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Modern car remotes are useful and convenient, but can be frustrating if they stop functioning. Fortunately, there are quick fixes that will usually get them back up and running.
First, you should replace the battery. Most fobs use lithium coin cells, which are affordable and easily accessible.
Broken Electronics
The remote car key you have an internal electronic circuit board that transmits and interprets signals to your vehicle. The key fob will stop working if this board is damaged. Damage to the receiver or transmitter will require an auto-locksmith who is a professional or a car key repair cost dealer.
The majority of remote key fobs utilize lithium ion coin batteries that have a long lifespan, but they won't last for a long time. If you've been using batteries for a long period of time replacing them is likely to solve the issue. If you've been using your remote fob for a long time and you're surprised to discover that the buttons don't respond in any way, even if the batteries are fresh. The buttons on your keyfob will be subjected to a lot jostling and may break or become inactive with time. If this is the case removal of the buttons and cleaning them prior to reseating them will often resolve your issue.
If the buttons on your remote aren't responding, you may have to change the programming to match your car's system. This is typically done by turning the key in the ignition several times with the doors closed. The method will vary based on your car's make and model, but you can find instructions online or contact a professional for assistance.
If the key fob is made of plastic you can take off the cover by pulling it open. Be careful not to damage the buttons or other internal components. This can be done with needle-nosed pliers that have longer tips. They are able to easily grasp small parts. Lubricating the pliers with super glue, melted tallow, or putty will help them hold delicate parts. It's also a good idea to employ an automotive locksmith do this, since improper techniques can damage the electronic components within. The plastic can be broken when you attempt to remove the fob with force. It's also possible that any buttons connected to it could break off accidentally if you forcefully pry it apart.
Faulty Transponder Chip
If you've managed to start your car with the remote key, but you're not able to do it ever again, it could be a sign of a problem with the transponder chip. This is because your key relies on this tiny electronic component to communicate with the immobilizer system. It transmits a signal to the system that your key is valid and you are capable of starting the engine. If the chip doesn't correctly transmit this signal, the immobilizer will disable your vehicle.
This issue is most frequent in older vehicles however, it can happen in newer ones as well. This is because the transponder chip can wear out over time. It is possible to have a car locksmith replace this part of your key, however it can be costly.
In certain cases, the chip in your key could be dead. If this is the case, it will require replacement by a dealer. This is the most expensive but necessary way to get your vehicle back on the road.
The other possibility is that the chip inside your key has been damaged that means it no longer works properly with the immobilizer system. This can happen when the battery is replaced or when there is physical damage to the key. A Mesa auto locksmith can fix this issue, but you may need to visit the dealership to have your key programmed.
If you're experiencing issues with your remote key you should first try a backup. If this doesn't resolve the issue, you can disassemble your key fob to examine it visually. Make sure that no buttons appear to be broken or broken. These parts see frequent use and may be jostled loose over time. It is recommended to have them welded in place by a professional when they're loose. In most instances, this will restore your key fob's functionality. This is particularly applicable to keys that were accidentally inserted into the wrong ignition lock.
Damaged Battery
If you've tried a fresh battery and the key fob is still unable to function, there could be other issues. Fobs may be damaged by water, dropping them or stepping over them, and internal connections, such as those that connect the battery terminals inside the remote, could be damaged or broken. You may need to reprogram your key fob if don't have a spare of the same model and type.
Modern key fobs should be programmed to match the vehicle to ensure that only you are able to unlock the car doors. This is a vital step to safeguard your vehicle and to prevent others from using your key fob to gain access to your vehicle or cause electrical system issues. Certain engine error codes, or even normal wear-and-tear can corrupt the programming and prevent your key fob from functioning. Professionals with the right equipment can reprogram your key fob correctly.
It's possible that the problem is in the buttons, which is a much easier fix than replacing the entire key fob. Key fobs typically have rubberized buttons that are tossed around constantly and can break or become loose. If you are able to see that the buttons aren't damaged you might try manually adjusting them.
Open the key fob to inspect it, but be cautious. Certain fobs do not have an easy release mechanism, so you may require a small screwdriver or other tool to pry them apart. Others are sealed and can't be opened without special tools, so you'll likely need to go to a dealership to have it opened professionally. If you have an extra key fob for the same model and brand use of it to start your car's programming mode. Depending on your car this could mean closing and locking the doors, switching the lights and other electronics off and on and pressing a certain set of buttons in a particular order.
Failing Buttons
If your key fob has buttons that do not work or need to be pressing very hard in order to function, it could be because of mechanical damage. Dropping the key fob on concrete or accidentally hitting one of the buttons with a sharp object could affect how well it works. If this is the case you'll need to disassemble the key fob and examine it carefully to check whether any of the buttons appear be damaged or out of place. A locksmith can fix it for you if this is the case.
Failing buttons can also be due to dirt or crud that is trapped between the buttons. You should clean your key fob using an swab of cotton that has been submerged in alcohol. It is possible to clean the surface on the keys repair. It is also important to determine if the problem is with the locks of your car or the key repair car fob itself. If you don't have an additional key fob to test, you might consider trying the keys on another vehicle to determine if they work also.
The condition of the battery will determine whether or not you have to change the programming of the key fob. If your key fob is unable to function after replacing the batteries, it probably indicates that the battery's terminal contacts are damaged. You can also deprogram your electric key fob by pressing the buttons too many times when you're out of range or disconnecting your car's battery.
If the key fob doesn't work after replacing the battery you must have it reprogrammed for your car. It will depend on the specific car model, but generally you'll have to lock and unlock the doors manually, insert the key into the ignition, change it to accessory, and press the remote that is wireless. Usually the interior and exterior lights will flash if this is successful. It is possible to test the key fob in order to verify that it was successfully programmed. In rarer cases, the key fob may not function due to a problem with the door lock key repair near me.