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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, open trunks and even start the car. However, they can cease to function at uninviable times. If visit the website notice that your key fob is not working, you can try a few quick fixes before heading to the dealer. These tips could save you money. Keyless Entry System Instead of fumbling around with keys in your purse or pocket Instead of fumbling around with keys in your purse or pocket, you can walk to your car, press a button on your 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. The keyless entry system, just like any other device, can be damaged by repeated use or by other factors. If you have problems with your system, you can either visit the dealer or phone a locksmith. The way that a keyless entry system works is by sending radio signals and then looking for a response signal from the key fob. If the system is able to recognize the signal, the car's doors are unlocked and the onboard computer activated. Certain systems have an additional transmitter in the trunk of the car which opens when you move a foot under it. Each key fob is equipped with a unique digital identity code that's assigned by the manufacturer. The fob is programmed by a unique process called “programming”. This involves turning the ignition of the vehicle several times in a specific sequence. It may also require pulling levers or buttons or removing fuse. When a key fob is programmed to your specific vehicle's keyless entry system it transmits its digital identity code along with an operation code that tells the car what to do (lock, unlock, or open the trunk). The car's receiver checks the authenticity of the transmitter by an authentication and encryption process. If it's authorized, the onboard computer unlocks the vehicle and then starts the engine. There are concerns that a criminal with a sly approach could intercept the code transmitted between the key fob and the car. This would require a device to record the transmission then transmit it again when the system isn't expecting it. To combat this, most keyless entry systems rely on rolling code, which ensures that each new transmitter signal received by the car has a different counter than the previous one. Batteries A dead battery is the most frequent reason for the car remote to not function. It's a simple and inexpensive fix if you have another key fob at hand to replace the old one with. The majority of fobs are powered by watches-style batteries, which can be purchased at hardware stores or big-box stores for less than $10. You can find the steps to disassemble your key fob on the internet or in your car's manual. Be careful not to damage any circuits or antennas inside the case once you've removed the battery. If you mess with them the key fob could become unprogrammable and will not function. If you must move the key fobs, be cautious. Some key fobs may have fasteners which can easily open and scatter key fob pieces all over your living space. Most key fobs come with a single hole for a screwdriver or other pry tool to open the case, however it's best to wedge your pry tool around the outside of the case first, like you were peeling an apple or orange. Don't apply too much pressure, as the case of the fob is usually made of plastic and can break or crack if you apply too excessive pressure to it. Make sure you match the size and style of the battery to your key fob when you replace it. Some key fobs come with two batteries while others need one. The wrong battery can cause your remote to become useless. If the problem persists then you can try it again using your fob's key after installing the new battery. If this doesn't work then you'll have to determine if the fob is experiencing an issue that is more complicated and requires professional diagnosis. It could be necessary to have the key fob reset at the dealer or purchase a new one. Buttons The little buttons on your key fob are pretty tiny, and packed with delicate electronics. So it's not too surprising that they're likely to fail from time to time. The good thing is, if your car key button isn't working, there's usually something you can do to fix it yourself. The most common reason that a car remote stop working is due to dirt or crud have trapped between the button. To remedy this, take out the batteries in a careful manner and clean each button using a cotton swab that is dipped in ruby alcohol. Make sure to dry them thoroughly prior to replacing the batteries. It's possible that your key fob has been damaged in some way, such as being dropped on concrete or accidentally scratched. If that's the case, using another key fob to check its functionality may reveal that yours has been damaged and requires to be replaced. Another possibility is that the door lock sensor in your vehicle has stopped working. It's a tiny metal piece that is connected to the key fob's door lock button. It's not unusual for it to break due to weather conditions or prolonged use. To reactivate the sensor, simply try pressing your key button several times without locking or unlocking your doors to reset it. If all other options fail, you can always test the operation of a spare key by trying to open and close your doors using it. If the spare key doesn't work, you may have to contact a 24-hour locksmith who offers automobile key repair to get your remote working again. You can change the settings on your computer if your car key button is working, but it still does not lock or unlock the vehicle. If you have had the same key fob for a while, it may need to be reset every few months to to work with your vehicle. It's not an ideal situation, but it's better than having to replace the remote completely.