WenmarOpen by Wenmar Pro

Service bulletin E122

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 id10076111
Published by NHTSA2016-07-07
Manufacturer's numberE122
Manufacturer's date2015-10-20
NHTSA componentENGINE

NHTSA's summary

ENGINE IDLE SHUTDOWN TIMER (EIST) OVERRIDES POWER TAKEOFF MODE (PTO). When operating in PTO mode, vehicle shuts down after five minutes. New engine parameter incompatibility in MY2015B software (P151C) causes engine to use park mode engine idle shutdown timer in stationary PTO mode. Maximum engine run time in PTO mode with truck stationary is 5 minutes.

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

Trouble codes named

P151C

Vehicles listed
KENWORTH KENWORTH

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