Elite League leaders the Belfast Giants lost 4-3 to Cardiff Devils on Sunday.
Goals from Darryl Lloyd, Craig Peacock and Adam Keefe put the Giants in control, but Paul Bissonnette, Josh Batch and Faulkner responded for the home side.
The game went into overtime when Faulkner settled it in Cardiff's favour.
It gave the Welsh side their third win on the trot and kept them third in the table, while the Giants suffered their second lost in four games.