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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 functioning, the issue could be caused by something else, such as water damage or a dead coin battery. Citroen aims to serve the mass market with its eC3. citroen c4 grand picasso key fob programming offers several features including virtual remote diagnosis as well as an app specifically designed for customer service. Dead coin battery If the unlock button on the key fob does not work, it may be that the battery for the coin is faulty. The battery's lifespan should be between three and four year with regular usage. However, it could abruptly die. The automakers have created fail-safes that permit you to lock and start your car even if your key fob is dead. The battery in the key fob is secured with clips made of metal, which complete the circuit. The battery may not be powered if these clips are dirty or worn. The battery also needs to be the correct size and type. If the battery is too small or too large, it will not fit into the fob and won't function properly. Batteries for key fobs are sold under a variety of names, including CR2016 and even CR2032. These batteries are not interchangeable. Check out the owner's manual or look for a label on the fob with the details. Once you've found the correct battery and it's replaced, it's possible to replace it in just a few moments. Most fobs have a slider, gap, or switch that can be used to pry open the cover to swap out the old battery for an alternative. Be sure that the new battery is of the same voltage as your old one and is inserted correctly. Water damage Water is bad for electronics even if they've been through a wash cycle or a dip. It can damage batteries and cause significant damage to the electronic chip inside. There are some things that you can do to minimize the damage. It is crucial to get rid of the battery and dry the interior and circuit board as much as you can. You can also clean the battery using a cotton swab that has been dipped into 90-percent alcohol. After you've cleaned the key fob, wait several days for it to completely dry. You can speed up the process by placing it on a high shelf where it won't be disturbed. Once you're sure that it's dry, put in a new battery and running it in the same way as you normally would. If your key fob not working it could be because the receiver module in your car is faulty and cannot transmit signals. It's expensive to repair, but it's well worth trying if you want to avoid having to buy a new one. The easiest way to fix a broken key fob is to change the battery. The radio signal should be restored and your key fob will be operational again after changing the battery. However, if the problem persists then you should seek out professional help. Receiver module that is defective In certain cases there are instances where a flaw in the receiver module of the key fob might cause it to stop receiving or transmitting the correct signals. If this is the case, your car won't recognize your remote control and will refuse to unlock or start the engine. In this case an alternative remote control is required. Check out the owner's guide prior to trying to program the key fob yourself. First, make sure that the battery on the key fob is in good shape and that all buttons are functioning. It is also recommended to shut the doors and disconnect any accessories like radios or alarm systems from the vehicle. You can also clean the chip using isopropyl or electronic cleaner. If the chip is in a state of disintegration it is likely to be replaced. Once you've cleaned the key fob, you can remove its circuit board. Clean the contacts using alcohol swabs and allow them to dry. After the contacts have dried then you can reassemble the key fob and test it. If it still doesn't work you might need to replace the battery. Make sure to use an alternative battery that is able to provide the same voltage as the older one. It's also a good idea to make sure the battery is in place because the contact points are very sensitive. Faulty keyless entry systems The key fob is a wonderful convenience for cars, but it can be frustrating when it stops working. The good news is that the majority of the time it's simple to get it back up and running. The most common cause for a malfunctioning key fob is a dead coin battery that can be replaced in minutes. Other reasons include signal interference, malfunctioning receiver modules or other electrical issues. The first step is to ensure that the battery has the correct voltage and is correctly installed. The correct battery type is also important. Using an incorrectly sized or polarized one could cause damage to the internal circuitry. You should also examine the fuses to make sure they aren't blown out or have not melted. Another possible problem is that the transponder contained in the key could have been damaged or destroyed. This issue will require further diagnostics by a dealer in the car or professional mechanic. A lot of auto locksmiths and dealerships can reprogram a car's key fob for a fee, however this can be costly. It might be worth it to reprogram your spare fob in case you have one. In most cases, you can find instructions in the owner's manual. If you don't have the manual you can look up instructions online or on YouTube. Before attempting to repair the key fob, it's important that you consult the owner's manual.