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C1917 on the 2002 Ford Expedition

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.

Bulletins for this model year that name C1917
154332002-04-16. Service bulletin. SOME VEHICLES BUILT AFTER 4/10/2001 AND EQUIPPED WITH AIR SUSPENSION , MAY EXHIBIT AN ELECTRONIC VARIABLE ORIFICE (EVO) STEERING DIAGNOSTIC TROUBLE CODE C1917. *TT

1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.