The SES light can be for anything the computer sees that it doesn't like. You have to scan it or you will have no clue where to start. It may be emissions related and covered for 5 years 50k. It may also be transmission related, AC related, or some other system monitored by the ECU. The ticking you are hearing may be excess heat in the catalytic converter which may indicate a misfire, but could be something else. You have to get it scanned, and don't delay too long because if it's running lean you could do more damage.