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Citroen C3 Key Fob Replacement If your C3 key fob suddenly stopped functioning it could be because of malfunctioning components. If the key fob remains operational, the issue could be due to something else, such as water damage or a dead coin battery. Citroen hopes to meet the needs of the masses with its eC3. It comes with a variety of options, including remote diagnostics via virtual technology as well as a specialized customer service application. Dead coin battery If the key fob's unlock function isn't working, there is a problem with the battery of the coin. The battery's lifespan should be between three and four years with regular use. However, it is possible that it will suddenly die. The car manufacturers have designed fail-safes that allow you to lock and start the vehicle even if your key fob is dead. The battery inside a key fob is usually secured by metal retaining clips that complete the circuit. The battery may not be able to run if these clips are dirty or worn. The battery must be of the correct size and type. The battery won't fit into the fob if it is too large or small. Key fob batteries are sold under various names, including CR2016 and even CR2032. They cannot be interchanged. Consult your owner's guide or look for a label on the fob that contains the information. Once you've got the right battery, it can be replaced in a matter of seconds. Most fobs come with a slider, switch, or gap that can be used to pry open the cover and exchange the old battery for the new one. Make sure the new battery has the same voltage as the old one and is correctly inserted. Water damage Even even if your key-fob has survived the wash cycle or a dip in the pool, it isn't good for electronics. It can cause damage to the chip, and even destroy the battery. There are a few steps you can do to limit the risk of damage. First, it's crucial to get rid of the battery and dry out the inside and circuit board as much as possible. You can also clean the battery using a cotton-swab that has been submerged in 90 percent alcohol. After you've cleaned your key fob, wait several days for it to completely dry out. You can speed up the process by placing it on a shelf that won't be disturbed. Once you are sure that the battery is completely dry, replace it with an additional battery and continue using it as normal. If the key fob still does not work, you might have a malfunctioning receiver module that's not transmitting signals to your vehicle. It can be costly to fix, but it's worth trying if you want to avoid a costly replacement. The most straightforward way to fix a malfunctioning key fob is to replace the battery. The radio signal will be restored and your key fob should be operational again after changing the battery. If the issue continues, you should seek professional assistance. Faulty receiver module In some instances the key fob's transmitter module could be defective that is preventing it from receiving or transmitting the proper signal. If this is the situation, your car will not recognize your remote control and will refuse to unlock or start the engine. In this scenario, you'll need to get another replacement. The steps for reprogramming a key fob vary by model and manufacturer, so consult your owner's manual before attempting to do it yourself. citroen berlingo key is to ensure that the key fob's battery is in good shape and that all buttons are functioning. Close the doors and take out any aftermarket devices such as alarms or radios out of the vehicle. You can also clean the chip using isopropyl or electronic cleaner. If the chip has become damaged it is likely to be replaced. After you've cleaned the key fob, remove the circuit board. Clean the contacts using alcohol swabs. Let them dry. After the contacts are dry, you can put them back together and test the key fob. If the key fob still doesn't work, then it may be required to replace the battery. Make sure you choose a battery with the same voltage that the original battery. It is also a good idea to ensure that the battery is in correctly and that the contact points can be extremely sensitive. Keyless entry system malfunctions It can be frustrating if the key fob stops functioning. The good news is that most times, it's easy to get it back up and running. The most frequent cause of a malfunctioning key fob is a dead coin battery that can be replaced within minutes. Other causes are signal interference, a bad module and other electrical problems. The first step is to make sure that the battery is properly inserted and has the right voltage. The correct type of battery is also important. If you use a wrongly sized or polarized batteries could harm the internal circuitry. Check the fuses for damage or if they have melt. A transponder inside the key could be damaged or not functioning properly. This problem will require further investigation by a qualified mechanic or dealer in cars. Auto locksmiths and dealerships can reprogram the car's key fob at a cost, but this can be expensive. If you have a spare, it might be worthwhile to try reprogramming the fob yourself. You can usually find instructions in the owner's manual. If you don't own the manual, you can find instructions online or on YouTube. Before you attempt to repair the key fob, it's important that you consult the owner's guide.