2001 nissan sentra key fob problems

Hi Daniel. I'm Tim Dorton. Most likely will have to replace the door lock key cylinder. Do you have the key fob? See pg.EL-269.https://manuals.co/workshop/nissan/maxima/nissan-maxima-2001-workshop-manual/5529569

Get a locksmith to make a key for the door. that's the only way to disarm factory alarm is by unlocking the door with a key

The key cylinder for the door has a magnetic switch attached to it that sends a disarm signal to the alarm system. If the magnet fell out or wires broke that would explain this incedent.

If you lock the car with the key, you must open it with the key, or alarm will sound. If you lock on fob you must open on fob. If you use ke y, place in ignition quickly to silent alarm. Good luck

does your unlock button work in car? If it does, do you have another keyless entry key fob? If so does it work? If you just replaced the battery you can try removing battery and cleaning contacts within remote. I know some of the nissan altimas had the same issue and the only solution was a new key fob. Good Luck

Try disconnect negative battery cable for 10 seconds, then reconnect. In my case, after leaving lights on and draining battery, power locks on 2001 Sentra were not working, neither with remote fob or inside car. I have no idea why, but with above procedure, everything now works fine.

this may be an antenna problem or a remote entry module problem, check the antenna ground 1st..

my 97 had the same problem. if the key fits the lock and will turn the lock but the lock wont open the door then your problem lies in the linkage between the door lock cylinder and the locking mechanism.

if the key fits the lock and the lock wont turn at all, this is what happened to me, then your lock is seized. Ive actually seen this on alot of 95-99 sentras it seems to be some sort of design flaw. what I had to do was to replace the lock cylinder and locate a new key. the locks from a dealer are a little pricy so i went around to salvage yards, every nissan sentra from said year range door locks were all seized, I even tried the 200sx as its the same car but a 2 door, same problem. luckily i found out that the 94 nissan altimas have the same door locks so I dismantled the inside door panel of said altima and snagged both front door lock cylinders. i also got lucky as the key was still in the ignition, replaced both locks and got a key for about 20 bucks. depending on your problem you might need new lock cylinders