open door warning

Not sure what to make of this..
this morning, the 'open door' warning light came on for the driver door. i double checked this and it was definitely closed, tried opening/closing the door, this had not effect. though id leave it till after work tonight to have a check. when i got to work, i tried closing the locks via the remote and the doors would not shut via the remote i.e. clicking the shut button would not do anything!
so i closed by hand/key. tried to reopen with remote again, the driver door opens, but no other door.
from this point, i am unable to close any doors via the remote, have to do by key manually.
are the two problems linked?
both started this morning.
Thanks.

Remote locking of doors is via the CCM under the passenger front carpet. Do a search on here for CCM and wet carpets.

thanks, ive always cleaned out the plenum chamber when i do the annual service. so no wet carpets for me.
how much can i expect to pay for the CCM to be replaced..roughly?

It is usually a wire fault rather than CCM fault. A good VCDS read might give you a hint.

hmm.. ok, i'll get the vagcom hooked up tonight and report back.

i checked again throughout the day, with no change. i also checked the button on the remote for the boot. pressing this does not open the boot either.

vagcom reported the following:
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
01320 - Control Module for Climatronic (J255)
49-10 - No Communications - Intermittent

Does this show anything up?

Try disconnecting the battery. I have had similar lock troubles a couple or three times when I have recovered from a flat battery after leaving the coolbox plugged in. Disconnecting and reconnecting reset the CCM.

You need to look at 046 convenience control module. It should have logged a remote locking fault. As snapdragon says, a low voltage can cause this.

i specfically ran the 046 convenience control module. however that came back with no errors!
interestingly this morning, i noticed i am unable to unlock all doors from the remote, but then not able to lock anything via the remote.
i can lock all the doors via the central locking switch internally from the drivers door side panel (where all the controls for the windows are)

That suggests either the remote has packed up or the fault is the aerial connection to the ccm. The ccm won't report a fault if it never gets a signal.