This is a tricky issue because the linkage on the door latch has malfunctioned, you will have to push the passengers seat as far back as you can and then remove the door cover to gain access to the inner door lever and locking latch .
In some cases the locking rod gets unhooked and trapped causing you this issue .
This is a know problem .
No. 8 is normally your problem .or the latch will have to be replaced
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