Have a query about my peugeot 206...I have 2 sets of keys for it.
Went out to drive to work this morning and took the spare keys (couldnt find my own keys) and they wouldnt work.....central locking wouldn't work and the key wouldn't work in the door either So couldn't get into it

I'm thinking of 3 reasons why this has happened:
1. The battery has gone in the set of keys
2. The keys aren't programmed properly to the car
Or 3. The keys dont belong to my car(bought the car second hand before Xmas)

Anyone have any ideas??