08 V8V door locking advice please

[Gmw76]

Twice recently I have stepped out of the car and pressed the remote to lock the door and nothing has happened. Usually lights would flash, i would hear a clunk and door mirrors would fold. On the occasions this didnt happen I opened driver door again, shut it and the locking was then as normal.

Is this ' nothing at all' response' on two instances an early sign of module failure?

Any other test suggestions to home in on fault?
Thanks
Mark

[Gmw76]

Thanks guys I dont think it is the remote as if i open the door then shut it again it works as expected. I will try the advice given. Will hard reset on door modules stop my mirrors folding on locking and need a reflash?

Mark