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Service bulletin TSB210272-121020

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 id10206509
Published by NHTSA2022-01-18
Manufacturer's numberTSB210272-121020
Manufacturer's date2021-12-10
NHTSA componentELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)

NHTSA's summary

This Technical Service Bulletin describes the process to re-enable Fault Code 6637 after an Engine Control Module (ECM) Calibration Code Update. This Fault Code was previously disabled.

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, Engine, Engine control module

Vehicles listed
CUMMINS ISX12

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