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Service bulletin 20901

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 id10174769
Published by NHTSA2020-05-06
Manufacturer's number20901
Manufacturer's date2020-04-01
NHTSA componentENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT

NHTSA's summary

To improve the Oxygen Sensor 2 (O2 sensor 2) On Board Diagnostics (OBD) monitor performance.

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, Equipment and accessories

Vehicles listed
IC BUS CE2019 to 2020

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