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Citroen C3 Key Fob Replacement If your C3 key fob suddenly stopped functioning, it could be because of an issue with the module. If the key fob is still functional, the issue may be caused by something else, like water damage or a dead coin battery. Citroen intends to cater to the mass market with its eC3. It comes with a variety of features, including virtual remote diagnosis as well as a dedicated app for customer service. Dead coin battery If the key fob's unlock button is not working, there is a problem with the coin battery. The battery's lifespan should be between three and four years with regular use. However, it is possible that it will suddenly stop working. Fortunately, car manufacturers have built-in fail-safes to ensure that you can lock and start your vehicle even if the key fob is dead battery. The battery inside the key fob is secured by clips made of metal that form an electrical circuit. The battery might not be able to run if these clips are worn or dirty. The battery must be of the correct size and type. The battery will not fit into the fob if it is too large or small. Key fob batteries are usually sold under different names, including CR2016 and CR2032 (though these are not interchangeable). Check out the owner's manual or look for a sticker on the fob with the information. When you have the proper battery, you can swap it in just a few minutes. Most fobs include an e-slider, a switch or a gap which can be used to pry the cover off and replace the battery that was used. Make sure the new battery has the same voltage as the older one and that it is inserted correctly. Water damage Even even if your key fob has survived the wash cycle or an immersion in the pool, water is not ideal for electronics. It can destroy batteries and cause significant damage to the electronic chip inside. Fortunately, there are a few options to limit the damage. First, you must remove the battery and dry out the inside and circuit board as much as you can. You can also make use of a cotton swab that has been dipped in 90-percent isopropyl alcohol to clean the battery and circuit board. After you've cleaned your key fob, wait a few days for it to completely dry. You can speed the process up by placing it on a shelf so that it doesn't get smashed. Once you're sure that it's bone dry try putting in a new battery and use it in the same way as you normally would. If the key fob still isn't working, you could have a defective receiver module that's not able to send signals to your car. It can be costly to fix, but it's definitely worth trying to avoid the expense of a replacement. The easiest method to fix a faulty key fob is to replace the battery. The battery change will bring back the radio signal and make the key fob work once more. However, if the problem persists then you should seek out professional help. Receiver module that is defective In certain situations the key fob's receiver module may be affected by a fault that hinders it from receiving and transmitting the correct signal. If this is the situation, your car will not recognize your remote control and will not be able to unlock or start the engine. In this situation an alternative remote control will be needed. Refer to the owner's manual prior to trying to reprogram the key fob on your own. Check that the battery on the key fob is in good working order and that the buttons are working. Also, close the doors and disconnect any aftermarket devices like alarm systems or radios from the vehicle. You can also clean the chip by using isopropyl or electronic cleaner. If the chip has been damaged, you'll have to replace it. After cleaning the key fobs, remove the circuit board. Clean the contacts with alcohol swabs and let them dry. When the contacts are dry, you can reassemble the key fob and test it. If it's not working it may be necessary to replace the battery. Make sure you use the new battery with the same voltage as the old one. It is also a good idea to double-check that the battery is placed in the correct position because the contact points are extremely sensitive. A malfunctioning keyless entry system The key fob can be a fantastic convenience in vehicles However, it can be frustrating when it stops working. It's usually easy to get your key fob back functioning. The most common cause for a malfunctioning key fob is a dead coin battery which can be replaced within minutes. Other causes are signal interference or a defective module, as well as other electrical issues. The first thing to do is to make sure that the battery is of the right voltage and is correctly inserted. The correct type of battery is also crucial. The internal circuitry of the device may be damaged in the event of using the wrong battery, or one that isn't the proper size or polarized. Examine the fuses to determine if they are damaged or melt. Another possible problem is that the transponder contained in the key might have been damaged or destroyed. This issue requires further examination by a car dealer or a professional mechanic. Auto locksmiths and dealers can reprogram the fob of the key in vehicles for a small fee. However this can be costly. If you have an extra, it could be worth trying to reprogram the fob yourself. In most cases, it is possible to find instructions in the owner's manual. If you don't own the manual, you can find instructions on the internet or on YouTube. citroen car key replacement is imperative to check the owner's manual prior to making any repairs to the key fob.