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Service bulletin C2640

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 id10227524
Published by NHTSA2022-12-12
Manufacturer's numberC2640
Manufacturer's date2022-11-03
NHTSA componentEQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

NHTSA's summary

This In-Shop campaign is being issued to address excessive output gear wear leading to the replacement of the intake air throttle. This In-Shop campaign authorizes certified repair locations to download and install a new ECM calibration. This In-Shop Campaign does not reimburse for any SRTs except those that are listed. It is recommended, but not required, that this Field Action be performed as part of another Cummins warrantable repair event to allow reimbursement for charges such as travel, troubleshooting, or access issues that are outside the scope of this document.

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

Equipment and accessories, Labels and manuals

Vehicles listed
CUMMINS X12

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