Amber engine Warning Light?

Ive got a Fiat Stilo 1800 16v, ive just been on a 10min motorway journey and the amber engine light came on and the dashborad displayed a message to check the engine. ive looked in my handbook which really didnt explain anthing. The car drove normally and im unsure as to check what in the engine?? Is the car safe to drive? Will i do damage if i do drive it?