WenmarOpen by Wenmar Pro

Service bulletin TSB101120-111414

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 id10089264
Published by NHTSA2017-01-20
Manufacturer's numberTSB101120-111414
Manufacturer's date2014-11-20
NHTSA componentENGINE

NHTSA's summary

THIS TECHNICAL SERVICE BULLETIN DESCRIBES THE VERIFICATION AND RESOLUTION OF ENGINE SURGE, USUALLY WITH HIGH COUNTS OF FAULT CODES 1861 AND 2776. THE CAUSE IS FOUND TO BE CONTAMINATION OF THE AIR/FUEL MIXER AND PARTIAL OR COMPLETE BLOCKAGE OF THE MIXER'S FUEL PORTS.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
CUMMINS ISB5.9 G
CUMMINS ISX12G
CUMMINS WESTPORT ISL9 G

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