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remote key repairs – How to Fix a Dead Remote Car remotes offer great convenience to drivers. They can unlock doors, open trunks and even start the car. But, these remotes sometimes stop working at odd times. If you notice that your key fob not working, you can try a few quick fixes before heading to the dealership. 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 car, press the button on the keyfob, and the doors will be opened and the engine will start. It's a convenient feature that has made the world of car driving more enjoyable and more secure. But just like any device that has a keyless entry system, the keyless entry system could fail due to repeated use or because of other factors. If you're having problems with yours, you can either go to the dealer or contact an locksmith. The way a keyless entry system operates is by releasing radio signals and then searching for a response signal from the key fob. If the system detects the signal, the vehicle's doors are opened and the computer on board is activated. Some systems have an additional transmitter in the trunk of the car that opens it when you waggle one foot underneath 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 usually involves turning on the ignition of the car multiple times in a particular sequence, and could include pulling or pushing different buttons and levers, or taking out fuse. Once a key fob has been programmed to your specific car's keyless entry system, it transmits its digital identification code, along with a function code that tells the car what to do (lock, unlock or open the trunk). The receiver in the car confirms that the transmitter is the person it claims to be by using an authentication and encryption process. If it's authorized, the onboard computer unlocks vehicle and starts the engine. A clever criminal could intercept and then use the code that is transmitted between the keyfob and vehicle. This will require an instrument that records the transmission and then transmits it again when the system doesn't expect it. To prevent this from happening issue, the majority of keyless entry systems use the rolling code method that guarantees that each new transmitter signal received by the vehicle has a different counter than the previous one. Batteries A dead battery is the most frequent reason for a car remote to not function. It's a simple and inexpensive fix in the event that you have an extra key fob on in your possession to replace the previous one with. Fortunately, most fobs utilize regular watch-style batteries that are available at hardware stores or big-box retailers for as little as $10. You can find instructions to disassemble the key fob on the internet or in your car's manual. Once you've removed the battery, make sure not to disrupt any antennas or circuits within the case. They are likely holding the key fob's program to your specific car and tampering with them will render it impossible to program (and probably not work). If you have to move them, do it with care as some key fobs have fasteners that can easily pop open and scatter key fob pieces across your living room. The majority of key fobs have a single hole for a screwdriver or other pry tool to open the case, however it's best to use your tool to wedge it around the outside of the case first, like you were peeling an apple or orange. Do not apply too much pressure, since the fob case is often constructed of plastic and could break or crack if you apply too much force to it. When you're ready to replace the battery, make sure to match its size and type to your key fob. Some key fobs have two batteries while others need one. The wrong battery can cause your remote to become useless. If the issue continues, you can try again with your fob's key after installing the new battery. If it doesn't work, you will be required to determine if your fob is experiencing an issue that is more complicated and requires a professional diagnosis. You may need to have the key fob reset at a dealer or buy a new one. Buttons The buttons on your key fob may be tiny, but they are packed with electronics. It's not a surprise that they will malfunction from time to time. The good news is, when your car's key button isn't working, there's usually something you can do to fix it yourself. The most frequent reason why a car remote key stops working is because dirt or crud have lodged between the button. To fix this, remove the batteries with care and clean each button using an abrasive that has been submerged in ruby alcohol. Make sure to dry the batteries completely before reinstalling them. It's possible that the key fob has been damaged somehow, perhaps dropped on concrete or accidentally damaged by something sharp. If this is the case, you can test the functionality of your key fob by using another one. The door lock sensor could have stopped working in your car. It's a tiny metal part that's connected to the door lock button on your key fob, and it's not common for this sensor to break following prolonged use or exposure to extreme weather conditions. To reset 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 functionality of a spare key by unlocking and locking your doors using it. If the spare key does not work, you may need to contact a locksmith on call 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 works but doesn't lock or unlock the vehicle. Be aware that if you've used the same key fob for a period of time, it's going to need to be programmed every couple of months to ensure that it is working properly with your vehicle. It's not the most ideal solution, but it's better than having to purchase another remote.