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Car Key Repair – How to Fix a Dead Remote Car remotes offer great convenience to drivers. They can unlock doors, open trunks, and even start the car. These remotes are prone to malfunction at the most inconvenient of times. Before you head to the dealer, consider some quick fixes in case your key fob isn't working. These tips could save you money. Keyless Entry System You don't have to look for keys in your purse or pockets. Simply walk up to your car, push the button on the keyfob, and the doors will unlock and the engine will get started. It's a convenient feature that has made the experience of car driving more enjoyable and more secure. But just like any device it's possible that the keyless entry system can fail due to repeated use or because of other reasons. If you have problems with your system, you can either visit the dealer or phone an locksmith. A keyless entry system operates by sending radio signals and then searching for the response signal from a key fob. If the system is able to recognize the signal, it triggers to unlock the vehicle doors and activate the computer onboard. Certain systems have a second transmitter on the trunk of the car that opens when you move a foot under it. Each key fob is given an individual digital identification number by the manufacturer. The fob is programmed with a proprietary process called “programming”. This involves turning the ignition of the car repeatedly in a certain sequence. It may also require pushing or pulling levers or buttons or even removing the fuse. Once a key fob is programmed to your car's keyless entry system it transmits its digital identity code as well as a function code that tells the car what to do (lock in, unlock or open the trunk). The receiver in the car confirms that the transmitter is the person it claims to be through an authentication and encryption process. If it's authorized the computer on board unlocks the vehicle and then starts the engine. There are concerns that a criminal with a sly approach could intercept the code that's transmitted between the key fob and the car. This would require the use of a device that records the transmission, and then retransmits it when the system doesn't anticipate it to. Most keyless entry systems use a rolling code method to combat this. This ensures that every new signal from a transmitter received by a car has a counter that is different from the previous one. Batteries The most frequent cause of car remotes key fobs not working is a dead battery. If you have an extra key fob it's a cheap and easy fix. Luckily, most fobs use standard watch-style batteries that are available in hardware stores or big-box retailers for less than $10. A quick search on the internet or your vehicle's owner's manual will provide directions on how you can disassemble the fob that you have been using and swap out the battery. Once you've removed the battery, be careful not to disrupt any antennas or circuits within the case. If car key repairs near me do this the key fob will become unprogrammable and will not function. If you must move the key fobs, be careful. Some key fobs may come with fasteners that are able to pop out and scatter key fob pieces across your living space. Most key fobs come with a single hole for the screwdriver or another pry tool to pop open the case, but it's a good idea use your tool to wedge it around the outside of the case first, as if you were peeling an apple or orange. Be careful not to apply too much pressure since the case of the key fob is generally composed of plastic and it is prone to break or crack with too excessive force. Make sure you match the size and style of battery to the key fob when replacing it. Some key fobs have two batteries while others need one. A bad battery could render your remote keyfob useless. After the new battery has been put installed, test your key fob for the second time to see if it solves the issue. If this fails, you will be required to determine if your fob is experiencing a more complex issue that requires a professional diagnosis. If this is the case, you may need to have it changed by a dealer or buy a replacement key fob entirely. Buttons The buttons on your key fob could appear small but they're loaded with electronics. It's not surprising that they'll fail from time-to-time. The good news is, if your car key button stops functioning, there's usually something you can do to fix it yourself. The most common reason the car remote stops working is because dirt or crud have trapped between the buttons. To remove this obstruction, carefully remove both the batteries and clean each button with a cotton swab that has been dipped in alcohol rubbing. Be sure to dry them thoroughly before installing the batteries. It's possible that the key fob has been damaged somehow, perhaps dropped on concrete or unintentionally scratched by a sharp object. If this is the situation, you can check your key fob's functionality by using another one. Another possibility is that the door lock sensor in your vehicle isn't working anymore. It's a tiny metal part that's connected to the door lock button on your key fob, and it's not unusual for the sensor to break following prolonged usage or exposure to harsh weather conditions. To reset the sensor, simply try pressing your key button several times without locking or unlocking your doors to reset it. If all other options fail, you can always check the functioning of a spare key by trying to lock and unlock your doors with it. If the spare key does not work, it could be necessary to find a 24-hour locksmith that offers car key repair to make your remote work again. If your car key button is working but still not locking or unlocking the vehicle, you may try to re-programme your computer system. If you've used the same key fob for a time, it might require reprogramming every couple of months to continue working with your vehicle. This isn't the best option but it's better than having to replace your remote entirely.