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Mack Anthem (An) Recall 23V792: Engine May Not Return to Idle, Risking Loss of Control

NHTSA campaign 23V792, reported November 22, 2023, 650 vehicles potentially affected.

What this recall means for you

Certain 2023-2024 Mack Anthem, Granite, LR, and Terrapro trucks may have an accelerator pedal position sensor that can become disconnected. If this happens, the engine may not return to idle within 2 seconds, so the vehicle does not meet Federal Motor Vehicle Safety Standard 124 for accelerator control systems.

An engine that does not return to idle quickly enough can cause a loss of vehicle control, which increases the risk of a crash.

Mack will replace the throttle pedal and update the vehicle software at no cost to you. Owner letters were mailed February 27, 2024. To arrange the repair or ask questions, contact Mack customer service at 1-800-866-1177, referencing recall SC0455, and check your VIN for any open recalls.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 23V792Mack Trucks, Inc.
Component
VEHICLE SPEED CONTROL
Problem
Mack Trucks, Inc. (Mack) is recalling certain 2023-2024 GR, AN, LR, and Terrapro vehicles. The engine may not return to idle within 2 seconds if the accelerator pedal position sensor becomes disconnected. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 124, "Accelerator Control Systems."
Risk
An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.
Remedy
Mack will replace the throttle pedal and update the vehicle software, free of charge. Owner letters were mailed February 27, 2024. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0455.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Affected vehicles

Mack Anthem (An)20232024
Mack Granite (Gr)20232024
Mack LR20232024
Mack Terrapro (Te)20232024