Transponder/proximity keys

[recall]

Hi all, 

just a quick question,

I think it’s electecial, I have a 2010 focus keyless start, anyway, a few years ago my keys was lost and a auto locksmith reprogrammed me 2 new ones but there was a 3rd he said didn’t work and gave it to me I’ve never used it cus like he said it didn’t work.

 

but yesterday me being stupid I took it to see if it did and when I was sitting in the car when the car on but not started that dogey key did work then so I was messing with the keys pressing the buttons anyway I got out locked the car with my normal key..but today the car comes on but won’t start and it’s acting all weird. 

Any idea what it causing this? 

 

Cheers 

[timwoglin]

If you know that your car won't start then why you waste your time, take nearby locksmith help and get the new car key.

[johnycens]

Why don't you check the battery of that fob may be there's some issue in that fob. It's also happened with me and i took neasden locksmith help and ended up replacing the fob's battery.

[AdrianPeterson]

Well i never have locksmith services for such key programming problems but if you suggest then i will surely try for once.

[SophiaMarian]

If you never have locksmith services then have because locksmith can offer you services at very cheap then dealership. Locksmith Miami Beach experts have made a key fob for me at half the price offered by the dealer.