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Service bulletin C2386

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 id10184066
Published by NHTSA2020-12-14
Manufacturer's numberC2386
Manufacturer's date2020-11-24
NHTSA componentEQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)

NHTSA's summary

This Campaign is being issued to replace valve springs on certain B Series engines.

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, Exhaust and emissions, EGR valve

Vehicles listed
CUMMINS ISB6.7

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