Ford Expedition 2004–2005 — technical service bulletin
Bulletin 04221 · NHTSA communication 10013393 · issued Jun 7, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004–2005
model years
8
vehicle entries
Official summary
Malfunction indicator lamp on with misfire dtc's spark knock piston scuffing. *eh vehicles built through 4/25/2005 - 5.4l 3v engine. *tt
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.