8 Reasons Your Car Key Is not Working

We’ve all had one of those days. You are in a rush to go somewhere and suddenly, as you insert your key into the car door lock, you realize the key is not working.

At this point, you’re embarrassed. You start guessing what could be the problem. Often the answer comes to your mind easily, while other times you will think long and hard about what the cause may be.

If you’re wondering why your car key is not working, it could be due to a variety of reasons. We’ve all gone through a difficult time like this. In order to alleviate the headaches these issues can cause, we’re going to go over some of the common reasons your car key is not working.

Types of Car Keys

• Chip key

• Remote key

• Smart key

• Key fob

To diagnose the source of your problem, it’s important to understand the type of key you have and how it works with your vehicle. If you’re wondering why your car key is not working, knowing the specific type of key is crucial.

There is a misconception circulating that goes as follows: since the keys are used to operate a car, they must all match. Is that true? Unfortunately, no.

Although car keys are similar in many ways, they are all unique (which is why they resist the knock-on key method). So, it is important to understand your type of auto key in order to properly diagnose your key problem. One of the reasons your car key is not working could be related to the type of key you have. Previously, the most common key was a physical key that engaged in your lock and acted according to your contact.

Chances are, if your vehicle was manufactured before 1995, you have this type of key.

After 1995, most auto manufacturers started releasing smart keys.

Transponder Key

The transponder key is essentially a more secure way to link your key to your vehicle. There is a transmitter embedded in the key which transmits a signal to a receiver housed in the vehicle.

For the car to start, the transmitter and the receiver must exchange a series of signals that are used to verify that it is the correct key. If these signals fail to sync, it could explain reasons your car key is not working.

Today, the majority of modern cars are designed with this transmission device introduced by smart keys. This led to keyless entry systems.

A keyless controller contains several buttons, each of which contains a function.

The key sends commands to your vehicle to perform various actions. The smart key serves the same functions as a traditional key except that everything is done with push buttons.

Why Your Car Key Stopped Working

Now that we have touched on the subject of the differences between auto keys, let’s dive into the very reasons your car key is not working. There are several factors that could lead to key malfunctions, ranging from simple wear and tear to more complex issues with your car’s ignition system.

It is useful to remind you at first that if your key is broken in the lock, the following text will be of no use to you.

However, contact a locksmith who knows how to extract a broken key or a key stuck in a lock. Let’s start:

1. Damaged lock

If your car key does not work when you try to unlock your car, there are several reasons your car key is not working, one of which could be that the lock itself is damaged.

If you drive a relatively new car, you are less likely to have this problem due to the presence of keyless entry systems.

On the other hand, if you have an older car model that requires unlocking with a physical key, you will be more likely to experience this issue.

Likely, reasons your car key is not working include a faulty or damaged lock. Car locks work in tandem with the keys, which results in simultaneous wear of both the lock and the key.

This is not the only reason your key may not function properly. Since locks are found on the outside of your vehicle, the impact of environmental factors on the condition of your locks should not be underestimated. This means that your lock can become blocked by the accumulation of debris and dust.

On the other hand, you have to be careful of collisions that can cause significant external damage, further hindering the function of your car key.

2. Damaged key

One of the main reasons your car key is not working is wear and tear on your key.

When we think of damaged keys, the image of a split key comes to mind. This is an exaggerated perception that does not do justice to reality. However, a damaged key is not always broken. If you look at how the doors in your car work, you can see why. The notches in the key correspond to internal mechanisms of the lock or the ignition.

Keys are physical components that may not always stand the test of time. Most of us don’t pay attention to how much wear and tear on keys and locks over time.

We add a lack of maintenance to wear and we have a perfect recipe for a damaged key.

If the notches in your key deteriorate over time and the key is no longer able to operate the internal mechanism of the lock, it is potentially damaged and this is the reason why your car key does not work anymore.

