Strange remote key issue
 

Hi I am beginner of this forum! I bought 1998 boxster and it drives well.
It has some issues so I would like to solve.


The remote key is weird.

1. I can unlock(open) trunk with remote key.

2. I cannot lock and unlock the doors with it. But when I try to lock and unlock, I can hear some sound like something working inside the car and the red light on the key flashes.

3. I can lock and unlock manually.


What parts do I have to take a look and replace?

Thank you for reading my posting!