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Service bulletin TSB210187

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 id10233013
Published by NHTSA2023-03-20
Manufacturer's numberTSB210187
Manufacturer's date2023-02-15
NHTSA componentFUEL SYSTEM, DIESEL; FUEL SYSTEM, GASOLINE

NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of Fault codes 3868, 4572 and 4677 Caused by Diesel Exhaust Fluid (DEF) Header Malfunction. A new ECM calibration codes are being made available that allows the engineto operate normally without engine torque and vehicle speed limits until a DEF header is available for final repair. This is an update to a previously submitted communication.

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

Fuel system

Vehicles listed
CUMMINS B
CUMMINS ISB
CUMMINS ISL 9
CUMMINS ISX
CUMMINS L GAS PLUS

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