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Citroen C4 Key Fob Replacement The Citroen C4 Picasso is a small SUV for families that has several truly innovative features. It's spacious enough for five people and is an ideal vehicle to travel around the city. Sometimes the key fob stops functioning due to pairing issues. If you follow the steps properly, this issue can be resolved easily. However, a professional with specialized equipment is needed to fix certain types of vehicles. Dead coin battery The most frequent issue with remote key fobs is a dead battery. It is a simple fix however. You only need to replace the battery in the shape of a coin. citroen keyless entry resemble tiny silver coins, and are available in your local automotive shop. After you have replaced the battery, your vehicle should be able to unlock and lock. Interference is another reason that your key fob might not function. This could be due to several factors, including objects, weather conditions, or other transmitters operating at the same frequency. If this happens, it may be necessary to remove the ignition key and try again. Another reason why your key fob won't work could be because the fob has been deprogrammed. This can happen if the key has been exposed to water, or if the battery isn't removed properly after replacing the key. Usually, you can re-set the programming of your car by following the guidelines provided in the owner's manual. If you are unable to do it resolve the issue, you can contact a dealer or professional locksmith to assist you. Water damage Citroen C4 has a high degree of reliability, but it's still a complicated machine with hundreds of interconnected components. Like any other car it can encounter an issue from time to time. In some cases it is easy to get the issue fixed. In some instances you may have to contact a professional for assistance or see an expert. The most common causes of the C4 key fob not functioning are a dead coin battery water damage, signal interference and receiver module problems. Water damage can be caused by sweat or moisture on the key fob's circuit board. This can short the circuit and result in a dead keyfob or battery drain. Keep your key fob away from the water and in an airtight bag. You can also test the voltage of your battery by using a multimeter. A successful test will yield numbers between 12 and 13 If your battery isn't generating these numbers, it could be defective. This means you'll need to replace the battery. Faulty receiver module A defective receiver can cause the key fob to cease working. This is a common problem for Citroen owners, as the key fob must transmit a signal through the door handle to unlock and start the vehicle. If the key fob is unable to transmit this signal, it won't function and should be replaced. This is typically done by a mechanic or a dealer. There are many different possibilities for problems with your Citroen C4 key fob. This could be due to an empty coin-cell battery, water damage or signal interference. To begin troubleshooting, check the key fob batteries and look for obvious indications. This can be done by opening the key fob and then removing the battery to get a better view. Replace the battery if it is drained. Make sure the new one has the same voltage, size, and specifications. Also, make sure that the fob is fully joined before replacing it. Faulty 12 Volt Battery A lot of newer vehicles have key fobs which allow you to lock or unlock the vehicle remotely. These devices send an electrical signal to the vehicle to control the locks. They are powered by batteries. Batteries can degrade over time. The good news is that the replacement battery is inexpensive and simple to install. You can use a screwdriver with a flat blade to pry open the battery or your owner's manual may contain instructions on how to do it. When replacing the battery, be sure that you're using a battery of the same size and type as the original. Different kinds of batteries have different voltages, which can cause the fob to stop working or display a low battery warning. Also, remember to orient the battery in a way that the plus and minus symbols correspond to the orientation of the original. This will ensure that the chip is receiving the proper signals. It is also possible that the issue could result from a malfunctioning receiver module. In this case you should consult your dealer for additional diagnostics and repairs. Unpaired keys require reprogramming Car key remotes might stop working for various reasons. Most of these issues are easily and quickly fixed. Most of the time the problem is caused by a defective battery in the coin-cell. is the cause. It can be replaced in a couple of moments at most auto parts shops. However, it's important to make sure that the new battery is properly installed. Metal retaining clips must be properly tightened and the battery's contacts should be clean. Another possibility is a faulty receiver module or signal interference. If the key fob does not receive a strong signal from the receiver it could not unlock or lock the doors either, start the vehicle or operate the hands-free system. In these cases it is recommended to reset the receiver by disconnecting the battery for a couple of minutes. Smart keys, that have an integrated security chip that disables the car's standard immobiliser system they are more expensive than traditional keys made of metal and can cost up to $500 to replace. To avoid these costs, it's a good idea to have at minimum two working keys for your C4. The key fob replacement is refurbished and tested with new internal components before being shipped to you.