Recall 13V641 affects 35 2014 Mack Pinnacle (Cxu) tractors with incorrectly wired over-speed protection. Repair is free at any franchised Mack dealer.
Mack is recalling 35 2014 Pinnacle (Cxu) tractor trailers under recall 13V641 because the automatic over-speed protection system was wired incorrectly and will not work as designed. If combustible vapors enter the air intake, the engine can overspeed and suffer catastrophic failure or catch fire; the dealer repair will be free once available.
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What's wrong?
The automatic over-speed protection system on the 2014 Mack Pinnacle (Cxu) is a safety control for the diesel engine. Its job is to watch engine speed and shut the engine down if the engine revs excessively. That shutdown is meant to protect the engine and drivetrain when speed rises beyond the intended operating range.
On affected Mack tractor trailers, the concern is incorrect wiring in that protection system. With the wiring wrong, the system does not operate as designed when the engine reaches an excessive speed condition. The engine can keep running instead of shutting down as the protection system is supposed to do.
There is no warning sign before failure. The problem is in the way the protection system is wired, so an owner or driver should treat VIN inclusion as the deciding factor, not engine feel during a trip.
Who's affected?
| 2014 Mack Pinnacle (Cxu) | Diesel |
|---|---|
| Units affected | 35 |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
Combustible vapors entering the air intake can leave the engine without effective speed control. That can cause excessive engine speed, catastrophic engine failure, or an engine fire. If the truck races or feels abnormal, stop in a safe place and call a Mack dealer before continuing. Repair will be free at any franchised Mack dealer once available.
What should I do?
- Check your VIN to confirm your 2014 Mack Pinnacle (Cxu) is included in this recall.
- Review Mack's owner notice mailed February 20, 2014, and keep it with your service records.
- Contact a franchised Mack dealer and ask for the free wiring correction that restores the automatic over-speed protection system.
- Reference recall number 13V641 and Mack recall SC0374 when you call.
- Avoid operating the truck around combustible vapors until the wiring correction is complete.
What happens at the repair
Mack's remedy is to correct the wiring for the automatic over-speed protection system. Once the dealer repair is available, a Mack technician will inspect the system wiring and correct the wiring so the engine over-speed protection system operates as designed. Parts and labor are covered under the recall. The recall began on February 20, 2014, but this section does not list a current available repair status, so confirm repair availability with a Mack dealer before bringing the truck in.
Timeline
| December 20, 2013 | NHTSA published the recall |
|---|---|
| February 20, 2014 | Owner notification mailed |
Frequently asked questions
What is recall 13V641?
Recall 13V641 covers 35 2014 Mack Pinnacle (Cxu) tractor trailers with an incorrectly wired automatic over-speed protection system. The system is meant to monitor diesel engine speed and shut the engine down during excessive revving. Mack dealers correct the wiring for free.
What should I do if my 2014 Mack Pinnacle (Cxu) is on this recall?
Check your VIN to confirm your specific tractor is included in recall 13V641. If it is, contact a franchised Mack dealer and ask for the system wiring correction under Mack recall SC0374. The dealer repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and Mack's remedy says dealers correct the system wiring free of charge. The recall repair is handled through a franchised Mack dealer.
What is the safety risk in recall 13V641?
The safety risk is excessive diesel engine speed leading to catastrophic engine failure or engine fire. Mack reported that airborne hydrocarbons entering through the air intake can trigger uncontrolled engine speed when the protection system is wired incorrectly.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/13V641000 |
|---|---|
| Mack customer service | 1-336-393-2000 |
| NHTSA recall # | 13V641 |
| NHTSA recall # (full) | 13V641000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (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 2, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →