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Citroen C3 Key Fob Replacement If your C3 key fob suddenly stopped functioning, it could be due to an inoperative module. If the key fob's function is functional, the issue could be due to something else, such as water damage or a dead coin battery. Citroen intends to cater to the masses by offering eC3. It comes with a variety of features, including virtual remote diagnosis and an app specifically designed for customer service. Dead coin battery If the key fob's unlock button is not functioning, there could be a problem with the coin battery. The battery is expected to last between three and four years with regular use however, it could die abruptly. The automakers have created fail-safes that let you lock and start the vehicle even if the key fob is dead. The battery in the key fob is secured with metal clips that complete an electrical circuit. If these are worn or dirty, the battery will not receive electricity. The battery must be the right size and type. If the battery is too small or too large, it won't fit into the fob and won't perform as expected. Key fob batteries are typically sold under different names, like CR2016 and CR2032 (though they aren't interchangeable). Consult your owner's guide or look for a label on the fob that contains the details. When you've got the proper battery, it can be replaced in just a few moments. Most fobs feature a slider, gap, or switch that you can use to pry open the cover to swap out the original battery for a new one. Be sure that the new battery has the same voltage as the previous one and is correctly inserted. Water damage Water is harmful to electronics, even if they have survived washing cycles or a dip. It can harm the chip and ruin the battery. There are several things you can do to reduce the risk of damage. First, you must take the battery off and dry out the interior and circuit board as much as you can. You can also clean the battery using a cotton swab that has been submerged in 90 percent alcohol. After cleaning the key fob you must let it dry for several days. You can accelerate the process by placing it on a high shelf where it will not be disturbed. After you've confirmed that it's bone dry try putting in a brand new battery and operating it as usual. If the key fob still doesn't work, you may have a malfunctioning receiver module that isn't able to transmit signals to your car. This could be expensive to fix, but it's definitely worth trying if you want to avoid having to buy a new one. The simplest method to fix a malfunctioning key fob, is to replace the battery. The radio signal should be restored and your key fob should work once you replace the battery. If the issue persists, you should seek help from a professional. Faulty receiver module In some instances there are instances where a flaw in the receiver module of the key fob could cause it to stop receiving or transmitting the correct signals. In this situation the car will not recognize the remote control key. It will not unlock or start. In this case, a replacement remote control will be needed. The steps required to reprogram the key fob differs based on model and manufacturer therefore, you should consult the owner's manual before attempting to do it yourself. First, ensure that the key fob's battery is in good shape and that all of its buttons are functioning. Also, close the doors and disconnect any aftermarket devices like radios or alarm systems from the vehicle. You can also try cleaning the chip using isopropyl alcohol or electronic cleaner. If the chip is damaged it is likely to need to be replaced. After cleaning the key fob, remove the circuit board. Clean the contacts with alcohol swabs, and let them dry. Once the contacts are dry, you can put them back together and test the key fob. If it's still not working you might need to replace the battery. Make sure you choose a battery with the same voltage as the old battery. It is recommended to ensure that the battery is installed correctly, as the contact points can be extremely sensitive. Keyless entry system malfunctions It can be a hassle If the key fob ceases working. It's generally easy to get your key fob back up and running. A dead coin battery is the most frequent cause of a malfunctioning fob. This can be easily replaced in a matter of minutes. Other causes include signal interference, an ineffective receiver module and other electrical issues. The first step is to make sure that the battery is properly inserted and has the right voltage. It is also important to use the correct type. Using an incorrectly sized or polarized battery can damage the internal circuitry. Examine the fuses to determine if they are damaged or melt. Another possible problem is that the transponder in the key could have been damaged or gone missing. This is a scenario that requires further testing by a car dealer or professional mechanic. Auto locksmiths and dealers can reprogram the key fob on the vehicle for a fee. However, this can be costly. If G28 Car Keys have an extra key, it may be worthwhile to try reprogramming the fob yourself. In most cases, it is possible to locate the steps in the owner's manual. If you do not have the manual, you can find the instructions online or on YouTube. It is important to consult the owner's manual before attempting any repairs on the key fob.