Ford Expedition 2003 — technical service bulletin
Bulletin 17133 · NHTSA communication 10004050 · issued Sep 1, 2003
Technical service bulletin
communication type
Electrical System
component
2003
model years
2
vehicle entries
Official summary
Advancetrac lighting on with diagnostic trouble code c1277 (steering wheel angle 1 and 2 circuit failure) or c1278 (steering wheel angle 1 and 2 signal faulted) in the ivd 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.