Ford Ranger 2002–2003 — technical service bulletin
Bulletin 17221 · NHTSA communication 10004080 · issued Sep 1, 2003
Technical service bulletin
communication type
Engine and Engine Cooling
component
2002–2003
model years
2
vehicle entries
Official summary
Spark knock, detonation, or ping condition on tip-in or during steady state operation at or near wide open throttle. *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.