1996 4.0 Range Rover won't unlock

I have the same problem sometimes
1 Check the condition of your battery, if old, it will not give full power required to communicate with the security system.
2 If you don't have the EKA of your RR, try this next time you get caught, put key in the drivers door look, press unlock button on key fob and at the same time turn to unlock, if all locks unlock then the engine should not be immobilized - Good luck

Lock doors with the key. Take out key . Insert key open and close lock 5 times then on the fifth turn open door this will reset the disable code to normal . I had this code on my P38 Range Rover and the Rover Tech assisted me with this simple way to reset the engine disable fault code . Good Luck .

more details required.. sorry..

turn key in unlock position and hold for 3 seconds.

Unfortunately, there is a trick to replacing the battery.
1) Open the Driver side door.
2) Open the Bonnet and take the battery cover off.
3) Use your remote to lock and unlock the car (keeping the driver side door open)
4) Pull the Negative Lead from the battery first, followed by the Positive Lead.
5) Change or replace with charged battery.
6) Closed down Bonnet.
7) Your windows, sunroof, and key FOB will not work... so follow the next steps.

7a) Insert your key, with door closed into the exterior lock on driver's side.
7b) While turning the key to lock the door, hold down the "lock" button on your remote for 5 seconds while in "lick" position
7c) Your remote will reset, and you should be able to use your remote now
7d) While driving, roll each window down twice. On your third attempt, you should only have to touch the window button, and the window will have reset

Enjoy your Rover!
MIke

body control module

This is the anti theft function working as it should. Your husband needed to override it with the key. The command told the car to lock down. Because the key was not in the car the anti theft set off the alarm and locked down the engine as well.
This is exactly what you would want the car to do if you left it locked on the street with your windows down while shopping. Otherwise someone could reach in the window, unlock the door, slide in and start hot wiring the car.
These lock functions are programmable and can be changed at the dealership.

I have a 2002 land rover discovery and my passenger front door won't unlock with the interior lock button on the dash or with the key fob. The only way to unlock the door is to pull the handle on the inside of the door. Is the actuator bad?

Please help
Rover2163

There are several possibilities. You need to determine if the problem is mechanical or electrical.

Can you move the door lock lever manually? If that does not work the problem is probably the mechanism and it will mean removing the door trim to get at the various linkages - there are several - see image. It does not happen often but the ends of the connecting wires can slip out of their housings. Also the plastic ring on the keylock can break.

The other option is an electrical fault like a broken wire in the loom running through the door frame. You will need to find both ends of each wire and test for continuity with a multi-meter. One of mine was broken right in the middle. If that is the cause, it is easiest to run a new wire to replace the broken one - not an easy job but it can be done with patience.

first thing i would be checking is the door switches on each door if are broken or by removing switches to see if connection is broken or badly corroded also check bonnet & tailgate switches for same problem.