Sudden Viper 791xv Problems

Hey everyone I first wanted to say thanks for the help and answers you have all provided in the past. Just yesterday I started having issues with my 791xv, I installed it myself several months ago and have had no problems it has been working wonderful! I do have experience in car wiring and electronics so it wasnt too bad at all. For a month or so now I have noticed that when disarming the alarm (2 chirps) the first chirp sound like it should while the second kinda drop to a l ow tone. I might add this had only started after the temperatures have dropped around here to around 25 or less on a daily basis now. It was not really a big deal I dealt  with it. Starting yesterday I  notcied that it seems my distance or range for disarming and remote starts have diminished. It went from a really good range being able to start and disarm from a good distance to now having to be no more than 20 feet away or approximately. I get the 3 beeps on my remote saying I am out of range, it really bugs me because I can not even get enough range to remote start or disarm from right inside my house where I was able to before. Any suggestions? I check everything and even reset the unit still the same results.

cool ill try that any other suggestions just incase

replace ur batterys in ur remote if there still is a problem sounds like ur antenna has a bad connection or has gone bad. if the ground is loose the whole system will go screwy...