Ford Expedition 2003 — technical service bulletin
Bulletin 03132 · NHTSA communication 10003727 · issued Jul 7, 2003
Technical service bulletin
communication type
Suspension
component
2003
model years
2
vehicle entries
Official summary
This article addresses the proper procedure to clear diagnostic trouble codes c1990 or c1991 from the vehicle dynamics module/4-wheel air suspension module. *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.