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C2777 on the 2003 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 C2777
160762002-11-07. Service bulletin. DIAGNOSTICS PROVIDED FOR DIAGNOSTIC TROUBLE CODES C2777 / C2778 (SENSOR CLUSTER CAN BUS FAILURE / SENSOR CLUSTER POWER SUPPLY FAILURE). *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.