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Service bulletin 12991

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 id614777
Published by NHTSA2000-12-14
Manufacturer's number12991
Manufacturer's date1999-07-01
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

NHTSA's summary

SOME OBDII VEHICLES MAY EXHIBIT A KEY ON ENGINE OFF (KOEO) SELF TEST DIAGNOSTIC TROUBLE CODE (DTC) OF P0605 (PCM ROM TEST ERROR). *TT

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

Transmission and driveline, Automatic transmission, Transmission control module

Trouble codes named

P0605

Vehicles listed
FORD FORD
LINCOLN LINCOLN
MERCURY MERCURY

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