Recall 14V551 affects 19 2015 Mack Titan trucks for an engine-control software setting that can stall the engine. Repair is free at any franchised Mack dealer.
Mack is recalling 19 2015 Titan trucks because an incorrect engine control unit software setting can stall the engine. An engine stall increases the risk of a crash, and Mack dealers will correct the software free of charge.
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What's wrong?
The engine control unit on the 2015 Mack Titan is the computer that manages the diesel engine while the truck is running. It reads engine conditions and sends commands that keep fuel delivery and idle speed within the programmed range. The truck depends on that software staying set correctly so the engine keeps running as intended.
On affected Titan trucks, the software contains an incorrect parameter setting. A parameter is a saved instruction inside the engine control unit. Because that setting is wrong, the control unit can command the engine in a way that causes it to stall instead of continuing to run. The defect is a programming error, not a worn mechanical part.
There is no warning sign before failure. The truck can be operating normally, then the engine stalls without a dashboard warning or earlier change in how it runs.
Who's affected?
| 2015 Mack Titan | Diesel |
|---|---|
| Units affected | 19 |
| Field incidents | NHTSA has logged no field incidents to date. |
Not every 2015 Mack Titan truck is on the list. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
An engine stall can increase the risk of a crash because the truck loses power while moving. If your VIN is included, schedule the repair soon and treat any stall as a reason to stop safely and call the dealer. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2015 Mack Titan is included in this recall.
- Contact a franchised Mack dealer to schedule the free engine-control-unit reprogramming that corrects the software setting tied to engine-stall risk.
- Bring the recall notice if Mack sent one. If not, reference recall number 14V551 and Mack recall SC0382 when you call.
- Limit driving until the repair is complete, and pull over safely if the engine stalls.
What happens at the repair
At the dealer, a Mack technician reprograms the engine control unit to correct the software parameter that led to the stall risk. The recall repair is free and owners were already notified. If you've paid out of pocket for an engine control unit software repair tied to this issue before the recall notice, Mack reviews reimbursement requests case by case under its general reimbursement plan. Bring repair invoices or other documentation to the service desk so the claim can be reviewed.
| Reimbursement | Reimbursement available |
|---|
Timeline
| September 10, 2014 | NHTSA published the recall |
|---|---|
| September 10, 2014 | Dealer notification began |
| September 10, 2014 | Dealer notification ended |
| November 4, 2014 | Owner notification mailed |
| November 4, 2014 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 14V551?
Recall 14V551 covers 19 2015 Mack Titan trucks with an incorrect engine control unit software parameter that can cause the engine to stall. Mack dealers will reprogram the engine control unit for free under recall SC0382.
What should I do if my 2015 Mack Titan is on this recall?
Check your VIN to confirm your specific 2015 Mack Titan is included in recall 14V551. If it is, contact a franchised Mack dealer and ask for the engine control unit reprogramming under recall SC0382. The dealer repair is free.
Is the recall repair free?
Yes. Federal recall law requires Mack to repair the defect at no cost, and the recall remedy says Mack dealers will reprogram the engine control unit free of charge.
Is it safe to drive my 2015 Mack Titan before the repair?
An engine stall increases crash risk, so confirm your VIN and schedule the free dealer repair if your truck is included. The recall does not carry a do-not-drive order, but an included truck still needs the engine control unit reprogramming.
What if I bought my Mack Titan used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN, then give recall 14V551 or Mack recall SC0382 to the Mack dealer when you schedule service.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/14V551000 |
|---|---|
| Mack customer service | 1-800-528-6586 |
| NHTSA recall # | 14V551 |
| NHTSA recall # (full) | 14V551000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Defect / Noncompliance Notice (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 1, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →