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Citroen C4 Key Fob Replacement The Citroen C4 Picasso, a compact SUV for small families that is truly innovative, comes with some great features. It's big enough to accommodate five people, and is a great option to get around town. Sometimes, G28 working due to pairing issues. If you follow the steps properly, this issue can be easily fixed. For certain vehicles, a professional may be required to use specialized tools. Dead coin battery The most frequent issue with remote key fobs is a dead battery. It is a simple fix however. All you have to do is replace the battery in the coin. These batteries look like little silver coins, and can be found at your local auto shop. After replacing the battery, your vehicle will be able to open and lock. Another reason why your key fob won't work is because of interference. It could be caused by various factors, including weather conditions, objects, or other transmitters operating on the same frequency. If this happens it is possible to take out the ignition key and try again. The key fob's deprogramming could also be the cause of the key's inability to function. This could happen if the key is exposed to water, or if it's not properly removed after replacing the battery. It is usually possible to restore the programming by following the directions in the owner's manual. If you are unable accomplish this, you may ask a professional locksmith or dealer to help you. Water damage The Citroen C4 is a highly reliable car, however it's an automobile with a lot of interconnected components. Like any other car it is likely to have occasional breakdowns from time moment. In some cases the problem can be fixed easily. In some instances you may have to call for help or visit a mechanic. The most common reasons that the C4's main fob stops working are a dead coin battery, water damage, signal interference and issues with the receiver module. Moisture or sweat on the circuit board of the key fob could cause water damage to the circuit board of the key fob. This could cause a short circuit in the circuit and result in a dead keyfob or battery drain. Keep your key fob out of the water and in an airtight bag. A multimeter can be used to test the voltage in your battery. A successful test will produce numbers between 12 and 13 If your battery isn't producing these numbers, then it may be defective. This means you will need to replace the battery. A malfunctioning receiver module A faulty receiver module can cause the key fob to cease working. This is a frequent issue for Citroen owners, since the key fob is required to send a signal to the door handle to unlock and start the vehicle. If the key fob is unable to send this signal, it will not work and needs to be replaced. This can be performed at a car dealership or by an expert mechanic. There are a variety of things that can go wrong with your Citroen C4 key fob. It could be due to a dead coin battery signal interference, water damage or a malfunctioning electronic chip. The first step in troubleshooting is to test the batteries on the key fob and look for obvious signs of damage. This can be done by opening the keyfob and then removing its battery to take a closer view. Replace the battery if it has exhausted. Make sure that the new battery is of the same voltage, size and specification. Make sure you connect the fob prior to replacing it. A faulty 12 volt battery A majority of modern cars have key fobs that let you to lock or unlock your vehicle remotely. These devices send signals to the car to control the locks and use battery power to operate. However, batteries can fail over time. The good news is that a replacement battery is affordable and simple to replace. You can use a flat-blade screwdriver to break the fob, 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's function to cease or display a low battery warning. Be sure to position the battery in such that the positive and negative symbols match the initial orientation. This will ensure that the chip is receiving the correct signals. The issue could be caused by a faulty receiver module. In this situation, it is recommended to contact the dealer to discuss further diagnosis and repairs. Unpaired key that requires reconfiguring The car key remote could stop working due a number of reasons. Fortunately, most of these issues can be resolved quickly and easily. Most often an inoperable coin-cell battery is the reason. This can be easily replaced in just a few seconds at most auto parts shops. However, it's important to make sure that the new battery is properly installed. Metal retaining clips must be tightened properly and the battery's contact points should be clean. A defective receiver module or signal interference is a second possibility. If the key fob is not receiving a strong enough signal from the receiver, it could not be able to lock or unlock doors and start the car or operate the hands-free feature. In these instances you can reset the receiver by removing the battery for a few minutes. Smart keys are more expensive and could cost up to $500 to replace. They contain an electronic security device that disables the immobiliser in your vehicle. It's best to have two keys that work for your C4 in order to save money on these costly costs. The key fob replacement is repaired and tested using new internal components before being shipped to you.