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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 engine. But, these remotes sometimes cease to function at uninviable times. Before you head to the dealer, consider some quick fixes 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 purse or pockets. Just walk up to your car, press the button on the keyfob, and the doors will unlock and the engine will get started. It's a simple feature that makes driving a car more enjoyable and safe. But, like all devices that has a keyless entry system, the keyless entry system may be damaged by repeated use or because of other reasons. If you've encountered issues with your keyless entry system, there are two options: visit the dealership or contact an emergency locksmith in your area. The way that a keyless entry system operates is by sending out radio signals and then searching for a corresponding response signal from the key fob. If the system is able to recognize the signal, it triggers to unlock the car doors and also activate the computer onboard. Some systems have an additional receiver in the car's trunk that opens automatically when you move your foot under it. Each key fob is given an individual digital identification number by the manufacturer. The fob is programmed using a proprietary process called “programming”. This involves turning on the ignition of the vehicle repeatedly in a certain sequence, and could require pushing or pulling buttons or levers or levers or even removing the fuse. Once the key fob is programmed into the keyless system of your car, it transmits a digital identity code and a function code to instruct the car to (lock the trunk, unlock it or open the trunk). The car's receiver verifies that the transmitter is who it claims to be using an authentication and encryption procedure. The onboard computer will allow the vehicle to be opened and start the engine when it is authenticated. A clever criminal could intercept and use the code transmitted between the keyfob and the vehicle. car key repairs would require the use of an instrument that records the transmission, and then retransmits it later when the system doesn't expect it to. Most keyless entry systems utilize a rolling code method to stop this. This ensures that each 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 the car remote to not function. It's a cheap and easy fix when you have a spare key fob on your desk to replace the old one with. Ongoing are powered with watch-style batteries that are available at big-box stores or hardware stores for less than $10. A quick search of the internet or your vehicle's owner manual should provide instructions on how you can disassemble your key fob and replace the battery. Once you've removed the battery, be sure not to disturb any circuits or antennas inside the case. They're likely to be holding the key fob's program to your specific car and any disruption to them will render it unprogrammable (and probably not work). If you must move them, do it slowly, as some key fobs have fasteners that can easily pop open and scatter key fob parts all over your living room. The case of a majority of key fobs is equipped with a single screwdriver hole. To open it, you'll need to use a tool to pry it open. To begin, wedge the pry tool along the outside edge of the case as you would peel an orange or apple. Don't apply too much pressure since the case of the key fob is generally made of plastic, and is susceptible to breaking or cracking when you exert too excessive force. Be sure to match the size and style of battery to the key fob when you replace it. Certain fobs require two batteries, whereas others have just one. The incorrect battery could make your remote key fob useless. After the new battery has been put in place, try using your key fob again to see if it solves your problem. If not, you'll need to determine whether your key fob is suffering from an issue that's more complex that requires professional diagnosis and repair. You may have to have your key fob reprogrammed at the dealer or purchase another one. Buttons The little buttons on your key fob are pretty tiny, and packed with delicate electronic components. It's not a surprise that they will fail from time-to-time. The good news is that when your car's key button isn't working, there's usually something you can do to fix it yourself. The most common reason a car remote key stops working is due to dirt or crud has been trapped between the buttons. To clear this up take care to remove both batteries and scrub each button by using a cotton swab, that has been dipped in alcohol rubbing. Make sure you dry the batteries completely before reinstalling them. It's possible that your key fob was damaged in any way, for example, being dropped on concrete or accidentally scratched. If this is the situation, you can check the function of your key fob using a different one. Another possibility is that the door sensor for your car's lock has stopped working. The sensor is a tiny metal part that is attached to the key fob's door lock button. It's not uncommon for it to break due to weather conditions or long use. To reactivate the sensor just press your key fob a few times without locking or unlocking your doors to reset it. If all else fails you can always test the function of a spare key by opening and locking your doors using it. If the spare key doesn't work, you may need to call a locksmith 24 hours a day who offers automobile key repair to make your remote work again. You can reprogram your computer if your car's key button is working, but it still cannot lock or unlock your vehicle. But keep in mind that if you've used the same key fob for some time, it's going to need to be programmed each few months to ensure it is working properly with your vehicle. It's not the ideal situation, but it's better than having to replace your remote completely.