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Citroen C3 Key Fob ReplacementIf your C3 key fob suddenly stopped functioning it could be due to an inoperative module. If the key fob still functions, it could be because of other issues, such as water damage or a dead battery.Citroen intends to cater to the mass market by offering eC3. It offers several facilities such as remote diagnostics through virtual computers and a dedicated customer support application.Dead coin batteryIf the unlock button on the key fob isn't working, or if the unlock button does not work, it could be that the coin battery is faulty. The battery is expected to last between three and four years with regular usage but it is possible to die in a sudden manner. The car manufacturers have designed fail-safes that let you lock and start your car even if your key fob is dead.The battery inside the key fob is normally secured by metal clips that form the circuit. If they're worn or filthy, the battery might not be able to receive electricity. The battery should be the correct size and type. The battery won't fit in the fob if it's too large or small.Batteries for key fobs are sold under a variety of names like CR2016 or CR2032. These are not interchangeable. Refer to the owner's manual for your model or look for a sticker on the fob which contains the details.Once you've found the correct battery you can replace it in a matter minutes. Most fobs come with a slider, switch, or gap that you can use to pry open the cover to swap out the old battery for the new one. Make sure that the new battery is the same voltage and is inserted in the correct orientation.Water damageEven even if your key-fob has survived the wash cycle or an immersion in the pool, it isn't suitable for electronics. It can damage a battery and cause serious damage to the electronic chip inside. Fortunately, there are a few actions you can take to limit the damage.First, you must remove the battery and dry out the inside and circuit board as much as is possible. You can also clean the battery using a cotton swab, which has been submerged in 90 percent alcohol.After you have cleaned the key fob, you must let it dry for a few days. You can accelerate the process by placing it on a shelf where it will not be disturbed. Once you're certain that the battery is totally dry, you can put in the new battery and use it in the same way as before.If your key fob not working, it could be that the receiver module inside your car is malfunctioning and cannot transmit signals. It's costly to fix, but it's worth it if you don't want to replace your car.The easiest method to fix a malfunctioning key fob is to replace the battery. The radio signal will be restored and your key fob should function again after replacing the battery. If the issue persists you should seek professional help.Faulty receiver moduleIn some cases an issue with the receiver module of the key fob might prevent it from receiving or transmitting proper signals. If this is the case, your car won't recognize your remote control key and will not unlock or start the engine. In this situation, a replacement remote control is required.The steps needed to reprogram a key fob vary by make and model and model, so make sure you read the owner's manual before trying to do it yourself. The first step is to ensure that the battery in the key fob is in good condition and that all of its buttons are working. Close the doors and remove any aftermarket devices such as alarms or radios from your vehicle.You could also try cleaning the chip using isopropyl alcohol 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, clean the contacts using alcohol swabs and let them dry. Once the contacts are dry you can reassemble them and test the key fob. If it's still not working you might need to replace the battery. Choose a new battery that has the same voltage as the battery you replaced. It's also a good idea to double-check that the battery is placed in the correct position because the contact points are very sensitive.A malfunctioning keyless entry systemThe key fob is an excellent convenience in vehicles but it can also be a hassle when it stops working. The positive side is that most times it's easy to get it working again. A dead battery for the coin is the most frequent reason for a fob that is malfunctioning. This can be easily repaired in just a few minutes. Other causes include signal interferance, a bad module and other electrical problems.The first step is to ensure that the battery is of the correct voltage and that it is correctly installed. The correct battery type is also crucial. The internal circuitry inside the device can be damaged when you use a battery that is not the proper size or the correct polarized. Examine the fuses for damage or if they have burned.Another possibility is that the transponder contained in the key could have been damaged or gone missing. citroen c1 key is a scenario that will require further diagnosis by a dealer in the car or a professional mechanic.Auto locksmiths and dealers will reprogram the key fob of a vehicle for a fee. However, this can be costly. If you have an extra, it could be worth trying to reprogram the fob yourself. In the majority of cases, you will locate the steps in your owner's guide. If you do not have the manual, you can look up instructions online or on YouTube. It is imperative to check the owner's manual before attempting any repairs on the key fob.