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Car Key Repair – How to Fix a Dead Remote Car remotes are a great convenience for drivers. They can unlock doors, access trunks, and even start the engine. These remotes are prone to malfunction at the most inconvenient of times. Before you go to the dealer, you can try a few quick fixes when your key fob stops working. These steps could save you money. Keyless Entry System Rather than needing to fumble around with keys in your purse or pocket Instead of fumbling around with keys in your purse or pocket, you can stroll up to your car, push a button on the key fob and then unlock the doors and start the engine. It's a practical feature that has made the world of driving a car more enjoyable and more secure. However, just like repair key The Key Lab that the keyless entry system could fail due to repeated use or due to other factors. If you have problems with your system, you can either go to the dealer or contact an locksmith. The way that a keyless entry system works is by releasing radio signals, and then searching for a response signal from the key fob. If the system can recognize the signal, it will trigger to unlock the vehicle doors and activate the onboard computer. Some systems have a second transmitter on the trunk of the car which opens it when you waggle your foot beneath it. Each key fob is given an unique identification code by the manufacturer. A proprietary technical process called “programming” is used to set the fob up with a specific car's system. This requires turning the ignition of the vehicle several times in a specific sequence, and could require pulling buttons or levers, or removing fuse. Once a key fob has been programmed into your car's keyless system it transmits a digital identity code and a function code to instruct the car on what to do (lock or unlock the trunk). The receiver in the car confirms that the transmitter is who it claims to be using an authentication and encryption process. The onboard computer will unlock the vehicle and start the engine if it is authenticated. A clever criminal could intercept and use the code transmitted between the keyfob's and the vehicle. This would require the use of a device that records the transmission and then transmits it again when the system doesn't expect it. Most keyless entry systems utilize rolling codes to stop this. This ensures that every new signal from a transmitter received by a vehicle has a counter that differs from the previous one. Batteries A dead battery is the main reason for the car remote to not work. If you have an extra key fob it's a low-cost and simple fix. Most fobs are powered with watch-style batteries, which can be purchased at big-box stores or hardware stores for less than $10. You can find the steps to disassemble the key fob on the web or in your vehicle's manual. Be careful not to damage any of the circuits or antennas within the case after you've removed the battery. They're likely to be holding the key fob's programming to your particular car and any disruption to them will render it impossible to program (and probably not work). If you have to move the key fobs, take care. Certain key fobs could have fasteners which can easily be removed and scatter key fob pieces across your living space. The majority of key fobs have one hole that can be used with an screwdriver or similar tool to open the case. However, it's a good idea wedge your pry tool around the outside of the case first, just as you would peeling an apple or orange. Don't apply too much pressure since the case of the key fob is usually constructed of plastic and it is prone to break or crack when you exert too the force. If you're ready to replace the battery, make sure to match the size and type to the key fob. Some fobs require two batteries, whereas others have only one. The wrong battery can quickly render your remote key fob useless. After the new battery is installed, test your key fob for the second time to see if it fixes your problem. If it doesn't then you'll need to figure out whether your device has an issue that is more complex and requires professional diagnosis and repair. If this is the case, you could need to have it changed by a dealer or purchase a new key fob altogether. Buttons The little buttons on your key fob are pretty small, and are packed with delicate electronics. Therefore, it's not surprising that they're doomed to fail from time to time. 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 frequent reason why the car remote stops functioning is due to dirt or crud have stuck between the buttons. To remedy this, take out the batteries carefully and scrub each button with an abrasive that has been dipped into the rubbing alcohol. Make sure to dry the batteries completely before reinstalling them. It's possible that your key fob is damaged in any way, for example, being dropped on concrete or accidentally scratched. If this is the case using a different key fob to verify its function could reveal that the one you have simply been damaged and needs to be replaced. Another possibility is that the door lock sensor in your vehicle has stopped working. It's a tiny, metal component that's attached to the door lock button on your key fob, and it's not common for this sensor to break after long-term usage or exposure to harsh weather conditions. To reactivate the sensor just press your key button several times without locking or unlocking your doors to reset it. If nothing else works, you can always test the function of a spare key by unlocking and locking your doors with it. If the spare key does not work, you may have to contact a 24-hour locksmith who provides repair of car keys to make your remote work again. If the car key button is working, but it's still not locking or unlocking your vehicle, you can try reprogramming your computer system. If you've had the same key fob a while, it may need to be reset every few months to continue to work with your vehicle. It's not ideal, but it is better than having to buy a new remote.