Mack Terrapro (TE) (2022-2027): Engine and engine cooling
Recall 26V139000 · Mar 11, 2026 · Mack Trucks, Inc.
775
vehicles affected
775
vehicles affected
Facts
- Recall number
- 26V139000
- Date
- Mar 11, 2026
- Maker
- Mack Trucks, Inc.
- Units affected
- 775
- Kind
- Vehicles
- Component
- Engine and engine cooling > Engine > Engine control module (ecu/ecm) > Software
- Model years
- 2022-2027
- Started by
- The maker
- Hazard
- Crash risk
What is wrong
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."
What can happen
Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.
The fix
Recall repairs are free of charge.
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.
Vehicles covered
1 model, 6 model years in all
| Make | Model | Model years |
|---|---|---|
| Mack | Terrapro (TE) | 2022-2027 |
Related pages
Questions and answers
Which vehicles are in recall 26V139000?
1 model: Mack Terrapro (TE) (2022-2027), about 775 vehicles in all.
What is the fix for recall 26V139000?
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.
What can happen?
Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.
A recall means the maker found a safety problem and offers a free fix; it does not mean every unit has the problem. Units affected are as reported by the company. Popular models sell more and so have more recalls and complaints. Official public data; texts are shortened. A dealer can tell whether a single vehicle still needs the repair.