Key fobs have become an essential part of modern driving, offering unmatched convenience in a compact design. From locking and unlocking doors to opening the trunk or starting your car remotely, they streamline everyday tasks. That’s why addressing any issues with your key fob promptly is crucial to maintaining this convenience.
Why is My Key Fob Not Working?
Your key fob may not be working for several reasons. Perhaps the most common is that the battery on it is depleted and needs to be changed. Another common reason is that the key fob is damaged and isn't transmitting the signal as well as it should. Regardless of its problems, it's important to get to the bottom of things so that it works again and you can enjoy the convenience that comes with simply pushing a button versus inserting a key. In some vehicles, there isn't even the option to insert a key any longer, so if your key fob isn't working you could be out of luck.
One user reported an issue where their key fob stopped working for unlocking doors or popping the trunk, but it was still detected and could start the car. In another instance, a user mentioned their key fob neither locked nor unlocked doors, popped the trunk, nor triggered the panic alarm.
How to Fix Your Key Fob
If your key fob isn’t functioning properly, there’s a good chance you can troubleshoot the issue yourself before seeking professional assistance. Here are some steps to help you get it working again:
Replace the Key Fob Battery
The most common reason why your key fob isn't working is a depleted battery. Most key fobs take 2032 lithium coin batteries, which aren't as common as AA or AAA. Noting this, you might not have any spares lying around the house. If you don't, you should be able to purchase them at your local hardware store.
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To change the battery, the easiest quick way to pop the back is to use the metal key in the back and just lightly twist in the opening. To replace the key fob battery, be sure to reference your vehicle owner's manual. Most key fobs can be pried open to access and replace the battery. However, it's important to put the key fob back together properly, or else it may not function right. If you need assistance with a battery change, contact a professional.
As stated above I would start with a new battery for the FOB, that may not fix it but it's the cheapest and easiest fix and you will need a new battery one day anyway.
User Tip: Some users prefer going to a Battery's Plus store to have all their key fob batteries and remote start batteries replaced at once for convenience.
Check for Physical Damage
If you've dropped your key fob one too many times, it may not work properly. Damaged key fobs can have difficulty transmitting the proper signal to your vehicle, which can impact how well it functions. In some cases, you may be able to repair the existing key fob by making sure all the internal parts are in the appropriate position. In other situations, like if the internal circuit board is damaged, the better solution is to replace - rather than repair - the key fob.
Test a Second Key Fob
If you’re lucky enough to have two key fobs for your vehicle and if one isn't working, it makes sense to test the second one to help with your troubleshooting. If the second one is working, now you know that the issue is with the one key fob and not with the vehicle. If both key fobs aren't working properly, there could be more significant electrical issues at play that you need to address.
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Clear Out Any Interference
Key fobs also may not be working properly due to signal interference. If your key fob still works, but only at short distances, interference could be the issue. Test your key fob in areas where there are no tall buildings or other vehicles around. If it's working fine in some locations and not as well in others, the culprit is usually interference.
Reprogram It
Your key fob is only going to work when it's paired with your vehicle. If it loses its paired connection, it won't matter how hard or how often you push the buttons down - nothing will happen. If your key fob is still in good condition and the battery isn't the issue, try reprogramming it. Reference your vehicle owner's manual for instructions on how to reprogram your key fob or make an appointment at your local shop.
If it became unprogrammed it would be completely inoperative.
Disconnect the Car Battery
In some cases, disconnecting the car battery for a short period can help reset the system. One user suggested disconnecting the 12V battery. Another user tried disconnecting the battery for 15 or 20 minutes and then tried the key FOB again.
Backup Slot
If the battery does completely go dead there is a backup slot in the car. This can be in the glove box or the center console. The top has a Passive Antitheft Transponder chip in it that does not need a batter to talk to the car. The car will activate that chip and start if it is in the right spot.
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Understanding the System
When you press the start stop button the R.F.A. sees a voltage signal. This initiates it to operate the interior passive antennas. These antennas send a signal to the key fob. The key fob then sends a signal to the tire pressure module. sends a message to R.F.A. then the t.pm. to the R.F.A.
The panic button communicates with the R.F.A over a dedicated circuit or over the network. The alarm perimeter alarm is controlled by the Body Control Module.
Ford Taurus Remote Key Fob Battery Replacement 2008 - 2019
Visit a Professional Auto Technician
If you're still stumped about why your key fob isn't working and have done all the troubleshooting that you can, your next step should be bringing your vehicle to a professional auto technician. Contact your local shop today to schedule an appointment.
Key Fob Maintenance Tips
Looking to keep your key fob working better for longer? Follow these tips:
- Change the battery every one to two years to maintain the strong signal from the key fob to the vehicle.
- Clean the exterior of the key fob frequently to prevent dirt and debris from entering the assembly. This is best done using a soft, damp cloth. You can also clean the internal components. That's best done with a cotton swab and rubbing alcohol.
- Try not to expose your key fob to extreme cold or heat. This can lead to premature battery failure and poor overall functionality.
- Consider storing your key fob in a protective case, much like you do with your phone. This can help prevent scratches and damage that could impact the functionality.
- Don't let it get wet. Moisture and key fob components don't mix. It's another good reason to have a protective case on your key fob in case you drop it into a puddle or snowbank.
By following these troubleshooting steps and maintenance tips, you can keep your Ford Taurus key fob in optimal working condition.