International LT, RH: Engine and engine cooling — software

Affects International LT, RH · 2021–2024 — about 770 vehicles.

The hazard

A vehicle that unexpectedly slows to idle speed on the roadway can increase the risk of a crash.

What to do

Dealers will update the ECM software, free of charge. Owner notification letters are expected to be mailed May 26, 2023. Owners may contact Navistar's customer service at 1-800-448-7825. Navistar's number for this recall is 23509.

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