Passenger side door not unlocking manually with key. Key won’t insert into the door. Trunk lock works fine.

Hi, the remote unlocking features of my key stopped working about a year ago and I have been manually unlocking the door ever since. However, recently I have not been able to unlock the driver side door with by inserting the key manually. I have to insert the key into the trunk to unlock the entire car. Whenever I try to insert the key, it feels like it is not the right key to the car. Please advise.

My car has 62000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi there. The door lock cylinder has either an object in side it causing the key to not fit or the pins inside the cylinder has fallen into the key hole. I recommend replacing the door lock cylinder. If you need further assistance with your key not working in the door lock cylinder, then seek out a professional, such as one from Your Mechanic, to help you.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

A malfunctioning logic board or a break in the wire could cause problems. If the lock and unlock function works intermittently, there could be an electrical short in the system due to the plastic insulation of the wire being worn down. If it has ceased to function at all, the wire could be broken.
The keyless entry system receiver(s) on your vehicle may not be picking up the signal from the key fob. Try holding the fob right next to the door handle when pressing the unlock button. If it unlocks the door, the problem may be a weak battery in the key fob, or a problem in the keyless entry antenna or wiring.
The most common cause of a door not unlocking with your remote key is a broken door lock actuator. To keep from needlessly removing and installing a new door lock actuator, there are a few ways to diagnose a bad door lock actuator that we`ll discuss further.
One common reason the car door lock is stuck in the locked position is due to broken connections within the door panel or lock assembly. These include a broken link from either the handle, lock cylinder, or interior locking post/switch to the car door latch.
If the locks on all doors suddenly stop working or responding, the key fob may be to blame. A dead battery or a malfunction may prevent the fob from sending a signal; in this case, the key fob may need to be reprogrammed or replaced.
If only one door isn`t working, there`s likely a problem with a door switch or sensor. If this is the case, you`ll need to have a mechanic take a look at your car. If all of your doors don`t open, you could have a blown fuse.
A problem with one lock is probably due to the lock actuator or another malfunction inside the mechanism of the door itself. But if none of the power locks work, check the fuse box in your vehicle. A blown fuse can cause the power locks to stop working.
If only one door isn`t working, there`s likely a problem with a door switch or sensor. If this is the case, you`ll need to have a mechanic take a look at your car. If all of your doors don`t open, you could have a blown fuse.
If only one door isn`t working, there`s likely a problem with a door switch or sensor. If this is the case, you`ll need to have a mechanic take a look at your car. If all of your doors don`t open, you could have a blown fuse.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Passenger side door not unlocking manually with key. Key won’t insert into the door. Trunk lock works fine.
ANSWER : Hi there. The door lock cylinder has either an object in side it causing the key to not fit or the pins inside the cylinder has fallen into the key hole. I recommend replacing the door lock cylinder. If you need further assistance with your key not working in the door lock cylinder, then seek out a professional, such as one from Your Mechanic, to help you.

all doors lock only by inserting key in passenger side door and locking
ANSWER : Your central locking system may have been designed with a control module in the circuit. This is a small computer that is responsible for controlling the different functions of a particular system. It is possible that the module for your central locking system may have shorted out internally preventing particular functions from working properly. I would recommend having a certified technician test your central locking module to determine if all of its functions are working properly.

Driver side door lock button not working, and passenger side sliding door makes a buzzing noise
ANSWER : Hi there. These door issues are common on this vehicle. Most of the time the main issue is the master door lock switch on the driver door. It sounds like you already replaced that. As for the sliding door problem, most of the time, this is a failure within the door module or it can be a connection issue.

I typically take the door apart and check the connections on the module and inside of the door just to make sure that there is nothing apparent in there. If the connections and the wiring are fine, then I use a scan tool to check the module to see what the inputs and outputs are doing. If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your door problem and recommend a repair.

Driver and Passenger doors won’t lock, but I hear them click and see the locks twitch.
ANSWER : If the same problem is happening even when you use the inside door lock switch then the most likely cause of the locks not moving is going to be weak actuators. You should replace the drivers lock actuator first since it is used the most and you will see it fixes the problem. Then you can replace the other doors as needed.

Having problems with door locks on 08 Cadillac CTS. Driver side door especially and will not lock or unlock with key. Others loc
ANSWER : This is often related to a malfunctioning door lock actuator, a blown fuse or a faulty power door lock switch. When you use the door lock switch in the car it sends a signal to a relay which then activates an actuator inside the door. The actuator is the final step in the process in that it is a small motor with a set of gears that actually locks and unlocks the latch mechanism inside the door allowing the door to open. When this motor is bad, the latch mechanism will fail to operate and cause the door not to unlock as it is designed to. In the case of a bad door lock relay, the power, normally needed to send the signal from the switch when you activate it to the actuator motor is not there. This means the relay is not allowing the circuit to be completed and the actuator motor is not activated. Any of the above may cause your power door lock switches not to work properly and should be diagnosed by a qualified mechanic. I would suggest having a professional from YourMechanic come to your location to take a look at the door locks in your vehicle.

Key will lock doors and trunk, but not unlock doors on 2004 BMW 645Ci
ANSWER : Hi there. The first thing I would do is try another key to see if you get the same results from the key control. If the separate key works, then it is the key that is the problem.

If not, then I usually start by reprogramming the receiver module first. If that does not help, then the module may need to be replaced.

As for the window, if a window will go down and not up then the left actuator is bad. It takes more effort to close a window, so a failing actuator cannot close the window. If you need to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your door locks and windows so that you can have the correct repairs done.

Doors wont lock or unlock with fob or switch?
ANSWER : Hello. Further testing should be done to help solve your problem. Being that the door unlock reprogramming procedure has already been done and the fuses have been checked there’s not much left it could be. When you hit the unlock button you should hear a little noise in each of the doors. If you hear the noise that means that the motor inside of the door actuator is working therefore it is likely the actuator itself as the problem. Though if you do not hear any noise that means it is likely the motor inside of the actuator. The actuator motors are very common failure on Lexus. The Lexus Community is almost an uproar because the a L in Lexus should also stand for luxury but there have been widespread simple problems reported such as this. A technician such as those we have here at yourmechanic will be able to diagnose your door lock issue for you firsthand. But if you consider following the test I suggested that should help you narrow down to a solution as well.

It may also be a beneficial to take a door panel off and probe a multi meter to the door actuator connectors to ensure they are receiving the proper power and ground when the buttons are pressed. If they are that only leaves two things that can be at fault. The door actuator or the motor inside of the door actuator.

My window on my passenger side won’t roll down and the lock button doesn’t lock the doors.
ANSWER : Hello, thank you for writing in. Your issue is most likely a switch. The window motor would not effect the door lock functions. The only true way to know is to test the power available to the switch and see if it is passing through, or making it to the motor. Where the power stops and is not utilized, is the component that has failed. If the power supply is not making it to the switch, then you have another wiring or fuse issue. Without doing some electrical testing, you may want to start with replacing the switch. For more help with diagnosis and resolving the issue, contact our service department to schedule an appointment.