Passenger sliding door will not lock or unlock with button or remote will only lock manually by hand.

Lock/unlock motor may be failing. Remove the door panel and remove the connector from the lock motor. Check the dc voltage at the connector while pressing the lock switch. If you see battery voltage, replace the motor. If the voltage is low, inspect the wiring.

First read the owner's manual. If you don't have an owner's manual for your car, get one off eBay. You'll be surprised what you can learn about your Porsche from the owner's manual. Then, look for a button on the dash that locks/unlocks the doors. Or look for a button near the door handle that locks/unlocks the door. It may be near your window switch and look like a second switch. Lastly, see if there's a slide that locks/unlocks the door.

Sounds like it., check and clean connections to button first.

If someone else tries to open the door when you push the button it can mess it up.. i remember when i messed up my mom's car and she has the same car :) we went to ford and they fixed it somehow!

U will have to take the inside door cover off and manualy open it. And replace the electric door locking switch. Very common problem. Get the new lock and latch assembly from dealer,

this is a problem that can appear after your car battery died, cause the car didn't reset propely, so taking the battery out and putting it back in or letting your car die again would do the trick. I tried a lot of reprogramming procedured for my remote key, none of them worked, what did the trick though was simply unlocking the doors via the all door unlock button on the passenger side door, so simple.

Sounds like bad wiring, or bad door lock actuators. Check for power while locking/unlocking the doors.

READ YOUR MANUAL. THERE IS A SEQUENCE INVOLVING REMOVING A FUSE WHICH RESETS THE ELECTRIC DOOR OPENER. IT IS DESCRIBED IN THE MANUAL. EASY TO DO ONE YOU HAVE THE BOOK IN HAND.

I had problem with the door not opening from the inside because my kids put the child latch on.