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Citroen C3 Key Fob Replacement If your C3 key fob suddenly stopped functioning, it could be because of a faulty module. If the key fob still is working it could be because of another issue, such as water damage or a dead battery. Citroen is aiming to reach the masses by offering eC3. It comes with a variety of options, including remote diagnostics via virtual technology and a specialized customer service application. Dead coin battery If the unlock button on the key fob does not work, it may be that the battery inside the coin is defective. Battery life should be between three and four years with regular usage. However, it can suddenly stop working. The car manufacturers have developed fail-safes which allow you to lock and start your car even if your key fob is dead. The battery in the key fob is secured by metal clips that form a circuit. The battery may not be powered if these clips are worn or dirty. The battery should be of the correct size and type. If the battery is too small or large it will not fit in the fob and won't function properly. Key fob batteries are usually sold under various names, like CR2016 and CR2032 (though they aren't interchangeable). Check out the owner's manual or look for a sticker on the fob with the information. Once you've found the correct battery that you want to replace, it can be done within a matter of minutes. Most fobs feature a slider, switch, or gap that can be used to pry open the cover to swap out the old battery to get a new one. Make sure that the new battery is of the same voltage and that it is placed in the correct orientation. Water damage Water is bad for electronics even if they've survived the wash cycle or a dip. It can damage batteries and cause significant damage to the electronic chip inside. There are a few things you can do to limit the risk of damage. It's crucial to first eliminate the battery, and then dry the inside as possible. You can also clean the battery by using a cotton swab that has been dipped in 90 percent alcohol. After you've cleaned the key fob, you should wait a few days for it to completely dry out. It is possible to speed this process by placing it on a shelf, so it isn't disturbed. When you're sure the battery is dry, insert the new battery and use it in the same way as before. If your key fob still not working, it could be that the receiver module in your car is damaged and cannot transmit signals. It's expensive to repair, but it's well worth trying to avoid the expense of a replacement. The simplest way to fix a faulty key fob is to replace the battery. The radio signal should be restored and your key fob should work again after changing the battery. If the problem continues, you should seek professional assistance. The receiver module is not working properly. In some instances an issue with the receiver module of the key fob can cause it to stop receiving or transmitting the right signals. If this is the situation, your car will not recognize your remote control key and will not be able to unlock or start the engine. In this case the replacement remote control is required. The steps to reprogram the key fob are different for each make and model So, make sure to consult the owner's manual before trying to do it yourself. First, check that the battery of the key fob is in good working order and that all of its buttons are working. Also, shut the doors and disconnect any additional devices such as radios or alarm systems from the vehicle. You might also try cleaning your chip with isopropyl Alcohol or electronic cleaner. If the chip has become damaged, it will probably need to be replaced. After cleaning the key fobs, remove the circuit board. Then, clean the contacts using alcohol swabs and allow them to dry. Once the contacts are dry you can put them back together key fob and test it. If the key fob still doesn't work, then it could be necessary to replace the battery. Make sure you choose the new battery with the same voltage as your old one. It is recommended to double-check that the battery is in place and that the contact points are very sensitive. Keyless entry systems that aren't working properly It can be a hassle If the key fob ceases working. The positive side is that most of the time it's easy to get it back up and running. A dead coin battery is the most common reason for a malfunctioning fob. It can be repaired in just a few minutes. Other causes are signal interference, a bad module and other electrical problems. The first step is to make sure that the battery is running at the correct voltage and that it is correctly placed. The correct type of battery is also vital. Using a wrongly sized, or polarized battery could damage the internal circuitry. Examine replacement citroen c1 key to determine if they are damaged or if they have been melted. Another possible problem is that the transponder inside the key could have been damaged or even lost. This is a situation that will require further diagnostics by a dealer in the car or a professional mechanic. Many dealerships and auto locksmiths can reprogram the fob of your car's keys for a fee, but this can be expensive. It might be worth it to reprogram your spare fob if you own one. In most cases, you can get instructions from your owner's guide. If you don't own the manual, you can locate instructions online or on YouTube. It is important to consult the owner's manual prior to making any repairs to the key fob.