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Car Key Repair – How to Fix a Dead Remote Car remotes offer excellent convenience for drivers. They allow you to unlock doors, gain access to trunks and even start the engine. But, these remotes sometimes cease to function at uninviable times. If you discover that your key fob not working, try a few quick fixes before going to the dealer. These suggestions could save you money. Keyless Entry System Rather than needing to fumble around with keys in your pocket or purse, you can simply walk up to your car, hit a button on the key fob and then unlock the doors and start the engine. It's a simple feature that makes driving a car more relaxing and safe. But just like any device, the keyless entry system may fail due to repeated use or due to other factors. If you're having problems with yours, you can either visit the dealer or call an locksmith. Keyless entry systems operate by sending radio signals and then scouring for a response signal from the key fob. If the system is able to recognize the signal, it will trigger to unlock the car doors and activate the onboard computer. Certain systems have another receiver mounted on the trunk of the car, which will open automatically when you put your foot on it. Each key fob is given a unique digital identification code by the manufacturer. The fob is programmed with a unique process called “programming”. This typically involves turning the ignition of the car repeatedly in a specific sequence. It could also involve pushing or pulling different buttons and levers, or taking out fuses. Once the key fob has been 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 receiver on the car verifies the transmitter's identity 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 requires an instrument that records the transmission, and then retransmits it when the system doesn't expect it to. To help combat this, most keyless entry systems use a method called rolling code that ensures that every new transmitter signal received by the car has a different counter than the previous one. Batteries The most frequent cause of the car remote key fob not working is the battery is dead. It's a simple and inexpensive fix if you have a spare key fob on your desk to replace the old one with. The majority of fobs are powered by watch-style batteries, which can be purchased at big-box stores or hardware stores for less than $10. A quick search of the internet or in your vehicle's owner's manual should give you instructions on how you can disassemble your key fob and swap out the battery. Be careful not to harm any circuits or antennas inside the case once you've removed your battery. They're likely to be holding the key fob's programming to your particular car, and messing with them can cause it to become impossible to program (and most likely not work). If you need to move key fobs, be cautious. Certain key fobs might come with fasteners that are able to be removed and scatter key fob pieces across your living space. The case of most key fobs has a single screwdriver hole. To open it, you can use a tool to pry it open. But, to start, wedge the pry tool along the outside edge of the case like you would peel an apple or orange. Be careful not to apply too much pressure, as the case of the key fob is usually made of plastic, and it is prone to break or crack when you exert too excessive force. If you're ready to replace the battery, make sure to match the size and type to your key fob. Some key fobs require two batteries, whereas others have just one. Using the incorrect battery could render your remote key fob ineffective. If the problem persists then you can try it again with your fob's key after installing the new battery. If this fails, you will have to determine if the fob is suffering from a more complex issue that requires a specialist diagnosis. You may need to have your key fob reprogrammed at an authorized dealer or purchase another one. Buttons The buttons on your key fob may be small but they're loaded with electronics. It's not a surprise that they're doomed to fail from time to time. If your car key button suddenly stops working, you can generally fix it yourself. One of the most frequent reasons that a car key remote fails to function is that dirt or crud has lodged between the buttons. To fix this, remove the batteries with care and clean each button using a cotton swab that has been dipped into the rubbing alcohol. Be sure to dry them completely before reinstalling batteries. remote key repair 's also possible that the key fob was damaged by accident, such as being dropped on concrete or unintentionally scratched by something sharp. If this is the situation, you can check the functionality of your key fob by using another one. Another possibility is that the door lock sensor in your vehicle isn't working anymore. It's a tiny metal component attached to the key fob's door lock button. It's not uncommon for it to break due to weather conditions or prolonged use. To activate the sensor again just press your key button a few times without locking or unlocking your doors to reset it. If nothing else works, you can test the capabilities of a spare by unlocking and locking your doors with it. If the spare key doesn't work, it might be necessary to locate an 24 hour locksmith that can offer automobile key repair in order to get your remote operating again. You can reprogram your computer if your car key fob works but cannot lock or unlock your vehicle. If you have had the same key fob a while, it may require reprogramming every couple of months to continue to work with your vehicle. This isn't the best option however it's much better than having to replace your remote completely.