Tailgate won't open or lock on my 2004 porsche cayenne the display on the dash shows the gate is open but you can't open it and it won't lock , so the display remains on.help!

Question edited for clarity, name of maker and spelling of 'Cayenne'.
Question moved to category.

Seems to be a known issue.

https://www.google.com/search?q=2011+porsche+cayenne+tailgate+won%27t+close

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start by scanning vehicle for trouble code --fixing battery issue --resetting or reprogramming fob/security system

I haven't come across the problem before but I am increasingly hearing of modern cars thinking for themselves (as they are designed to do), the trouble is they sometimes become disoriented and feeling they must try and behave normally they put 2 and 2 together and make five.

Usually it is a case of automatic windows that are closed before they expect to be closed and think they have encountered an obstruction and so go into reverse.

I think it needs dealer diagnostic equipment to reset these things...

no you have other problems

they have heaps of electrical problems e.g. dash air suspension and maping updates porsche dont do so you will be stuck with old maps so make sure you get a quote to fix anything first as they are very expensive

I have a similar problem, my tailgate stopped working with the outside handle and the remote but can be opened manually from the inside. I don't have an alarm so there is no problem with that but did you get a solution for the tailgate problem that I could try?

It's likely the fuse. The fuse diagram is in your owners manual. The fuse box is on the side of the dash when you open your driver's door. That should solve your issue.

Have the dealer check the KESSY system. This test will show up faults. Diagnosis will be required to go further. You might end up recoding the KESSY CU or maybe even replacing it. First step though is the scan at the Porsche dealer / specialist.

Emergency operation of rear lid
If the rear lid cannot be opened with the radio
remote control (e.g., if the battery of the remote
control is dead), the emergency operation must
be performed:
1. Unlock and open the driver's door with the
vehicle key.
2. Switch on the ignition so that the alarm system
will not be triggered.
3. Check if the TAILGATE function is activated in
the multi-purpose display of the instrument
panel.
Please observe the chapter “TAILGATE” on
Page 119.
4. Press the central locking button in the armrest.
The rear lid is now unlocked and can be opened
with the unlocking handle