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Car Key Repair – How to Fix a Dead Remote Car remotes provide a excellent convenience for drivers. They allow you to unlock doors, gain access to trunks and even start the engine. Remotes that work with these remotes may stop working at the most inconvenient of times. If you notice that your key fob no longer working, try a few fixes before going to the dealer. These suggestions could save you money. Keyless Entry System Rather than needing to fumble around with keys in your purse or pocket Instead of fumbling around with keys in your purse or pocket, you can walk to your car, press a button on your key fob and then unlock the doors and start the engine. It's a simple function that makes driving a car more relaxing and secure. The keyless entry system, as any other device, may be damaged through repeated use or by other causes. If you've encountered issues with yours, there are two options: Visit the dealership or call the local locksmith. A keyless entry system operates by sending radio signals, and then searching for the response signal on the key fob. If the system recognizes the signal, it will trigger to unlock the vehicle doors and activate the onboard computer. Certain systems have another transmitter located in the trunk of the car which can be opened when you put your foot beneath it. Each key fob is given an unique identification code by the manufacturer. A specific process of technology called “programming” is used to make sure that the fob is set up to work with the specific car's system. This usually 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 the removal of fuse. Once a key fob has been programmed into the keyless system of your car, it transmits a digital identification code and a function code that tell the car what to (lock, unlock or open the trunk). The receiver in the car verifies that the transmitter is the person it claims to be by using an authentication and encryption procedure. If it is authorized, the onboard computer unlocks the vehicle and begins the engine. A clever criminal could intercept and use the code sent between the keyfob and vehicle. This would require the use of a device that records the transmission, and then retransmits it later when the system doesn't anticipate it. Most keyless entry systems use a rolling code method to stop this. This ensures that each new transmitter signal received by a vehicle has a counter value that is different from the previous one. Batteries A dead battery is the main reason for the car remote to not work. If you have an extra key fob it's a simple and inexpensive fix. Fortunately, the majority of fobs have regular watch-style batteries that can be purchased at hardware stores or big-box retailers for $10 or less. You can find instructions to disassemble your key fob by searching the internet or in your vehicle's manual. After you've removed the battery, be careful not to damage any antennas or circuits within the case. They are likely holding the key fob's program to your specific car and any disruption to them will render it unprogrammable (and most likely not work). If you need to move key fobs, be cautious. Some key fobs may have fasteners which can easily pop out and scatter key fob pieces across your living space. The case of most key fobs has one screwdriver hole. To open Learn Additional Here , you'll need to make use of a pry tool. But, to start you must push the tool around the outer edge of the case, just as you would do when peeling an apple or orange. Be careful not to apply too much pressure, since the case of the fob is usually made of plastic and can break or crack if apply too much pressure to it. When you're ready for replacing the battery, be sure to match the size and style to your key fob. Some key fobs come with two batteries, while others only require one. The wrong battery could make your remote key fob useless. Once the new battery is installed, test your key fob for the second time to see if it fixes your issue. If not then you'll need to figure out whether your device has an issue that is more complex and requires a professional diagnosis and repair. It could be necessary to have your key fob reset at the dealer or purchase a new one. Buttons The buttons on your key fob might appear small however they're packed with electronics. So it's not too surprising that they're destined to fail from time to time. The good news is that if your car key button isn't working, there's usually something you can do to fix it yourself. One of the most common reasons why a car key remote doesn't work is because dirt or grit has become lodged between the buttons. To remedy this, take out the batteries in a careful manner and clean each button using a cotton swab that has been dipped into ruby alcohol. Be sure to dry them thoroughly before installing the batteries. It's possible that the key fob was damaged by accident, such as being dropped on concrete or unintentionally scratched by something sharp. If this is the scenario, you can test your key fob's functionality by using a different one. Another possibility is that the door lock sensor in your vehicle isn't working anymore. It's a tiny metal part that is attached to the key fob's door lock button. It is not unusual for it to break due to weather conditions or long use. Press your key button several times without locking or unlocking your doors. This will reset the sensor. If nothing else works, you can always test the functionality of a spare key by opening and locking your doors with it. If the spare key does not work, you may have to contact a 24-hour locksmith who can repair your car keys to make your remote work again. You can reprogram your computer if your car's key button is working but does not lock or unlock the vehicle. But keep in mind that if you've owned the same key fob for a long time, it will have to be programmed every few months to ensure that it is working properly with your vehicle. It's not optimal, but it's better than having to purchase a new remote.