Can't open the trunk of my nissan sentra 1999

Oh dear, more issues with your Sentra :>(

Valet button?

You were right...there was a little switch in the trunk.....I still don't know how it could have gotten set, but I'm good to go now

https://www.nissanforums.com/threads/trunk-wont-open-with-fob-or-trunk-release-button.138679/

https://www.justanswer.com/nissan/2nv41-06-sentra-trunk-will-not-open-neither.html

Lots more information

https://www.google.com/search?safe=off&rlz=1C1QJDB_enCA643CA644&sxsrf=ALeKk01ihYj16NJO1uAxSUqlfp02I32e4w%3A1612304278765&ei=ls8ZYIecLq6Rggfb6xs&q=2006+nissan+sentra+trunk+won%27t+open

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Pull the seat lower cushion up and out then unbolt the seat back to gain trunk access,

you need to have some software like you would use on the ecu but for the central locking unit instead .. i think there is a separate fuse for the rear lock. check it and see if it has blown. only other way to get in the back is the arm rest in the rear seat. and open the short side of the back seat. there is a pull bar and the back of the seat need to pull the bar and pull the seat down at the same time.

may be manual release behind or under back seat and if not you may need to remove back seat and panal which should let you into trunk. once in there should be a release on the trunk inside to open it. most new cars have them to prevent someone from getting locked in trunk. after opened you may want to have lock system replaced or it could simply just need oiled....... hope this helps and good luck

imnside the trunk on the latching system the is a leveler push it down or pull it up. that will fix the problem

It is located in the gas tank as a part of the fuel pump assembly and im not sure about the access but if you cant see a removable plate in the trunk then the tank will have to be droped.

spray some wd-40 on the latch on the trunk lid

this is strange. is there access to the trunk from the rear seat? if not the rear seat will need to be removed to get to the trunk and then there will be a pull ring that releases the trunk latch. it is a safety requirement on all cars to let someone get out of the trunk

you have to remove the bottom part of the seat and then un bolt the upper part

Replace Trunk Lock Cylinder , Opens up With Power Button or Release Lever ? If not the rear Seat comes out Simple and W/ Light You Can Open turnk Through the Rear Seat Opening. Hope this Helps