Car does not lock with remote after driving ,have to wait 20mints and the central locking will operate?

what could be the fault|||It sounds like it is time to change the battery in the remote control.|||the usual problem with central remote locking is jamming locks in the doors.





there are "solenoids" that operate the locks when you click the zapper dodad.. but if dirt in the locks etc is making resistance the solenoids sense the resistance and refuse to open.





maybe the jiggling of driving makes the jamming worse in your case. In addition to the above, its possible one of the wires to the solenoids has a loose or dirty connection.





I suggest you take the front door trim panels off and spray some WD40 (water repellant light oil in a spray can.. ) onto the locks and levers. WD40 won't effect the electrics. Check the mechanisms for free movement. While you have the mechanism visible operate the door clicker doodad and see that everything is working smooth. Let the WD40 flow a bit from its spray can so that it flushes dirt out of the locks.





Unplug the wires a few times and reconnect them. If anything looks loose, replace or solder it. If any of the plastic bushes or metal rods look damaged.. repair or replace them,





If the central lock operates the back doors, do the above to them as well.





In all the above operations, check that the solenoids operate freely and consistently. Door solenoids are probably about $80 each at a wreckers yard if yours look a bit suss..





Even if the problem is as simple as a new little battery required for a clicker ( which I doubt very much since it would be really really weird for that to cause a fault that happens only after you drive the car! ).. the above procedure is normally required in a central locking system as a service item ( lubricate and check )..





Most of the joints are plastic bushes with metal rods, so just zapping with WD40 to get crap out is enough. But smearing a bit of "dry lube" or white grease in the mechanisms in addition.. isn't such a bad idea. Dont get too liberal with grease stuff however since it attracts and holds dirt and might jam the mechanism again even quicker!