NHTSAENGINE AND ENGI...
Mack Trucks, Inc. - ECU Software Error May Cause Unexpected Vehicle Movement/FMV...
Published: March 11, 2026Recall ID: 26V139000Category: vehiclesCountry: US
Reason for Recall / Hazard
Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.
Product Description & Identification
Mack Trucks, Inc. (Mack) is recalling certain 2022-2027 TerraPro trucks. The engine control unit (ECU) software may allow the engine to start when the transmission is not in Neutral. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 102, "Transmission Shift Lever Sequence, Starter Interlock, and Transmission Braking Effect."
Affected Products
ECU Software Error May Cause Unexpected Vehicle Movement/FMVSS 102
Additional Source Details
| Field | Value |
|---|---|
| Subject | ECU Software Error May Cause Unexpected Vehicle Movement/FMVSS 102 |
| Nhtsa id | 26V139000 |
| Component | ENGINE AND ENGINE COOLING |
| Recall link › Url | https://www.nhtsa.gov/recalls?nhtsaId=26V139000 |
| 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 2022-2027 TerraPro trucks. The engine control unit (ECU) software may allow the engine to start when the transmission is not in Neutral. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 102, "Transmission Shift Lever Sequence, Starter Interlock, and Transmission Braking Effect." |
| Completion rate | 30.84 |
| Corrective action | Dealers will update the ECU software, free of charge. Owner notification letters were mailed April 14, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0492. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov March 18, 2026. |
| Consequence summary | Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury. |
| Mfr campaign number | SC0492 |
| Potentially affected | 775 |
| Report received date | 2026-03-11T00:00:00.000 |
| Fire risk when parked | No |