Fuel Cap Off Indicator Light
WARNING: This page is about a different variant/trim than selected.
NOTE:
Continental, Escape, LS, Mustang, Thunderbird, Town Car and Windstar do not have a dedicated output wire from PCM to instrument cluster. PCM commands Fuel Cap Off Indicator Light (FCIL) on and off through Standard Corporate Protocol (SCP) BUS (+) and BUS (-) circuits.
FCIL is an output signal controlled by PCM and will illuminate when it is determined there is a failure in vapor management system due to fuel filler cap not being sealed properly. This would be detected by inability to pull vacuum in fuel tank, after a fueling event.