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Service bulletin TSB200235-120420

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 id10185702
Published by NHTSA2021-01-25
Manufacturer's numberTSB200235-120420
Manufacturer's date2020-12-04
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

This Technical Service Bulletin describes the resolution of unexpected fault codes logged after engine control module (ECM) calibration code update.

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

Electrical system

Vehicles listed
CUMMINS ISLG
CUMMINS ISX12

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