitted pursuant to 49 CFR §573
Involved Components :
Component Name 1 : NR
Component Description : NR
Component Part Number : NR
Supplier Identification :
Component Manufacturer
Name : Mack Trucks
Address : 7825 National Service Rd
Greensboro North Carolina 27409-9667
Country : United States
Chronology :
October 26, 2023, Investigation opened by Engineering, as a result of a possible testing failure.
November 17, 2023, The Product Compliance Committee recommends that the issue be brought to the Product
Safety Committee as a potential product safety defect/regulatory non-compliance.
November 20, 2023, The Product Safety Committee meets and decides that a product safety defect/regulatory
non-compliance exists.
November 22, 2023, Mack submits the 573 DIR and advises that a voluntary safety recall will be performed.
Description of Remedy :
Description of Remedy Program : As of filing date, November 22, 2023, the remedy has not been determined.
How Remedy Component Differs
from Recalled Component :
NR
Identify How/When Recall Condition
was Corrected in Production :
NR
Recall Schedule :
Part 573 Safety Recall Report 23V-792 Page 3
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Recall Schedule : Dealer notifications will begin on November 27, 2023, and owner
notifications will begin on or before January 21, 2024.
Planned Dealer Notification Date : NOV 27, 2023 – NOV 27, 2023
Planned Owner Notification Date : JAN 21, 2024 – JAN 21, 2024
* NR – Not Reported

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

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-792
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Mack Trucks, Inc.
Submission Date : NOV 27, 2023
NHTSA Recall No. : 23V-792
Manufacturer Recall No. : SC0455
Manufacturer Information :
Manufacturer Name : Mack Trucks, Inc.
Address : 2100 Mack Boulevard
PO Box M Allentown PA 18105-5000
Company phone : 610-709-2131
Population :
Number of potentially involved : 851
Estimated percentage with defect : 100 %
Vehicle Information :
Vehicle 1 : 2023-2024 Mack GR, AN, LR, Terrapro
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style : OTHER
Power Train : DIESEL
Descriptive Information : The recall population is determined by vehicles built within the specified impacted
time frame. The start date is based on the introduction of a new pedal into production.
Production Dates : OCT 24, 2022 – NOV 20, 2023
VIN Range 1 : Begin : 1M2TE7GC7PM001541 End : 1M2LR7GC5RM002534 ✔ Not sequential
Description of Noncompliance :
Description of the
Noncompliance :
In the event that the accelerator position sensor ground wire becomes
disconnected, the default operating voltage range on the engine rationality
check timing for return to idle is non-compliant with FMVSS 124 S5.2 and S5.3.
FMVSS 1 : 124 – Accelerator control systems
FMVSS 2 : NR
Description of the Safety Risk : If the accelerator position sensor ground wire were to become disconnected,
the engine would operate out of compliant return to idle time target, where
there could be loss of control of the vehicle which could result in a risk of
crash. There have been no warranty claims, field or service reports reported
for this issue.
Description of the Cause : When Pin B is open circuit, the pedal defaults to a high state of 3.8V. This is
within the operating voltage of the engine and is read as 100% driver demand.
On the previously introduced pedal, the OC voltage was 5V. This is outside of
the operating range and is read as an error and does not cause 100% driver
demand.
Identification of Any Warning
that can Occur :
The driver may experience an increased delayed return to engine idle.
Part 573 Safety Recall Report 23V-792 Page 2
The information contained in this report was submitted pursuant to 49 CFR §573
Involved Components :
Component Name 1 : NR
Component Description : NR
Component Part Number : NR
Supplier Identification :
Component Manufacturer
Name : Mack Trucks
Address : 7825 National Service Rd
Greensboro North Carolina 27409-9667
Country : United States
Chronology :
October 26, 2023, Investigation opened by Engineering, as a result of a possible testing failure.
November 17, 2023, The Product Compliance Committee recommends that the issue be brought to the Product
Safety Committee as a potential product safety defect/regulatory non-compliance.
November 20, 2023, The Product Safety Committee meets and decides that a product safety defect/regulatory
non-compliance exists.
November 22, 2023, Mack submits the 573 DIR and advises that a voluntary safety recall will be performed.
Description of Remedy :
Description of Remedy Program : As of filing date, November 22, 2023, the remedy has not been determined.
How Remedy Component Differs
from Recalled Component :
NR
Identify How/When Recall Condition
was Corrected in Production :
NR
Recall Schedule :
Part 573 Safety Recall Report 23V-792 Page 3
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Recall Schedule : Dealer notifications will begin on November 27, 2023, and owner
notifications will begin on or before January 21, 2024.
Planned Dealer Notification Date : NOV 27, 2023 – NOV 27, 2023
Planned Owner Notification Date : JAN 21, 2024 – JAN 21, 2024
* NR – Not Reported

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

MACK TRUCKS
RECALL ALERT
© Mack Trucks, Inc. CONFIDENTIAL – For limited distribution only to circulation list above. This bulletin, and any information herein, is subject to change by Company without
notice. For the most current and accurate information, always refer to Trucks Dealer Portal for the electronic version of this document.
Description The engine may not return to idle within the time period required by FMVSS 124 (2 seconds) if the accelerator pedal position sensor becomes disconnected. An engine that doesn’t return to idle could cause a loss of control and increase the risk of a crash.There have been no field reports, warranty claims or customer complaints associated with this issue. The remedy for this recall is currently under development. Model and Model Years Affected
•Certain 2023 and 2024 Anthem, Granite, LR and TerraPro model vehicles manufactured October 24,2022, through October 27, 2023.
Vehicle Quantities
•947 vehicles (851 US, 96 Canada)
Dealer Responsibilities
•The National Traffic and Motor Vehicle Safety Act and Canadian Motor Vehicle Safety Act requiredealers to ensure that all new and used vehicles are free of safety defects and comply with all relevantsafety standards at the time of delivery to the consumer.
•Dealers should make their personnel aware of the safety recall. In the event that a dealer has a vehicleincluded in the safety recall in their inventory to be sold, the condition must be corrected beforereleasing it to a customer.
Notification Release Schedule
•Vehicle list will be posted on the Trucks Dealer Portal November 27, 2023.
•Owner notification letters will be released on or before December 15, 2023.
•Repair Instruction will be released once they are available.
Contact
If you have questions or concerns about this recall, contact the Regulatory Affairs Department at vtna.regulatoryaffairs@volvo.com.
Subject:
Recall Number:
Date:
Safety Recall SC0455, Accelerator Position Sensor, Cummins Engine SRA-M455 November 29, 2023
Applicable Markets:
☒U.S. ☒Canada ☐ Export Revised Description 11-29-2023

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