Hello, I would really appreciate some advice here. I have two keys for my Skoda Octavia Mk1. One works perfectly, but the other has suddenly stopped de-activating the immobiliser. The central locking action works fine, but when I attempt to start the car, the light on the dash flashes to indicate that the car is still immobilised. Can this be caused by a weakening battery in the fob or do I need to reprogram it in some way? If so, can anyone explain how this can be done? Thanks very much for your help in advance.

have you dropped the key recently?

I don't believe so.