My RR has had an intermittent fault for a few days now,
when you get in the vehicle it says smart key not found,

I found if I removed neg wire from the battery and reconnected it all was good.
the Battery is fully charged and only 2 years old.

But today nothing I tried would let it communicate with the car, I tried the spare key
and removed fuse 17, also I did the battery reset with cables touching.

Today I checked the KVM module in the boot but as far as I could see there was no corrosion
on the module or any water in the surrounding area.

Anyone got any suggestions about what I should do next or is it an expensive trip to the Main dealer

could be the key fob battery... ... - .- -.




Y. O. L. O.
.

Take it you didn’t have the message on the dash saying battery was low in the smart key?

You should be able to get it to read the key by holding it on the dash, as per manual.

Click image to enlarge

Both key fob batteries were replaced a few weeks ago and were working fine.

I also did the key under the dash as well, still does not recognise it

Not sure if this is likely but have you tried synching the keys? I have half an idea that if you don't replace the batteries in them within a certain time they go out of synch.

Might be totally wrong but, if you haven't tried it, nothing to lose John
2008 Stornoway Grey 3.6 Tdv8 Vogue
2005 TD6 Java Black Vogue - Written off!!
GAP iiD BT
2003 Discovery TD5 Auto, Nanocom Evolution - gone to a new home!
MasseyFerguson 152 - No electronics!! - Sold

Mine did this , couldn’t unlock , when I got in it wouldn’t start either .remote batteries brand new, recent battery on car too. Did a battery disconnect and it’s been fine since. Gremlins ...

You have to use Duracell batteries in the fob. Other battery brands sometimes don't work - just like this.

But then it should still read it when held against the dash....... should it not? Unless it’s now not synchronised? 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

I went out this morning to have another go at sorting the FF and it
recognised the key straight away.

The car was blocking my wife's car so I was thankfully able to move it away out of the way

I was then able to use the IID and check for codes, one was U201F-00 RFA intermittent and
some other audio codes, I am not sure if they will be related

I also checked with IID and it recognised both the keys, so obviously it is pointing to
a problem with the RFA, it also disables the central locking when it happens

I will monitor it through the day and see if it returns

Has anyone replaced their RFA module, I know where it is on the car
and looks straight forward to replace but I imagine it would need programmed to the car.