If your car key is not working when you attempt to unlock your car there is a possibility that the lock itself is damaged.
Car key unlocks but doesn t lock.
Insert your key into the ignition and turn it to the accessory position.
If done right you will see that the car will lock and the unlock confirming the sequence.
To change the battery in the newer style all you do is pop off the rear cover.
If you drive a fairly modern car there is less of chance that you will have to deal with this which is mostly attributed to the presence of key fobs and keyless entry remotes.
In case it unlocks the doorway the issue might be a poor battery from the key fob or an issue from the keyless entry antenna or wiring.
Try the lock button trunk release button or panic button.
I d rule out a switch problem if neither side won t operate the lock function.
One will press and keep the unlock button pressed while the other one presses the lock button twice.
If you can feel the unlock function click but can t feel the lock function click it most likely a fault of the relay.
The key fob itself may be faulty or have a terrible unlock button.
Insert your key into the ignition and pull it back out six times within a maximum of just 10 seconds.
The key splits in 2 by inserting a flat head into the slot on the back then prise it open along the crease which should reveal the battery surely if the battery was faulty the lock boot buttons wouldn t work.
Continue holding the lock button and at the same time press the unlock button five times.
If done right you will see that the car will lock and the unlock confirming the sequence.
If your vehicle uses this method you will notice the exterior and interior lights flash.
Also he s got a different style remote to you.
One will press and keep the unlock button pressed while the other one presses the lock button twice.
Put another way you will need two hands.
2 press and hold the unlock button and then press the lock button center button three times.
If the other buttons work the problem is a bad unlock button.
Get in your car and lock the door manually.
Quickly remove key from ignition and within 10 seconds hold down the lock button.
In case the additional buttons work the issue is a terrible unlock button.
You will need a new key fob which will have to be programmed to your vehicle.
Insert the key into the ignition.
You will need to set these services up ahead of time.
If the remote key won t unlock car door even after battery swapping or fixing the battery contacts try a distant unlocking service.
The key fob itself could be defective or have a bad unlock button.
Most car brands offer a remote door unlock service for emergencies such as a broken smart fob and locking the keys inside the car.
Put another way you will need two hands.