My '05 Crossfire SRT6 w/ 12K miles is great except when the extremely loud siren goes off. Most of the time when I lock the doors with the FOB, the lights and siren will start flashing and going off about 5 to 15 minutes later. I try stopping them by pressing any of the three buttons on the FOB with no success. After what seems like hours (5 minutesą), it will stop. One time the alarms went off a few minutes after I started driving it. The doors lock when the car is in motion.

The car is still under warranty. The dealer has looked at it twice. No codes. Does not know what to do.

Help.