C3 key fob 08 model

[Road_Hog]

I've searched for this but can't find the answer. One of the batteries went on one of the fobs, replaced it and checked the voltage with a multimeter. But it still won't work.

I've only been able to find something on the internet, which says to put the ignition on, hold the lock key for 10 secs and then wait half a minute, but that but that doesn't work.

Any ideas to bring it to life again?

[MikeT]

First google search states:

To reprogram the key fobs to the Citroen C3 BSI (or ECU) follow this procedure:

Gather all the keys to the car and remove any loops or rings from the keys.
Sit in the drivers seat with all the keys and all the doors shut, radio off, no lights, everything OFF
Insert a key into the ignition
Turn ON the ignition
Press and hold the LOCK button on the key for TEN seconds
Turn off the ignition and remove the key
Insert the next key and repeat the procedure
WAIT 1 minute, do NOT switch anything on.

When the 1 minute is up, open the drivers door, exit the vehicle, close the door

Test the keys each lock and unlock the doors.

If the keyfob battery is flat you need a CR2016 its always worth having a spare to hand. The Lithium CR2016 last for years on the shelf (or in the drawer).

If you have the new C3, you will need a CR1620

[Road_Hog]

As per my original post, that doesn't work.'

[qprdude]

Are the two procedures the same?
They read different to me.

[Lighty]

Neither is usually required, 08 model fobs either work or don't. Try disconnecting the battery on the car, suspect your fob has failed though.

[Road_Hog]

Seems like it has failed. What's the cheapest way to sort the key, barring buying one from a dealer.

[addo]

You can't make a used one work; it's unfortunately a dealer monopoly.