What causes demagnetization in a key fob?
If your key fob has suddenly stopped working, and you don’t know why, the most likely scenario is that the key fob has been demagnetized. Demagnetization happens when the magnetic field inside the key fob, which is necessary for it to function, has been disrupted. This usually happens when the key fob is exposed to a strong magnetic field, which can occur in a variety of situations. Let’s take a closer look at some of the most common causes of demagnetization in a key fob.
Magnetic Objects
One of the most common causes of demagnetization in a key fob is exposure to other magnetic objects. This can include things like magnets on your fridge, computer, or other electronics, as well as jewelry or other metal objects. If your key fob comes into contact with another magnetic object, the magnetic field inside it can be disrupted, causing it to lose its function. One way to avoid this is to keep your key fob away from other magnetic objects as much as possible.
Medical Devices
Another common cause of demagnetization in a key fob is exposure to medical devices with magnetic fields. This can include things like MRI machines, pacemakers, or other electronic medical devices. If your key fob comes into contact with these devices, the strong magnetic fields they produce can demagnetize the key fob, rendering it useless. If you know you’re going to be in contact with any medical devices with magnetic fields, it’s best to leave your key fob at home.
Extreme Temperatures
Extreme temperature changes can also cause demagnetization in a key fob. If your key fob is exposed to extreme heat or cold, the magnetic field inside it can be altered, making it stop working. This can happen if you leave your key fob in a hot car for too long or if you expose it to freezing temperatures. To prevent this from happening, try to keep your key fob at room temperature as much as possible.
Water Damage
If your key fob gets wet, the magnetic field inside it can be disrupted, causing it to stop working. This is because water can cause a short circuit in the key fob’s electronics or cause corrosion on its battery. To prevent water damage, keep your key fob away from water sources and be careful when using it in rainy weather.
Age and Wear and Tear
Finally, like any electronic device, key fobs can eventually wear out over time, especially with continued use. Over time, your key fob’s magnetic field may become weakened, and it may need to be replaced. If you’ve tried all the other solutions and your key fob still isn’t working, it may be time to invest in a new one.
Testing your demagnetized key fob
Before jumping into fixing your demagnetized key fob, you need to confirm that it is indeed the key fob that has lost its magnetization. One way to test this is by using other fobs to check if they work on the same car. If they work, then it means the problem is with the one that isn’t working.
Another quick way to determine if the key fob is faulty is by using the car manual. In the manual, there is a sequence that you can follow to test whether your fob is working correctly. Follow the instructions and see if the buttons on your fob work. If they don’t, then it’s a clear indication that the key fob is demagnetized.
You can also use a smartphone to check if the key fob is responsive. Open the camera app on your smartphone and point the fob at the camera lens while pressing the buttons on the fob. Look at the camera’s screen and check if you can see white flashes at the end of the fob’s infrared LED light. If you don’t see any white flashes, that means the key fob isn’t sending any signals to the car. It signifies that it might have been demagnetized or that the battery is dead.
Testing your demagnetized key fob is essential to determine if it’s indeed a magnetization issue or if there’s something else that’s the root cause of the problem. Once you’re sure that the key fob is demagnetized, you can proceed to fix the issue using one of the methods below.
How to re-magnetize your key fob using a magnet
If your key fob is not working, it could be because the magnetic strip inside has become demagnetized. This can happen for a number of reasons, including exposure to electronic devices or being dropped on a hard surface. Whatever the cause, the good news is that you can usually fix this problem by re-magnetizing the key fob using a magnet. Here’s how to do it:
Step 1: Find a magnet
You can use any type of magnet for this, as long as it is strong enough to re-magnetize the strip inside your key fob. A good option is to use a standard fridge magnet or a rare earth magnet. If you don’t have a magnet at home, you can easily purchase one online or at a hardware store.
Step 2: Hold the magnet against the key fob
Take the magnet and hold it against the magnetic strip inside the key fob. You should place the magnet on the side of the key fob that has the grooves in it (this is the side that normally sits against the ignition or door lock). It’s best to do this on a flat surface to ensure that the magnet makes maximum contact with the strip.
Step 3: Rub the magnet against the key fob
Now that you have the magnet in place, rub it against the key fob for about 5-10 minutes. Make sure you move the magnet up and down the strip to ensure that it is fully magnetized. You can do this as many times as needed, but generally, 5-10 minutes is sufficient.
