2003 vw jetta 1.8t
 

Hi, i have had this car for a few months, i just refinanced from the dealer, basically what is hapening is, when i'm driving the car with ac on, the car will shut off, it will make 3 loud beeps all the lights warnning lights on dash come on, after this happens the car will kick back on, before i even shift the car back into park, it only does this with the ac on, never shuts off when ac is turned off, sometimes it will shut off for good with the ac on, so i throw it in park and it starts right up fine, lately its been doing this while ive been driving and thats not good, seems to do it when the car decelerates. and not every time. at least once every 2 trips of about 20 miles. but it does feel like it's happening more often.

my gf thinks its this unit ( i dont know what it's called) that the car dealer installs on cars that keeps the car from starting if you dont make your payments.

of course, i have refinanced but havent had a chance to take it to the dealer to get it removed, but i dont think its that, due to the fact this only happens when ac is on.

anyone know what may cause this, i think its some small fix
any help would be appreciated