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Car Key Repair – How to Fix a Dead Remote Car remotes are an excellent convenience for drivers. They can unlock doors, open trunks and even start the car. But, these remotes sometimes cease to function at uninviable times. If you notice that your key fob is no longer working, try a few quick fixes before heading to the dealer. These steps could save you money. Keyless Entry System There's no need to search for keys in your pockets or purse. Just walk to your vehicle, press the button on the keyfob, and the doors will unlock and the engine will start. It's an easy feature that makes driving a car more enjoyable and secure. The keyless entry system, as any other device, may be damaged through repeated use or by other causes. If you're having problems with yours, you can either visit the dealer or call a locksmith. Keyless entry systems work by sending radio signals and then searching for the response signal from a key fob. If the system is able to recognize the signal, the vehicle's doors are opened and the onboard computer is activated. Some systems have an additional receiver in the trunk of the car that opens it automatically when you waggle your foot underneath it. Each key fob is assigned an unique identification code by the manufacturer. The fob is programmed by an exclusive process known as “programming”. This typically involves turning the ignition of the vehicle several times in a certain sequence and may also require pulling or pushing various buttons and levers or taking out fuses. Once a key fob has been programmed into your car's keyless system it transmits a digital identification code and a function code to instruct the car to (lock the trunk, unlock it or open the trunk). The car's receiver verifies the transmitter's identity through an authentication and encryption process. The computer in the car will allow the vehicle to be opened and start the engine if it is authenticated. A skilled criminal could snoop and use the code sent between the keyfob and the vehicle. This would require a specific device to record the transmission and then retransmit it later when the system isn't expecting it. To prevent this from happening, most keyless entry systems rely on a method called rolling code, which ensures that each new transmitter signal received by the car has a different counter than the previous one. Batteries The most frequent cause of car remotes key fobs not working is the battery is dead. It's an easy and cheap fix in the event that you have a spare key fob on hand to replace the old one with. Luckily, most fobs use traditional watch-style batteries which are sold in hardware stores or big-box retailers for $10 or less. You can find directions to disassemble the key fob on the internet or in your car's manual. After you've removed your battery, make sure not to damage any circuits or antennas inside the case. They're likely to hold the key fob's programming to your car's specific model, and messing with them can cause it to become impossible to program (and likely to fail). If you have to move the key fobs, be cautious. Certain key fobs might have fasteners that can easily pop out and scatter key fob pieces across your living space. The case of most key fobs is equipped with a single screwdriver hole. To open it, you can make use of a pry tool. But, to start by putting the tool around the outer edge of the case, just as you would peel an apple or orange. Be careful not to apply too much pressure since the case of the key fob is typically made of plastic, and it is prone to break or crack when you exert too excessive force. When you're ready for replacing the battery, make sure to match its size and type to the key fob. Some key fobs have two batteries while others only need one. A bad battery could make your remote key fob useless. If the issue persists it is possible to try again using your key fob after installing the new battery. If not then you'll need to figure out whether your key fob is suffering from an issue that is more complex and requires professional diagnosis and repair. If this is the case, you could need to have it reprogrammed by a dealer, or you may need to purchase a replacement key fob entirely. Buttons The buttons on your key fob are pretty small, and they're packed with delicate electronic components. It's not a surprise that they will fail from time-to-time. The good news is that when your car's key button stops functioning, there's usually something you can do to fix it yourself. The most frequent reason why the car remote stops working is due to dirt or crud has gotten trapped between the buttons. To clear this up remove the batteries and scrub each button using a cotton swab that has been that has been dipped in alcohol rubbing. Be sure to dry them completely before reinstalling batteries. remote key fob repair that your key fob is damaged in any way, for example, being dropped on concrete or accidentally scratched. If this is the case using a different key fob to check its functionality could reveal that the one you have been damaged and has to be replaced. Another possibility is that the door lock sensor in your vehicle isn't working anymore. This sensor is a small metal component attached to the key fob's door lock button. It's not common for it to fail due to weather conditions or long usage. To reset the sensor simply press your key button several times without locking or unlocking your doors to reset it. If all else fails, you can always check the functioning of the spare key by attempting to lock and unlock your doors with it. If the spare key does not work, it may be necessary to find an 24 hour locksmith that can offer automobile key repair in order to make your remote work again. If your car's key fob is working but still not locking or unlocking the vehicle, you can try reprogramming your computer system. If automotive key repair 've used the same key fob a while, it may need to be reprogrammed every few months to continue to work with your vehicle. It's not the most ideal solution, but it's better than having to buy a new remote.