BELLEVUE, Wash. – PACCAR Incorporated is recalling certain model year 2019-2022 Peterbilt and Kenworth wreckers and auto haulers which might have a defect in the “winch” brake system which could cause the service brake to disengage.

According to the National Highway Traffic Safety Administration Part 573 Safety Recall Report 21V-906, “The work brake (also known as winch brake) may unintentionally disengage the service brakes during winching operations, causing the vehicle to roll.”

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The 908-truck recall population is comprised of:

  • Kenworth T880, 2019-22
  • Kenworth W990, 2019-22
  • Peterbilt 389, 2019-22
  • Peterbilt 536, 2022
  • Peterbilt 537, 2022
  • Peterbilt 567, 2019-22
  • Peterbilt 579, 2019-22

NHTSA describes the problem as being a software issue within the system.

“Slight vehicle movement during winching causes the wheel speed sensor to detect vehicle movement. There is ‘noise’ in the wheel speed sensor at lower vehicle speeds, and erroneous values are communicated. These erroneous values exceed the speed interlock, causing the work brake to disengage.”

The remedy, as explained by NHTSA, will involve updating the software of the system.

Dealers and owners are scheduled to begin receiving notification of the recall Jan. 18, 2022.