Why on my picasso car on the central locking will all the doors open but for one?

If its on a frequently used door...Normally the drivers,constant opening and closing can cause broken wires in the rubber sleeve from the doorframe to the door,thus rejoining or cutting and rejoining usually fixes the problem...I had this on a toyota..regards..Den|||because the solenoid in the door needs replaced....or has become disconnected|||THIS IS A VERY COMMON PROBLEM WITH MANY VEHICLES, FIRST CHECK TO SEE IF THE DOOR THAT IS HAVING PROBLEMS AS A GOOD GROUND AND HOT FOR THE ACTUATOR ASSEMBLY AND IF NOT REPLACE IT.





THIS MOST LIKELY WAS CAUSED BY CORROSION SO CHECK IF THE RUBBER BOOT IS IN GOOD SHAPE THAT PROTECTS THE ACTUATOR.|||could be anything from a broken wire to faulty lock check that you are getting power to solenoid in the affected door first then if your are check for a good earth then replace solenoid|||try the door relay in the fuse box or door|||the door that does not open will have a faulty lock solenoid.|||ITS KEEPING UP WITH NAME SAKE ONLY HAD ONE EAR