There are only 2 things you can try to fix this yourself.
Manual door lock not working.
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.
If your door key doesn t work right the first and most obvious step is to be sure you re using the right key.
Many door knob and lockset problems can be corrected before they become so serious that the lockset does not work at all.
The key fob is faulty.
Reinstall the plastic cover and replace the assembly.
Reinstalling the door lock actuator step 1.
Step 3 work the lock manually.
If you can put the key in the lock but cannot to turn it the lock may have seized because dirt or grime has gotten caught in the mechanism.
Here we look at repairs for locksets and knobs.
While the key is in work the door lock manually up and down while using the auto lock at the same time.
If they do work the problem is most likely in the door lock solenoid.
If that doesn t work i would venture to guess that the wafers in your door lock have worn down to the extent that you need the lock replaced.
If the battery isnâ t the problem the issue may be with the fob itself.
Next the lock needs to be lubricated.
If not then you may have a blown fuse.
Clean and reconnect the actuator.
This is one of the most common reasons why your car door lock is not working.
If you have a key that won t work in the lock please see how to repair keyed door locks.
If that does not solve it turn off your engine disconnect the car battery wait about 5 minutes.
Wait 5 minutes start your car.
Spray electrical cleaner onto the black electrical connector.
Never use oil for this task.
Often a malfunctioning latch assembly or lock mechanism causes the problem.
If your car key is not working when you attempt to unlock your car there is a possibility that the lock itself is damaged.
If your locks arenâ t working replacing the battery in the key fob could solve the issue.
For other types of problems with door knobs and locks please see repairing door knobs hardware.
Door key does not work.
I worked as a locksmith for many years and saw many people who would come in with this exact problem.
The key fob battery is dead.
Sorry that we feel the need to state.
Part 5 of 6.
Attach the plastic door lock actuator back onto the.
Turn off the engine and open the driver side door to turn the radio off.
Here we look at how to fix problems with a key operating a door lock.