[thom4782]

I have an 01S.

Several months ago, I replaced the passenger side regulator because the window would not drop when I opened the car. Shortly afterward, the central locking system started to act up. I would get various symptoms. The most frequent one was the 'double beep' when I locked or unlocked the car.

There were many codes. The most important one turned out to be one that indicated that the locking system wasn't synchronizing. The problem was intermittent. It happened most frequently when the car was out in the sun. I don't ever recall it happening at night. I also had an airbag light on.

The root of the problem was very hard to pin down. I guessed it was the locking mechanism on the passenger side when the window acted weird when pulling up on the door handle or releasing it.

The fix was to replace the passengerr door latch. My best guess is that one of its sensors failed or was in the process of failing and the central locking system could tell the position of the window or door handle.

Since the latch was replaced, the double beep symptom has not happened again.

PS: many independent shops have a computers that can turn off the airbag light. Try calling around to see if a local one can perform this service for you.
So my guess is that you have a bad the door latch.