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Car Key Repair – How to Fix a Dead Remote The car remotes are a wonderful convenience for drivers. They can unlock doors, open trunks and even start the car. However, they can cease to function at uninviable times. Before you visit the dealer, consider some quick fixes if your key fob stops working. These tips could save you money. Keyless Entry System Instead of having to fiddle around with keys in your purse or pocket Instead of fumbling around with keys in your purse or pocket, you can walk up to your car, push a button on your key fob and then unlock the doors and start the engine. It's a useful feature that has made the world of car driving more enjoyable and safer. However, just like any other device it's possible that the keyless entry system can be damaged by repeated use or due to other factors. If you are having issues with yours, you may either visit the dealer or phone a locksmith. A keyless entry system operates by sending radio signals, and then looking for the response signal on a key fob. If the system can recognize the signal, it will trigger to unlock the car doors and activate the onboard computer. Certain systems have another receiver mounted on the trunk of the car that will open automatically when you put your foot underneath it. Each key fob is given an unique identification code by the manufacturer. A unique process of technology known as “programming” is used to make sure that the fob is set up to work with the specific car's system. This requires turning the ignition of the vehicle repeatedly in a certain sequence, and may also require pulling levers or buttons or removing the fuse. Once the key fob is programmed into your car's keyless system, it transmits a digital identification code as well as a function-code to instruct the car on what to do (lock, unlock or open the trunk). The receiver in the car verifies that the transmitter is who it claims to be using an authentication and encryption process. If it is authorized, the onboard computer unlocks the vehicle and then starts the engine. There are concerns that a clever criminal could intercept the code that's transmitted between the key fob and the car. This would require a specific device to record the transmission and then retransmit it when the system isn't expecting it. To prevent this from happening issue, the majority of keyless entry systems rely on the rolling code method that guarantees that each new transmitter signal received by the car has a different counter than the previous one. Batteries The most common cause of the car remote key fob not working is a dead battery. If you have an extra key fob it's a simple and inexpensive fix. Most fobs are powered by watch-style batteries, which can be purchased at big-box stores or hardware stores for less than $10. car key repairs near me can find directions to disassemble the key fob on the web or in your vehicle's manual. Be careful not to damage any circuits or antennas inside the case after you've removed the battery. They're likely to be holding the key fob's program to your specific car, and messing with them can cause it to become unprogrammable (and likely to fail). If you have to move the key fobs, be cautious. Certain key fobs could come with fasteners that are able to be removed and scatter key fob pieces all over your living space. The case of the majority of key fobs has a single screwdriver hole. To open it, you can use a tool to pry it open. But, to start you must push the tool around the outer edge of the case as you would do when peeling an apple or orange. Be careful not to apply too much pressure, since the case of the key fob is typically constructed of plastic and could break or crack if apply too much pressure to it. If you're ready to replace the battery, make sure to match its size and type to the key fob. Some key fobs require two batteries, while others have just one, and the wrong battery can quickly make your key fob remote useless. If the issue persists then you can try it again with your fob's key after installing the new battery. If this doesn't work you'll need to determine whether your fob is suffering from a more complex issue that requires a professional diagnosis. If this is the case, you could require it to be reset by a dealer or purchase a new key fob altogether. Buttons The buttons on your key fob could be small, but they are packed with electronics. So it's not too surprising that they're likely to fail from time to time. The good thing is, in the event that your car's keypad stops functioning, there's usually something you can do to fix it yourself. One of the main reasons a car key remote stops working is because dirt or grit has accumulated between the buttons. To fix this, remove the batteries with care and scrub each button with an abrasive that has been dipped into ruby alcohol. Be sure to dry them completely before replacing the batteries. It's possible that your key fob has been damaged in any way, for example, being dropped on concrete or accidentally scratched. If this is the case, using a different key fob to verify its function could reveal that the one you have simply been damaged and needs to be replaced. The door lock sensor could have been unable to function in your vehicle. The sensor is a tiny metal part that is attached to the key fob's door lock button. It is not uncommon for it to break due to weather conditions or extended use. To reactivate the sensor just press your key fob a few times without locking or unlocking your doors to reset it. 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 doesn't work, it might be necessary to locate an emergency locksmith who can provide automobile key repair in order to make your remote work again. If the car key button is working, but it's still not locking or unlocking your vehicle, you can try to re-programme your computer system. Be aware that if you've owned the same key fob for a period of time, it's likely to need to be programmed every couple of months to ensure it remains in sync with your vehicle. It's not optimal, but it's better than buying an entirely new remote.