Navistar 2021 International LT Trucks: Engine Slowing Risk
Navistar recalls 2021-2024 International LT trucks with potential engine slowing risk. Owners must update ECM software to prevent unexpected slowdowns.
Use caution until it’s fixed
A vehicle that unexpectedly slows to idle speed on the roadway can increase the risk of a crash.
Contact the company
What happened, in plain English
Navistar is recalling certain 2021-2024 International LT trucks because their engine control module might unexpectedly slow the vehicle to idle speed while driving, increasing crash risk. This could happen during normal driving without warning. Read more at govinfonow.com/recall/80488-navistar-2021-international-lt-trucks-engine-slowing-risk.
Source Summary by GovInfoNow · govinfonow.com/recall/80488-navistar-2021-international-lt-trucks-engine-slowing-risk · Updated October 4, 2026 · Official notice: NHTSA #23V220000
Cite this page
“Navistar 2021 International LT Trucks: Engine Slowing Risk.” GovInfoNow, updated October 4, 2026. https://govinfonow.com/recall/80488-navistar-2021-international-lt-trucks-engine-slowing-risk. Based on NHTSA recall #23V220000 (https://www.nhtsa.gov/recalls?nhtsaId=23V220000).
Why it’s dangerous
The engine control module (ECM) may not respond properly to the throttle pedal, causing the vehicle to slow unexpectedly to idle speed while driving. This can happen without warning and may increase crash risk during normal operation.
Who’s affected
Owners of 2021-2024 International LT and RH trucks are affected. Drivers using these vehicles without the software update are most at risk.
How to tell if you have this one
Check if your truck is a 2021-2024 International LT or RH model. The recall applies to vehicles with the specific engine control module that may be unresponsive to throttle pedal application.
- Brand
Navistar- Category
Vehicle
What to do — step by step
Update ECM Software
Dealers will update the engine control module software for free. Contact Navistar customer service at 1-800-448-7825 for assistance.
What NHTSA says 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.
Contact Navistar
We’ve drafted a message you can send Navistar to request your refund or repair — edit it as you like.
Subject: Recall 23V220000 — Navistar 2021 International LT Trucks: Engine Slowing Risk Hello, I own a Navistar 2021 International LT Trucks: Engine Slowing Risk that is covered by recall 23V220000 from Navistar. The official recall notice states: 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. I’m writing to arrange the remedy described in the recall (a refund, repair, or replacement as applicable). Could you please tell me the next steps to resolve this? Thank you.
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Where this comes from
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
- Official source: NHTSA Recall #23V220000 (March 30, 2023)
- Plain-language summary written by qwen3:4b on October 4, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
- GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.