Peterbilt 520, 579 +8 more: Engine and engine cooling — engine control module (ecu/ecm)

Affects Peterbilt 520, 579, 536, 537, 567, 389, 367, 548, 348, 220 · 2023 — about 2K vehicles.

The hazard

An unexpected engine stall can increase the risk of a crash.

What to do

Dealers will replace the ECM, free of charge. Owner notification letters are expected to be mailed October 16, 2022. Owners may contact Kenworth's customer service at 1-425-828-5888 and Peterbilt's customer service at 1-940-591-4220. PACCAR's number for this recall is 22KWG and 22PBG.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational