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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. However, they can cease to function at uninviable times. If you notice that your key fob is not working, you can try a few fixes before heading to the dealer. These suggestions could save you money. Keyless Entry System You don't have to look for keys in your pockets or purse. Just walk up to your vehicle, press the button on the keyfob, and the doors will be opened and the engine will get started. It's a simple feature that makes driving a car more relaxing and safe. how to repair car key fob , like any other device, could be damaged through repeated use or other causes. If you're having problems with yours, you can either visit the dealer or phone an locksmith. The way that a keyless entry system functions is by sending radio signals, and then searching for a corresponding response from the key fob. If the system recognizes the signal, the car's doors are opened and the onboard computer is activated. Certain systems include an additional transmitter in the trunk of the car which can be opened when you put one foot underneath it. Each key fob comes with an unique digital identification code that is assigned by the manufacturer. The fob is programmed by a proprietary process called “programming”. This typically involves turning the ignition of the car multiple times in a particular sequence and may also involve pushing or pulling different buttons and levers, or removing fuses. Once the key fob is programmed into your car's keyless system, it transmits a digital identity code and a function code to tell the car what to (lock the trunk, unlock it or open the trunk). The car's receiver confirms the identity of the transmitter through an authentication and encryption process. If it is authorized, the onboard computer unlocks vehicle and begins the engine. A clever criminal could intercept and use the code transmitted between the keyfob and vehicle. This would require a special device to record the transmission and then retransmit it when the system isn't expecting it. Most keyless entry systems use rolling codes to prevent this. This ensures that every new transmitter signal received by a vehicle has a counter that differs from the previous one. Batteries A dead battery is the most frequent reason for car remotes not to function. If you have an extra key fob it's a low-cost and simple fix. Most fobs are powered by watch-style batteries that are available at big-box stores or hardware stores for less than $10. A quick search on the internet or in your vehicle's owner's manual should give you instructions on how to take apart your key fob and replace the battery. Be careful not to damage any circuits or antennas inside the case after you've removed your battery. They are likely holding the key fob's programming to your specific car and any disruption to them can cause it to become impossible to program (and likely to fail). If you must move the key fobs, be cautious. Some key fobs may have fasteners that can easily open and scatter key fob pieces all over your living space. The case of the majority of key fobs has one screwdriver hole. To open it, you can make use of a pry tool. But, to start you must push the tool around the outer edge of the case like you would do when peeling an orange or apple. Don't apply too much pressure, as the case of the key fob is typically made of plastic and can crack or break if you apply too excessive force to it. Make sure you match the size and type of the battery to the key fob when replacing it. Some key fobs come with two batteries while others require one. The wrong battery could cause your remote to become useless. After the new battery is installed, test your key fob again to see if the battery has fixed your issue. If not it, you'll have to determine if your fob has an issue that is more complex and requires professional diagnosis and repair. You may have to have the key fob reset at the dealer or purchase another one. Buttons The buttons on your key fob may be small however they're packed with electronic components. It's not surprising that they will occasionally fail. The good thing is, when your car's key button 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 have stuck between the buttons. To fix this, remove the batteries carefully and clean each button using the help of a cotton swab which has been submerged in rubbing alcohol. Be sure to dry them completely before reinstalling batteries. It's possible that the key fob was harmed by accident, such as being dropped on concrete, or perhaps scratched by something sharp. If this is the scenario, you can test your key fob's functionality by using a different one. The door lock sensor may have been unable to function in your vehicle. It's a tiny metal piece that is attached to the door lock button on your key fob, and it's not unusual for the sensor to break after long use or exposure to weather conditions. Press your key button several times without locking or unlocking your doors. This will reset the sensor. If all other options fail, you can always check the functioning of the spare key by attempting to open and close your doors using it. If the spare key doesn't work, it might be necessary to find a 24-hour locksmith that offers auto key repair to get your remote working again. You can change the settings on your computer if your car key button is working but cannot lock or unlock your vehicle. If you have had the same key fob for a time, it might need to be reprogrammed every couple of months to continue working with your vehicle. It's not an ideal situation, but it's better than having to replace your remote entirely.