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Citroen C3 Key Fob Replacement If the key fob on your C3 stopped completely, it could be due to a malfunctioning receiver module. If the key fob is working it could be because of something else, like water damage or a dead battery. Citroen aims to serve the mass market by offering eC3. It has a range of features including virtual remote diagnosis and an app specifically for customer service. Dead coin battery If the key fob's unlock button doesn't working, it could be a problem with the coin battery. The battery is expected to last between three and four years with regular usage but it can fail abruptly. Luckily, car makers have built-in fail-safes to ensure that you can still start and lock your car even if the key fob has a dead battery. The battery inside the key fob is typically held in place by metallic clips that form the circuit. The battery might not be powered if the clips are dirty or worn. The battery also needs to be the right size and type. The battery won't fit into the fob if it is too big or too small. Key fob batteries are typically sold under different names, such as CR2016 and CR2032 (though they aren't interchangeable). The best way to know what type you should buy is to check your owner's manual, or look at the fob to find an inscription which provides you with the precise details. When you have the proper battery, you can swap it in a few minutes. Most fobs have a slider gap, or switch that you can use to break open the cover and swap out the old one for a new one. Make sure the new one is the same size and voltage, and that it is placed in the correct position. Water damage Water can be harmful to electronics even if they've survived washing cycles or a dip. It can destroy the battery and cause severe damage to the electronic chip inside. There are a few things you can do to prevent the risk of damage. It's crucial to first eliminate the battery and then dry the inside as possible. You can also make use of a cotton swab that has been dipped in 90-percent isopropyl alcohol to clean the battery and the circuit board. After you have cleaned the key fob, you should let it dry for several days. It is possible to speed this process by placing it on a shelf so it isn't disturbed. After you've confirmed that it's dry, try putting in a brand new battery and running it as normal. If the key fob still does not work, you might have a faulty receiver module that cannot transmit signals to your car. It can be costly to fix, but it's worth trying to avoid the expense of a replacement. The most straightforward way to fix a damaged key fob is to replace the battery. Changing the battery should bring back the radio signal and make your key fob work once more. However, if the problem persists, you should seek assistance from a professional. Faulty receiver module In some instances the key fob's receiver module could have a problem that is preventing it from receiving or transmitting the correct signal. In this scenario the car won't recognize the remote control key. It will not unlock or start. In this case, you'll need to get a replacement. The steps needed to reprogram keys differ based on model and make and model, so make sure you read the owner's manual before attempting to do it yourself. First, ensure that the battery in the key fob is in good health and that all buttons are functioning. Close the doors and take out any aftermarket devices such as radios or alarms from the vehicle. You can also clean the chip using isopropyl or electronic cleaner. If the chip is in a state of disintegration it will likely need to be replaced. After cleaning the key fobs, remove the circuit board. Then use alcohol swabs to clean the contacts and let them dry in the air. After the contacts have dried you can reassemble them and test the key fob. If the key fob still isn't working, it could be required to replace the battery. Be sure to choose a new battery that provides the same voltage as your old one. Double-check the battery's placement, since the contact points are very sensitive. Faulty keyless entry systems The key fob can be a fantastic convenience in vehicles but it can also be a hassle when it stops working. The good news is that most of the time it's easy to get it back in operation. The most common cause for a malfunctioning key fob is a dead coin battery which can be replaced in a matter of minutes. Other causes include signal interference, a bad module and other electrical issues. The first step is to ensure that the battery is of the correct voltage and has been correctly installed. The correct battery type is also important. If you use a battery that is not properly sized or polarized battery can damage the internal circuitry. Check the fuses for damage or melt. A transponder in the key could be damaged or absent. citroen picasso key fob replacement is a problem that will require further diagnosis by a dealer in the car or professional mechanic. Auto locksmiths and dealers will reprogram the key fob on the vehicle for a fee. However this can be costly. It could be worthwhile to reprogram your spare fob in case you have one. In most cases, you can find instructions in your owner's guide. If you don't have the manual you can find instructions online or on YouTube. It is essential to read the owner's manual prior attempting any repairs to the key fob.