2007 remote not working from outside the car

Hi my 2007 c3 remote does not work out of the car. if I hold it near the ignition switch it works fine. tried locking from outside (with drivers window down) will only lock /unlock very near ignition switch.any suggestions .Martyn

freedom24 wrote: ↑Mon May 13, 2019 10:07 am Hi my 2007 c3 remote does not work out of the car. if I hold it near the ignition switch it works fine. tried locking from outside (with drivers window down) will only lock /unlock very near ignition switch.any suggestions .Martyn

Hello Martyn

The 2007 C3 should come with two remote keys.

So the way to diagnose this is to use the other key, and observe the response. If both keys behave badly, change the batteries with fresh ones in the keys and try again.

Try moving the car to a different place to see if there is a local problem that is affecting the radio frequency signal.

If you still have the problem with both keys and two new batteries, in different locations then you are looking at the COM2000 unit but this gets a bit complicated.

Hi C3 Guru , I only have one key,and battery is ok (and new) ,the fault is still there no matter where I try it.it is as if the system is not receiving
the signal from the key at any distance . regards Martyn

freedom24 wrote: ↑Mon May 13, 2019 5:03 pm I only have one key

That is the trouble with buying a car with only one key, it becomes so much more expensive to diagnose key problems.


You could have the key tested at a locksmith that deals with car fobs. If the signal is weak, this should show up under the test.

Hi have had the key tested and is ok.I think it mustbe the part that receives the signal

freedom24 wrote: ↑Mon May 13, 2019 10:07 am Hi my 2007 c3 remote does not work out of the car. if I hold it near the ignition switch it works fine. tried locking from outside (with drivers window down) will only lock /unlock very near ignition switch.any suggestions .Martyn

The receiver is part of the COM2000 unit. This is how to remove the COM2000 from the C3 and these are COM2000 units on eBay.


It is best to remove yours then you can match the part number to ones listed. There are many different versions of com2000 across Citroen and Peugeot. Just match part number to avoid things not working or having to set-up with lexia.