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Campaign 11V380 Posted July 21, 2011 211 units

2008, 2010, 2011, 2012 Kenworth Recall 11V380: Fast Idle

RN
Reviewed by the RecallNotify editorial team
Published June 2, 2026

Recall 11V380 covers 211 2008, 2010, 2011, 2012 Kenworth trucks for fast-idle software that triggers unexpected acceleration. Free dealer software update.

Kenworth recall 11V380 covers 211 trucks from 2008, 2010, 2011, and 2012, including the T700, T800, and T660, with PACCAR MX engines and certain automatic transmissions. When fast idle is engaged with the transmission in gear, the truck can unexpectedly accelerate, override the parking brake, and raise the risk of a crash, property damage, or injury; the dealer repair will be free once available.

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What's wrong?

The fast idle control software on the affected Kenworth trucks is supposed to manage engine speed while the truck is parked or otherwise held safely. Fast idle raises engine speed for work needs such as warmup or powering equipment, and the transmission controls decide whether that extra engine speed reaches the wheels.

On these trucks, the control logic allows the operator to activate fast idle while the transmission is still in gear. The recall covers trucks equipped with PACCAR MX engines and Eaton UltraShift DM or Allison automatic transmissions without auto-neutral. With the drivetrain still engaged, the truck is not isolated from the added engine speed the way it should be.

There is no warning sign before failure. The problem is in the control software, so an owner is not given a noise, leak, light, or pedal change before the fast idle command is accepted in gear.

Who's affected?

Covers 10 heavy truck model lines across the 2008, 2010, 2011, and 2012 model years, all tied to electrical system software.

2012 Kenworth T700 electrical system software
2011 Peterbilt 384 electrical system software
2008 Peterbilt 384 electrical system software
2011 Peterbilt 386 electrical system software
2010 Peterbilt 386 electrical system software
Units affected211

A matching year and model does not confirm inclusion. Check your VIN to confirm whether your specific truck is included in this recall.

What's the safety risk?

Unexpected acceleration while the transmission is in gear can overpower the parking brake, leading to a crash, vehicle or property damage, or injury to nearby pedestrians. If fast idle is active, confirm the transmission is not in gear and keep people clear before moving the truck. Repair will be free at any franchised Kenworth dealer once available.

What should I do?

  1. Check your VIN to confirm your 2008, 2010, 2011, 2012 Kenworth T700, 384, 386, 387, 587, 388, 365, 367, T800, or T660 is included in this recall.
  2. Contact a franchised Kenworth dealer and ask whether the free engine-software update is ready for your chassis.
  3. Reference recall number 11V380 when you call so the dealer can match the fast-idle software recall to your VIN.
  4. Bring the recall notice if Kenworth mailed one, plus any service records tied to the PACCAR MX engine software.
  5. Avoid using fast idle with the transmission in gear until the software update is complete.

What happens at the repair

The known repair is an engine software update for the affected chassis. Once the dealer repair is available, a Kenworth technician will update the engine software so the fast idle control cannot be used in the unsafe condition described by the recall. Parts and labor are covered under the recall. Before scheduling, give the service desk your VIN and ask whether the software update for campaign 11V380 is open for your specific vehicle.

Timeline

July 21, 2011 NHTSA published the recall
August 22, 2011 Owner notification mailed

Frequently asked questions

What is recall 11V380?

Recall 11V380 covers 211 Kenworth trucks with PACCAR MX engines and certain automatic transmissions where fast idle can be engaged while the transmission is in gear. The truck can unexpectedly accelerate, override the parking brake, and create crash or injury risk. Dealers update the engine software for free.

What should I do if my 2008, 2010, 2011, 2012 Kenworth T700, 384, 386, 387, 587, 388, 365, 367, T800, or T660 is on this recall?

Check your VIN to confirm your specific truck is included in recall 11V380. If it is, contact a franchised Kenworth dealer and ask for the engine software update. Reference recall number 11V380 when you call. The repair is free.

Is the recall repair free?

Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and the remedy says Kenworth dealers update the engine software for the affected chassis free of charge. The safety recall began on August 22, 2011.

What is the safety risk?

The risk is unexpected acceleration while the transmission is in gear. If fast idle is engaged in that state, the truck can override the parking brake and create crash risk, property damage risk, and injury risk for nearby pedestrians.

More information

NHTSA campaign pagenhtsa.gov/vehicle-recalls/11V380000
Kenworth customer service1-425-828-5440
NHTSA recall #11V380
NHTSA recall # (full)11V380000

Source documents

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 →