Not sure if anyone can help. 
 I have a focus ST Mk3 2015 that has keyless entry and start however, a few weeks back the key fob just died so I could not lock or unlock the car it had to be done via key blade. I also cannot start the car unless I put the key fob on top of the receiver in the drivers arm rest. 
 

I changed the key battery but still nothing so I had someone come and look at the key and he said the key is sending the signal to the car but the car does not seem to be receiving it. I have checked the fuse for keyless entry and also disconnected the battery  in the hope it would reset its self but nothing still. 
 

Anyone got an idea what else it could be and the rough price to have it fixed in the UK ? 
 

Thanks

Hi, I recently discovered this issue, I’m curious if you found anything more about this topic or got it resolved? M assuming my antenna is buggered 

1 hour ago, Alexanderevans said:

my antenna is

Try replacing it with a British Aerial

Main vehicle battery on way out, not fobs or bcms or aerials  get amperage CC tested and not the voltage.