Passenger door won’t unlock

Passenger door won't unlock. I flip the switch on to unlock the doors and the drivers side works but the passenger side won't unlock. The button stays down.

My car has 185000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
If all of your door locks are working properly other than the passenger front door, the most likely cause of this issue would be the door lock actuator. The door lock actuator is the small electric motor that physically moves the lock from one positon to another. If the door lock actuator has failed, it will not be able to physically move the lock. I would recommend having the door lock actuator replaced in order to resolve this issue. Consider YourMechanic as a certified professional can come to your home or office to replace the door lock actuator for you.

How to Identify and Fix Common car Problems ?

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

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.
The Power Locks Don`t Work

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 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.
For safety/security reasons, the single button push opens only the drivers door. This is to avoid the chance that someone hiding on the opposite side of the car could hop in simultaneous with you. The 2nd push of the same button is to unlock the other doors, and the external trunk/hatch lock as well.
Car door locks may stop working because of a weak battery or faulty alarm.
The majority of cars now have remote central locking, however, with a flat or dead battery this won`t work and you will be forced to use the key to open the car doors.
The manual buttons are located on each door and unlocking one of them will unlock that specific door. Old cars with no electronic locking mechanism don`t have an automatic unlock button, they can only be unlocked by engaging the manual unlock button on the door, or by using a tool to pull the handle from the inside.
Lubricate

Lubrication is one of the few reasons why your car doors often won`t open. Maybe you cannot turn or use your car keys simply because dirt or debris is blocking the keyhole of the car door. Try lubricating the keyhole and cleaning the inside. You can repeat the process until there`s no blockage.

If the key won`t turn in the door lock, the problem could be dirt or dust in the cylinder causing the pins to be stuck in a partially raised position. If that`s the case, it may be an easy fix. You can spray dry lubricant into the keyway and then insert the key a few times to get the lubricant working.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

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.

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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.

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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.

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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.

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Door lock problems
ANSWER : Hi there. There is a resistor for the door locks that keep a voltage on the driver door lock cylinder to activate the secondary door locks electronically. If the resistor is leaking (losing power) it tends to cause the door locks to not work. You can try unlocking the driver door, then open the driver door and use the key to unlock the other doors. This will supply power directly to the driver door lock cylinder and bypass the resistor. If the other doors unlock, then the resistor needs replaced. If the doors do not unlock with the key and the driver door open, then the door lock cylinder on the driver door will need replaced. If you need further assistance with your doors not unlocking when turning the key twice, then seek out a professional, such as one from Your Mechanic, to help you.

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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.

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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.

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Wondering what the range for door handle auto-unlock is?
ANSWER : Hi there. Typically you have to be within 10 feet of the vehicle in order for the remote key to link with the security system on the car and to activate the manual door unlock button. You should be able to find this information in the vehicle’s owner manual. If you don’t have one, feel free to contact the local Dodge dealership or search online and download the manual so you can clarify this question.

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