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Service bulletin TSB200068-032420

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 id10173945
Published by NHTSA2020-04-20
Manufacturer's numberTSB200068-032420
Manufacturer's date2020-03-24
NHTSA componentENGINE; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of FC2989 becoming active during vehicle operation resulting in reduced engine power. If extended operation at speeds which result in maximum engine RPM are expected, it is recommended that the vehicle final gear ratio be changed to reduce engine RPM at those speeds. A local Cummins® Distributor can provide guidance to optimize engine economy, efficiency, and 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
CUMMINS L9N

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