Lincoln Navigator 2003–2004 — technical service bulletin
Bulletin 18398 · NHTSA communication 10012960 · issued Feb 1, 2005
Technical service bulletin
communication type
Electrical System
component
2003–2004
model years
2
vehicle entries
Official summary
A diagnostic trouble code b2721 (liftgate/decklid ajar output short to ground or open) in the power liftgate module, without any associated symptoms - service tip. *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.