Vehicle speed controlRecall 23V-792 · Mack vehicles
Mack Trucks, Inc. recall 23V-792 covers 650 Mack vehicles for a vehicle speed control problem, reported to NHTSA on November 22, 2023. The manufacturer's latest report (2025 Q4) shows 69% of affected vehicles repaired.
Source: NHTSA recall 23V792000 and manufacturer quarterly reports. Started by the manufacturer.
The 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."
The risk
An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.
The fix
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.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
How fast cars are being fixed
69%repaired
Share of affected vehicles repaired in each quarterly report the manufacturer filed with NHTSA.