Car Remote Key Repair
Modern car remote keys are useful and convenient, however they can be frustrating when they stop functioning. Fortunately, there are quick fixes that can usually get them back up and running.
Replace the battery first. The majority of fobs are powered with lithium coin cells. They are inexpensive and easy to locate.
Broken Electronics
The electronic circuit board in the remote car key transmits and interprets signals to your vehicle. The key fob will stop working in the event that this board is damaged. Damage to the receiver or transmitter will require a professional auto-locksmith or your car dealer.
Most remote key fobs use lithium ion coin batteries which have a decent time-to-life, but won't last for long. Changing the batteries will likely solve your problem, especially those who have had them for a long time. If you've been using your remote fob for a long period of time you may be shocked to find that the buttons don't respond at all, even when the batteries are in good condition. Since the buttons on your key fob get a lot of jostling, they can sometimes fail or cease to function over time. If this is the case, removing the buttons, cleaning them, and placing them back in place will usually resolve the issue.
If the buttons on your remote aren't working, you might have to change the programming to match the system of your car. This is typically accomplished by turning the ignition key several times with the doors closed. This will depend on the make and model of your vehicle, but you can locate the steps on the internet or ask a professional for assistance.
If the key fob is made of plastic, you can remove the cover by pulling it apart. However, be careful not to damage buttons or other internal components. This is best done with needle-nosed pliers which have longer tips. They are able to grasp small components. Lubricating pliers with putty, super glue or melted tallow will help them grasp delicate parts. This is something that an automotive locksmith could do, as incorrect methods could damage the electronics. If you try to forcefully break the fob apart could cause damage to the plastic, and it's also possible to accidentally break any buttons connected to it.
Faulty Transponder Chip
Transponder chips could malfunction if you've previously had the ability to start your car with the remote key but are unable to do so again. This is because the key relies on a tiny electronic component to communicate with immobilizer system. It transmits the signal to the system to inform it that your key is valid and you should be able start your vehicle. If the chip does not properly transmit this message, the immobilizer will disable your vehicle.
This issue is most frequent in older cars however, it can happen in more modern models too. The transponder chip wears down over time. The chip can be replaced by a locksmith for cars however, it can be costly.
In some instances, the chip in your key could be dead. In this instance the dealer will need to replace it. This is the most expensive but necessary way to get your car back on the road.
The other possibility is that the chip in your key has been damaged and it is unable to longer works properly with the immobilizer system. This can occur when the battery is replaced, or it can occur in the event of physical damage to the key. A Mesa auto locksmith can fix this issue, however you may need to go to the dealer to get your key programmed.
If you're having issues with your remote key, you must first try a backup. If this doesn't resolve the issue, you should disassemble the key fob to examine it visually. Check that none of the button appears to be loose or damaged. These parts see frequent use and may be lost over time. If they are loose, it's a good idea to have them soldered back in place by an experienced professional. This can often restore the functionality of your key fob. This is especially true for keys that are accidentally put into the wrong ignition lock cylinder.
Damaged Battery
If you've tried a new battery and the key fob still won't work, there may be other issues. Fobs may be damaged by water, or dropped or dropped on. Internal connections, including those that connect to the battery terminals in the remote, may also be damaged or disconnected. You may need to reprogram your key fob if do not have a spare that is the same type and model.
Modern key fobs need to be programmed to match the car to ensure that only you are able to unlock the car's doors. This is an essential step to protect your vehicle and prevent other people from using your key fob to gain access to your car or cause electrical system issues. Certain engine error codes or wear and tear from normal wear and tear could corrupt the programming and stop your key fob from working. It is essential to have your key fob reset professionally by a professional who is equipped with the appropriate equipment.
It's also possible that the problem is with the buttons and this could be a simpler solution than replacing the entire key fob. Key fobs typically feature rubberized buttons that can be damaged or lose their elasticity over time. If you're able to determine that the buttons aren't damaged you can try adjusting them manually.
It's best to open up the fob that you're using to look at it, but be careful. Some fobs aren't equipped with an easy release mechanism, and you might need a small screwdriver or other tool to pry them apart. Some are sealed and can't be opened with specialized tools, so you'll likely need to bring it to a dealer to have it professionally opened. If you have an extra key fob from the same model and brand you want to use it, try using it to enter the programming mode of your car. This may require you to shut and lock the doors, switch on and off the lights and electronics, and press a series of buttons in a specific order specific to your car.
Failing Buttons
Mechanical damage could be the cause if the buttons on your key fob do not function or require you to press them in a very forceful manner. The key fob's functionality can be affected by dropping it on concrete or accidentally hitting a button with a sharp item. If this happens you'll need to take the key fob apart and examine it carefully to determine whether any of the buttons appear to be damaged or out of place. A locksmith can fix it for you, if that's the case.
Failure of buttons could be caused by dirt or crud trapped between the buttons. It is crucial to clean your key fob frequently using the help of a cotton swab that has been soaked in alcohol. You may need to clean the surface on the keys. It is also important to determine if the issue lies related to your car lock or the key fob. If you don't have an extra key fob to test, you might consider trying the keys on another vehicle to see if they work as well.
The decision of whether or not the key fob should be reprogrammed depends on the condition of the battery. If your key fob fails to operate after you replace the batteries, it most likely means that the battery terminal contacts are damaged. Pressing the buttons on your key fob repeatedly while out of range or disconnecting your car battery can also deprogram an electronic key fob.
If the key fob still not working after replacing the battery, you should get it reprogrammed with the car. It will depend on the specific car model, but you'll generally need to lock and unlock the doors manually. Simply insert the key into the ignition, turn it to accessory, then press a button on the wireless remote. Usually, the exterior and interior lights will light up if this has worked. It is then possible to test your key fob to confirm that it has been successfully programmed with the vehicle. In repair car key remote might stop working due to an issue with the door locks.