Step 4: Test the key fob
Once you have finished re-magnetizing the key fob, it’s time to test it out. Press any button on the key fob and see if it works. If the key fob is still not working, you may need to re-charge the battery or replace it altogether. In some cases, the problem may be with the electronics, in which case you will need to take the key fob to a professional to diagnose and fix the problem.
Step 5: Prevent future demagnetization
If your key fob has become demagnetized, it’s likely that it will happen again in the future. To prevent this from happening, try to keep the key fob away from electronic devices, as these can interfere with the magnetic strip. Additionally, don’t drop the key fob on hard surfaces and avoid exposing it to extreme temperatures.
Re-magnetizing your key fob is a simple and effective way to get it working again. All you need is a magnet and a few minutes of your time. By following these steps, you can save yourself the cost and hassle of having to buy a new key fob.
Using a key fob programmer to fix demagnetization
If your key fob has become demagnetized, you may need to use a key fob programmer to fix the problem. Using a key fob programmer can be a bit more complicated than some of the other methods mentioned in this article, but it is often the most effective way to fix the issue.
First, it is important to understand how a key fob programmer works. Essentially, a key fob programmer is a handheld device that enables you to reprogram your key fob. It does this by sending a signal to the key fob that resets the magnetization. If your key fob is demagnetized, using a key fob programmer may be the best way to get it working again.
Before you start using a key fob programmer, however, you will need to make sure that you have the correct type of key fob. Different key fobs may require different types of programmers, so it is important to do your research and find out what type of programmer you need before you start.
Once you have the correct programmer, you can start the reprogramming process. This will typically involve the following steps:
- Remove the key from the ignition.
- Insert the key into the key fob programmer.
- Follow the instructions on the programmer to reprogram the key fob.
- Once the key fob has been reprogrammed, remove it from the programmer and test it by using it to unlock your car.
It is important to follow the instructions provided with the key fob programmer carefully, as the process may vary slightly depending on the specific make and model of your car. In some cases, you may need to program multiple key fobs at once, so make sure to read the instructions carefully to ensure that you are doing everything correctly.
While using a key fob programmer can be a bit more complicated than some of the other methods mentioned in this article, it is often the most effective way to fix a demagnetized key fob. If you are comfortable with technology and are willing to take the time to read the instructions carefully, using a key fob programmer may be the best way to get your key fob working again.
If you are not comfortable using a key fob programmer, or if you do not have access to one, you may want to consider taking your car to a professional for assistance. A locksmith or auto dealer may be able to help you reprogram your key fob and restore its magnetization, ensuring that it works properly once again.
Overall, if you have a demagnetized key fob, there are several different methods you can try to fix the problem. Whether you choose to use a magnet or a key fob programmer, it is important to take the time to carefully follow the instructions and ensure that you are doing everything correctly. With a bit of patience and persistence, you should be able to restore your key fob to working order in no time.
When to Seek Professional Help for a Demagnetized Key Fob
Now that you have tried some of the DIY solutions for fixing a demagnetized key fob, you may be wondering if it’s time to seek professional help. Here are some signs that indicate it’s time to seek help from a locksmith or a car dealership.
1. Multiple attempts have not fixed the issue
If you have tried some of the solutions discussed earlier, and you still cannot access your vehicle, it could be a sign of a more significant problem. A locksmith or dealership will have the necessary tools and expertise to diagnose the issue and fix it.
2. No response from the key remote
When you press a button on your key fob, you should see a response in the form of a light blinking or hear a beep. If there is no response, it could indicate a problem with the circuit board on the fob. A professional can test the remote’s response and determine if it needs replacement.
3. The key fob has been damaged
If you have accidentally dropped your key fob, it could be the cause of the demagnetization. A locksmith or dealer can check the internal components of the fob and repair or replace any damaged parts to restore its functionality.
4. The car battery is not dead
If the car battery is working correctly but cannot start the vehicle with a key fob, it could be a sign that there is something wrong with the vehicle’s communication system with the fob. A professional can run a diagnostic test to determine the issue.
5. Professional help is warranted
If you feel that you need professional help, go ahead and contact a locksmith or dealership. They have the necessary hardware, software, and tools to diagnose the issue and offer a long-term solution. Since your key fob is an essential component of your vehicle’s security system, it is best to leave the fixes to the professionals.
In conclusion, the demagnetization of a key fob can be frustrating, but there is a solution. Before you seek professional help, try some of the DIY solutions mentioned earlier. However, if you have tried everything and the problem persists, it’s time to seek professional help from a locksmith or dealership.