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Service bulletin AS-21646

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 id10039136
Published by NHTSA2011-07-12
Manufacturer's numberAS-21646
Manufacturer's date2010-12-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL

NHTSA's summary

FORD: THE DIESEL FLUID IS CONTAMINATED RESULTING IN THREE POSSIBLE TROUBLE CODES STORED. *RM

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, Fuel system

Vehicles listed
FORD FORD TRUCK
FORD FORD TRUCK AND VAN
FORD FORD UNKNOWN

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