My main key stopped working. My spare still works. Tried the battery, that wasn't it.

Reprogrammed both keys. Both work now.

Am worried now in case it stops working again when I away from home.

Any ideas?

 

Were you marked near a mast or a receiver of some sort. These scan block out the signal.

 

No was parked in my drive at home. No masts nearby. My spare key worked fine....

 

That is wierd, the same happened to me at Christmas. I have not yet fixed the key, I am just using my spare at the moment, asuming that it was just the battery. Car is getting serviced in 2 weeks - was going to get it sorted then. Car is 2 years old BTW, is yours about the same?

 

battery could be low or maybe you knocked it and without the power it reset ?