3. Defective Contact Cylinder

Your key is not only associated with your door locks, it also works with the ignition of the engine. Car keys have several functions.

For every key that exists, there is a lock or mechanism that works with it.

If your car key does not work when you insert it into your ignition, that does not mean that your car key is necessarily damaged or defective. In fact, there are several reasons your car key is not working, and sometimes we are dealing with a symptom of a larger problem: a faulty contact with your car.

Cars are always mobile units of mechanical components. All of these components degrade over time, and contact is no exception.

4. Auto Key Batteries Are Dead

Sometimes you don’t have to look any further than the batteries of your transponder key or electronic key fob when troubleshooting reasons your car key is not working. This is a common problem with an equally common solution.

Batteries die over time, so diagnosing this issue is relatively straightforward. If you notice that your vehicle is not responding to commands and signals sent from your key, there is a good chance that the batteries have run out of juice.

However, keep in mind that this may not be the only reason that your car key has stopped working. Once you realize that your smart key is no longer functioning due to the batteries, the easiest solution is to find the right batteries and replace them. After this simple fix, your key should work like new.

5. Internal Damage to Keyless Entry Systems

As I mentioned earlier, there are several types of keys that have their own characteristics and traits. One of the reasons your car key is not working could be due to the smart key, which establishes communication between a transmitter and a receiver. If one of the components is defective, your key will not work correctly.

If the problem is with your car’s electronic system or there is damage to your receiver or transmitter, the car key will not work.

Sometimes, the components of these electronic systems will wear out, and this wear is manifested more often by bare, cut, or frayed wires.

In other cases, damaged internal wiring may result from external damage to the chip key itself.

These problems arise when we drop the key or it receives a hard impact that shifts the internal alignment of the key’s components.

6. The Key Has Not Been Programmed

Even traditional keys have to go in a car. However, there are several reasons your car key is not working, particularly when it comes to modern technologies. Technological advancements in the automotive industry have changed the way we think about this pairing. Now, the way car keys are paired with cars adds a higher level of protection.

This is accomplished through transmitters, which are put in place to facilitate the interaction between the key and the car, thereby making car protection more difficult to circumvent.

Traditional keys do not have programming bugs, unlike transponder keys and joysticks.

If your key does not work with your vehicle, it is possible that the key has not yet been programmed with your car. It is common to forget to reprogram your transponder key when you acquire a new one or when you make duplicates.

If this is not done correctly, the key’s functions will be limited to opening your doors or your trunk.

7. Auto Keys From Spare Parts Markets

Car keys that can be purchased at service parts stores are a cheap option to replace or find a duplicate for your key. Before purchasing from this type of reseller, it is essential to understand the risks that these types of keys pose.

We often forget to keep a clear head when the urgency of replacing a key bothers us and slows us down in our day.

If you buy a used key and don’t reprogram it, your key won’t work anymore. Used stores are a good place to get all kinds of automotive items.

However, keep in mind that some parts that were not designed for your vehicle require extra work for them to function properly.

So, it is very important to make sure that your used key is programmed correctly so that it works well with your vehicle.

8. You Use a Duplicate Key

Duplicate keys are popular with drivers, and with good reason. This gives you the peace of mind that the chances of getting caught out when you get into a collision outside your car are less. You will have the luxury of sharing your keys with a family member when they want to use your car. However, many people do not realize that any duplication of keys reduces the integrity of the original key. In fact, one of the reasons your car key is not working could be due to the wear and tear caused by using a duplicate.

It may seem difficult to grasp, but let me explain. Each time your key is duplicated, the duplicate you get differs from the original, and this can lead to reasons your car key is not working properly.

It may seem less important, but the reasons your car key is not working could stem from the duplication process. This duplication can impact how your key functions. In a few scenarios, you will find that your car key does not work simply because of the difference between the copy and the original.

Having a duplicate is often a more affordable option than getting a new key cut to code. However, this is not always the best scenario for your safety.