Sandman said:
Yes this issue is annoying and so far the only fix still available is to change the entire central locking module which costs around 300 usd, lucky for me the problem comes and goes and I'm fine so far since I posted this 1st June, *crosses my fingers* :? If your car in under warrenty and the moment first signs of this problem occurs i strongly advised sending it back to the dealers asap.
Since you have error codes showing it sounds like you have the problem tracked down - Guess you can wait for a breaker to come up.
One other thought - is the door pin operating smoothly? I ask only because one time I removed my inner door trim and refitted it. I did not get the door pin correctly aligned and it was pinched so did not allow the door to open. Gave the impression that the mechanism was not working.