Hi Folks, new to the forum and wondered if anyone could help.   I drive an 09 plate SE model and have had the car for 5 years.   For the last 2 weeks I have been having an intermittent problem with a warning message appear saying "rear passenger door open".  It most frequently happens after a journey has ended and I want to lock the car.  The first time, I checked to see if the door was actually open.  It wasn't but i opened and closed it a few times to see if it would make any difference.  It didn't so I left the car unlocked and went back to it some time later and the warning message had gone so I was able to lock the car as normal.   The message has also appeared/disappeared on a few occasions whilst I have been driving.   Lastly, for the last 2 nights, the alarm has gone off in the middle of the night (there was no third party interference with the car).   I am guessing that it is either a faulty sensor on the door (had a look for this but couldn't see anything obvious) or an electrical fault somewhere?  The battery is original and has never caused a problem.   Any help would be appreciated.   Thanks