Recall 20V199 covers 460,515 2008-2020 Peterbilt trucks with NAMUX software for an ABS warning-light failure. Repair is free at any franchised Peterbilt dealer.
Peterbilt is recalling 460,515 2008-2020 Peterbilt and Kenworth trucks, including the 330 and T680, because NAMUX software can leave the ABS warning light off after the ABS controller loses battery or ignition power. If a driver keeps operating the truck without working ABS, crash risk increases; Peterbilt dealers will complete the free repair.
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What's wrong?
The ABS and ESC warning lamps on these 2008-2020 Peterbilt trucks are supposed to tell the driver when the anti-lock brake system or electronic stability control has lost power or stopped working correctly. ABS helps keep the wheels from locking during hard braking. ESC helps the truck maintain stability when the system detects a loss of control.
The fault is in the NAMUX software that reads voltage from the ABS or ESC controller through the cab controller. The software uses a 25% voltage threshold to decide when the warning lamp should turn on. If the ABS or ESC controller loses battery or ignition power, such as from a blown fuse, the voltage reading can stay above that threshold. The dash warning lamp then fails to alert the driver that ABS or ESC power is gone.
Owners should not expect a clear ABS or ESC lamp every time this failure occurs. On some truck configurations, other warning lamps, such as traction control or check engine, appear on the dash and point to a vehicle issue.
Who's affected?
Spans Peterbilt and Kenworth truck models from 2008-2020, with electronic stability control and ABS warning-light scope listed separately.
| 2012 Peterbilt 330 | anti-lock brake system (ABS) |
|---|---|
| 2009 Peterbilt 330 | Electronic stability control (esc) |
| 2009 Peterbilt 330 | anti-lock brake system (ABS) |
| 2014 Peterbilt 330 | Electronic stability control (esc) |
| 2014 Peterbilt 330 | anti-lock brake system (ABS) |
| 2019 Peterbilt 330 | Electronic stability control (esc) |
| 2019 Peterbilt 330 | anti-lock brake system (ABS) |
| 2017 Peterbilt 330 | Electronic stability control (esc) |
| 2017 Peterbilt 330 | anti-lock brake system (ABS) |
| 2016 Peterbilt 330 | Electronic stability control (esc) |
| 2016 Peterbilt 330 | anti-lock brake system (ABS) |
| 2015 Peterbilt 330 | Electronic stability control (esc) |
| 2015 Peterbilt 330 | anti-lock brake system (ABS) |
| 2012 Peterbilt 330 | Electronic stability control (esc) |
| Units affected | 460,515 |
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?
If ABS is not functioning and the driver does not realize it, braking behavior can change and crash risk increases. Treat traction control, check engine, or other unexpected warning lamps as a reason to schedule service soon and drive cautiously until the software update is complete. Repair is free at any franchised Peterbilt dealer.
What should I do?
- Check your VIN to confirm your 2008-2020 Peterbilt or Kenworth truck is included in this recall.
- Contact a franchised Peterbilt dealer to schedule the free NAMUX software update in the cab control module, which fixes the ABS warning-light failure.
- Bring the recall notice if PACCAR mailed one. If not, reference recall number 20V199 when you call.
- Ask the dealer whether the truck needs inspection before normal service if the ABS warning light has not been working.
- Drive with extra following distance until the software update is complete, since the ABS warning light can fail to warn you when ABS is not working.
What happens at the repair
At the dealer, a Peterbilt technician updates the NAMUX software inside the cab control module so the ABS warning light can alert the driver if the ABS controller loses battery or ignition power. The recall repair is available, and the software update is free. Parts and labor are covered under the recall. PACCAR has a general reimbursement plan on file. If you paid out of pocket for a related NAMUX software repair before the recall work, ask the service desk or PACCAR customer service what documentation is needed to claim reimbursement.
| Reimbursement | Reimbursement available |
|---|
Timeline
| April 6, 2020 | NHTSA published the recall |
|---|---|
| May 26, 2020 | Owner notification mailed |
| June 4, 2020 | Dealer notification began |
| June 4, 2020 | Dealer notification ended |
| June 5, 2020 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 20V199?
Recall 20V199 covers 460,515 2008-2020 Peterbilt trucks equipped with NAMUX software. If ABS loses battery or ignition power to the controller, the ABS warning light can fail to alert the driver. Dealers will update the NAMUX software in the cab control module for free.
What should I do if my 2008-2020 Peterbilt truck is on this recall?
Check your VIN to confirm your specific truck is included in recall 20V199. If it is, contact a franchised Peterbilt dealer to schedule the NAMUX software update in the cab control module. Reference recall number 20V199 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and PACCAR says dealers will update the NAMUX software in the cab control module free of charge. Parts and labor are covered at a franchised Peterbilt dealer.
What is the safety risk?
The safety risk is driving without working ABS and without a dash warning light to alert the driver. If the driver unknowingly operates the truck without ABS functioning, NHTSA says the crash risk increases. The free dealer repair updates the NAMUX software that controls the warning-light behavior.
What if I bought this Peterbilt truck used?
The free recall repair still applies. Federal recall law follows the vehicle, not the first owner. Check your VIN to confirm whether your exact truck is included, then call a franchised Peterbilt dealer and reference recall number 20V199 when you schedule the software update.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/20V199000 |
|---|---|
| Peterbilt customer service | 1-425-828-5888 |
| NHTSA recall # | 20V199 |
| NHTSA recall # (full) | 20V199000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →