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C1278 on the 2008 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 C1278
TSB-08-20-82009-02-26. Service bulletin. FORD: STEERING WHEEL ANGLE CIRCUIT AND/OR SIGNAL FAILURE-C1277-C1278-BUILT ON OR BEFORE 4/10/08. VEHICLES MAY EXHIBIT A TRACTION CONTROL LIGHT (TCL) ON WITH DIAGNOSTIC TROUBLE CODES. *PE

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.