noticed recently that my rear drivers side window does not close/open when holding down the button on the key (unlock - open, lock - close). all seem to work as normal, but not the rear one.
An error was brought on the screen to,...can't remember off the top of my head, as it didnt bring the error the last time i drove it, so im guessing it only comes up when i try to use that feature with the key. - will try again later..

any possible reasons? solutions?