Ford Expedition 2003 — technical service bulletin
Bulletin 16946 · NHTSA communication 10003836 · issued Jul 1, 2003
Technical service bulletin
communication type
Electrical System
component
2003
model years
2
vehicle entries
Official summary
Diagnostic trouble code c1790 in air suspension (4was/vdm) 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.