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Car Key Repair – How to Fix a Dead Remote The car remotes are a great convenience for drivers. They can unlock doors, open trunks, and even start the car. However, they may cease to function at uninviable times. Before you head to the dealer, consider some quick fixes if your key fob stops working. These tips could save you money. Keyless Entry System You don't need to search for keys in your purse or pockets. Simply walk up to your vehicle, press the button on the keyfob, and the doors will open and the engine will start. It's a practical feature that has made the experience of car driving more enjoyable and more secure. The keyless entry system, just like any other device, can be damaged by repeated use or by other causes. If you are having issues with yours, you may either go to the dealer or contact a locksmith. The way a keyless entry system works is by releasing radio signals, and then searching for a corresponding response from the key fob. If the system recognizes the signal, the car's doors are unlocked and the onboard computer is activated. Certain systems include another transmitter located in the trunk of the car which opens it when you waggle a foot under it. Each key fob is given a unique digital identification code by the manufacturer. The fob is programmed by a proprietary process called “programming”. This involves turning the ignition of the car repeatedly in a certain sequence, and may also require pushing or pulling buttons or levers, or even removing the fuse. Once a key fob has been programmed to your car's keyless entry system it transmits its digital identification code along with a function code that tells the car what to do (lock in, unlock or open the trunk). The car's receiver checks the authenticity of the transmitter by an authentication and encryption process. The computer in the car will allow the vehicle to be opened and start the engine if it's authenticated. A skilled criminal could snoop and use the code transmitted between the keyfob and vehicle. This will require an instrument 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 transmission signal received by a vehicle has a counter that differs from the previous one. Batteries The most frequent cause of a car remote key fob not working is an inoperative battery. If you have an extra key fob it's a low-cost and simple fix. Fortunately, most fobs utilize traditional watch-style batteries which are available in hardware stores or big-box retailers for less than $10. You can find instructions to disassemble your key fob by searching the internet or in your vehicle's manual. After you've removed your battery, make sure not to disrupt any of the circuits or antennas in the case. If you make a mess of them the key fob could be unprogrammable and won't function. If you have to move the key fobs, take care. Some key fobs may have fasteners that can easily open and scatter key fob pieces all over your living space. The majority of key fobs have one hole that allows a screwdriver or other pry tool to open the case, however it's a good idea put your tool on the outside of the case first, as if you were 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 when you exert too excessive force. Make sure you match the size and style of the battery to the key fob when replacing it. 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 once more to see if it fixes your problem. If it doesn't, you'll need to determine whether your device has an issue that is more complex and requires a professional diagnosis and repair. You may have to have the key fob reprogrammed by an authorized dealer or purchase another one. Buttons The tiny buttons on your key fob are pretty tiny, and packed with delicate electronics. car key immobiliser repair 's not a surprise that they're destined to fail from time to time. car key immobiliser repair is, when your car's key button isn't working, there's usually something you can do to fix it yourself. One of the most frequent reasons a car key remote stops working is due to dirt or dust that has become lodged between the buttons. To get rid of this issue, take off the batteries carefully and scrub each button with an abrasive that has been submerged in ruby alcohol. Make sure to dry the batteries completely before reinstalling them. It's possible that your key fob was damaged in some way, like being dropped on concrete or accidentally scratched. If this is the case, you can test your key fob's functionality by using a different one. Another possibility is that the door sensor for your car's lock isn't working anymore. The sensor is 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 extended usage. Press your key button several times without locking or unlocking your doors. This resets the sensor. If all else fails, you can always test the functionality of a spare key by unlocking and locking your doors with it. If the spare key doesn't work, it may be necessary to find a 24-hour locksmith that offers automobile key repair in order to get your remote operating again. You can reprogram your computer if your car's key fob works but cannot lock or unlock your vehicle. If you have had the same key fob a time, it might need to be reset every couple of months to to work with your vehicle. It's not an ideal situation but it's better than having to replace your remote completely.