NHTSAELECTRICAL SYSTEM
Mack Trucks, Inc. - Delay Returning to Engine Idle/FMVSS 124
Published: June 23, 2025Recall ID: 25V427000Category: vehiclesCountry: US
Reason for Recall / Hazard
An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash.
Product Description & Identification
Mack Trucks, Inc. (Mack) is recalling certain 2024-2026 Mack MD vehicles. When the Controller Area Network (CAN) communications are interrupted, the throttle signal from the electro mobility control unit may retain the last known throttle setting, and the engine will not return to idle as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 124, "Accelerator Control Systems."
Affected Products
Delay Returning to Engine Idle/FMVSS 124
Additional Source Details
| Field | Value |
|---|---|
| Subject | Delay Returning to Engine Idle/FMVSS 124 |
| Nhtsa id | 25V427000 |
| Component | ELECTRICAL SYSTEM |
| Recall link › Url | https://www.nhtsa.gov/recalls?nhtsaId=25V427000 |
| Recall link › Description | Go to Recall |
| Recall type | Vehicle |
| Do not drive | No |
| Manufacturer | Mack Trucks, Inc. |
| Defect summary | Mack Trucks, Inc. (Mack) is recalling certain 2024-2026 Mack MD vehicles. When the Controller Area Network (CAN) communications are interrupted, the throttle signal from the electro mobility control unit may retain the last known throttle setting, and the engine will not return to idle as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 124, "Accelerator Control Systems." |
| Completion rate | 42.57 |
| Corrective action | Dealers will update the control unit software, free of charge. Owner notification letters were mailed August 14, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0481. |
| Consequence summary | An engine that does not return to idle quickly enough can cause a loss of vehicle control, increasing the risk of a crash. |
| Mfr campaign number | SC0481 |
| Potentially affected | 148 |
| Report received date | 2025-06-23T00:00:00.000 |
| Fire risk when parked | No |