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Service bulletin 20502

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10177765
Published by NHTSA2020-08-04
Manufacturer's number20502
Manufacturer's date2020-07-17
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This Emissions Recall applies to truck models that were built with 2019 and 2020 International 6.6 diesel engines; to improve Selective Catalytic Reduction (SCR) Diesel Exhaust Fluid (DEF) dosing system, which addresses the potential variability of Oxides of Nitrogen (NOx) emissions during various engine conditions, such as engine warm up. In addition, this recall will correct the Diesel Particulate Filter (DPF) frequent regeneration On Board Diagnostic (OBD) monitor and small quantity adjustment (SQA) diagnostic monitor to proper functionality.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
INTERNATIONAL CV2019 to 2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.