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Car Key Repair – How to Fix a Dead Remote Car remotes are a great convenience to drivers. They can unlock doors, open trunks, and even start the car. These remotes can stop working at the most inconvenient instances. Before you head to the dealer, consider some quick solutions if your key fob stops working. These suggestions could save you money. Keyless Entry System You don't have to look for keys in your pockets or purse. Simply walk up to your car, press the button on the keyfob and the doors will open and the engine will get started. It's a simple function that makes driving a car more relaxing and safe. But just like any device that has a keyless entry system, the keyless entry system could break from frequent use or due to other factors. If you've had issues with yours, you have two options: Visit the dealership or contact the local locksmith. Keyless entry systems work by sending radio signals and then looking for the response signal on the key fob. If the system is able to recognize the signal, it triggers to unlock the car doors and activate the onboard computer. Some systems include an additional receiver in the trunk of the car, which opens automatically when you put your foot on it. Each key fob is equipped with a unique digital identification code that is given by the manufacturer. A specific process of technology called “programming” is used to set the fob up to work with the specific car's system. This usually involves turning on the car's ignition multiple times in a particular sequence and may also involve pushing or pulling various levers and buttons or the removal of fuses. Once a key fob is programmed to the vehicle's keyless entry system it transmits the digital identity code along with an operation code that tells the car what to do (lock in, 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. The onboard computer will allow the vehicle to be opened and start the engine when it is authorized. A skilled criminal could snoop and then use the code that is transmitted between the keyfob's and the vehicle. This would require a device to record the transmission then retransmit it later in the event that the system doesn't anticipate it. Most keyless entry systems utilize the rolling code method to stop this. This ensures that every new transmitter signal received by a car has a counter that is different from the previous one. Batteries A dead battery is the most frequent reason for the car remote to not function. key fob repair 's a cheap and easy fix in the event that you have a spare key fob on in your possession to replace the previous one with. Most fobs are powered with watch-style batteries that can be purchased at big-box stores or hardware stores for less than $10. A quick search of the internet or your car's owner's manual should give you instructions on how you can disassemble your key fob and replace the battery. Be careful not to harm any of the circuits or antennas within the case after you've removed the battery. If you mess with them, the key fob will be unprogrammable and won't work. If you need to move key fobs, be careful. Some key fobs may have fasteners that can easily open and scatter key fob pieces across your living space. The case of the majority of key fobs has one screwdriver hole. To open it, use a pry tool. To begin you must push the tool around the outer edge of the case like you would do when peeling an orange or apple. Do not apply too much pressure as the case of the key fob is generally constructed of plastic and can crack or break when you apply too excessive force. Be sure to match the size and style of battery to your key fob when you replace it. Certain fobs require two batteries, whereas others have just one, and the wrong battery can quickly make your key fob remote useless. If the issue continues, you can try again using your fob's key after installing the new battery. If this fails you'll be required to determine if your fob is experiencing something more complicated that requires a specialist diagnosis. You may need to have your key fob reset at the dealer or purchase a new one. Buttons The tiny buttons on your key fob are small, and are packed with delicate electronic components. It's not a surprise that they'll occasionally fail. The good news is that in the event that your car's keypad fails to function, there's typically something you can do to fix it yourself. The most common reason the car remote stops functioning is due to dirt or crud has been stuck between the button. To get rid of this issue, take off the batteries in a careful manner and scrub each button with a cotton swab that has been submerged in the rubbing alcohol. Be sure to dry the batteries completely before reinstalling them. It's also possible that the key fob was harmed in some way, possibly dropped on concrete, or perhaps damaged by something sharp. If this is the case, using a different key fob to check its functionality may reveal that yours has been damaged and has to be replaced. The door lock sensor might have stopped working in your car. It's a tiny metal component attached to the key fob's door lock button. It is not unusual for it to break due to weather conditions or long use. To activate the sensor again simply press your key button several times without locking or unlocking your doors to reset it. If all else fails, you can always test the functionality of a spare key by unlocking and locking your doors using it. If the spare key does not work, it may be necessary to find a 24-hour locksmith that offers car key repair to make your remote work again. If your car's key fob is working but still not locking or unlocking the vehicle, you may try reprogramming your computer system. But keep in mind that if you've had the same key fob for a long time, it's going to need to be programmed every few months to ensure that it is working properly with your vehicle. It's not ideal, but it is better than buying a new remote.