I don't know if I have computer trouble or not with my CF. The alarm goes off five minutes after I have arrived home. It doesn't go off anywhere else except in my front yard, almost five minutes after I exit the vehicle. Also, the tire pressure light has been on for six months. I have put new tires on the vehicle and taken it to a tire specialist and the light will not budge. Finally, my check engine light comes on randomly. Has anyone else had this problem?

 

The tire pressure light could be one bad TPMS sensor.... you will have to take it to a dealer or indie shop to have them put it on a STAR machine and tell you which one (if any) is bad....
If you dont care about the the light you can do a DIY fix that disables that light... it is posted here somewhere.....it works good...

CEL could be anything.....do you have a OBD II reader to see if you are getting any error codes??

The security system has it's own computer.....SKREEM module.... How old is your battery??

 

That was my first thought. Those symptoms could be signs the battery is failing