Ford Expedition 1999 — technical service bulletin
Bulletin 12086 · NHTSA communication 613067 · issued Nov 1, 1998
Technical service bulletin
communication type
Power Train
component
1999
model years
5
vehicle entries
Official summary
Some vehicles may exhibit an inoperative speedometer and dtc p1635 after a pcm has been replaced. *mjs
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.