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Citroen C4 Key Fob Replacement The Citroen C4 Picasso is a small family car/compact SUV with some truly innovative features. It's spacious enough to accommodate five people and it's a great way to get around town. Sometimes the key fob stops working due to pairing issues. This issue can be resolved if instructions are followed. However, a professional equipped with special equipment is required for specific models of vehicles. Dead coin battery The most common problem with remote key fobs is an inactive battery. It's an easy fix however. It is all you need to do is replace the battery with a coin size. These batteries are available at your local auto retailer and look similar to small silver coins. After replacing the battery, you will be able to lock and unlock your vehicle. Interference is another reason your key fob won't work. This can be caused by various factors, including objects, weather conditions, or other transmitters operating on the same frequency. If this occurs, it may be necessary to take off the ignition key and try again. The fact that your key fob is not programmed could also be the cause of its inability to function. This can happen when the key is exposed to water or if it isn't removed correctly after replacing the battery. You can usually fix the programming by following the directions in the owner's manual. If you are unable to do this, you can seek out a professional locksmith or dealer to help you. Water damage Citroen C4 has a high level of reliability, yet it's still a complicated machine with hundreds of interconnected components. It's not uncommon for a Citroen C4 to have a breakdown. In some instances, the issue can be easily fixed. In other cases, you might need to see a mechanic or call for assistance. The most common reasons that the C4's main fob stops working include a dead coin battery or water damage, signal interference and issues with the receiver module. Water damage can be caused by sweat or moisture on the circuit board. This could cause the circuit to short, resulting in the battery draining or a dead key fob. Keep your key fob out of the water and put it in an airtight bag. You can also test the battery's voltage using a multimeter. A successful test will reveal numbers between 12 and 13. If your battery isn't generating these values, it may be defective. This means that you'll need to replace the battery. The receiver module is not working properly. A defective receiver module could cause the key fob to cease working. This is a typical issue for Citroen owners, as the key fob is required to transmit a signal through the door handle to unlock and begin the vehicle. If the key fob fails to transmit this signal, it won't work and must be replaced. This is typically done by a mechanic or a dealership. Citroen C4 keys can malfunction due to a variety of reasons. This can be an empty coin-cell battery, water damage or signal interference. To begin troubleshooting, test the batteries of the key fob, and look for any obvious signs. This can be done by opening the keyfob and removing its battery for a more thorough view. Replace the battery if it has exhausted. Be sure the new battery has the same voltage, size, and specification. Make sure that you fully connect the fob before replacing it. Faulty 12 Volt Battery The majority of newer cars have key fobs that let you to lock and unlock the vehicle from some distance. These devices send a signal the car to control the locks. They use battery power to operate. Batteries can fail with time. The good part is that the replacement battery isn't expensive and easy to replace. You can use a screwdriver with a flat blade to pry open the battery or your owner's manual might have instructions on how to do it. Replace G28 Car Keys with one of the same size and type as the original. Different batteries may differ in voltage, which can cause your device to stop working or display a low-battery warning. Be sure to align the battery in a way that the plus and minus indicators match the orientation of the original. This will ensure that the chip is receiving the proper signals. The problem could also be caused by a faulty module. If this is the case, you should contact your dealer for further assistance and repairs. Keys that are not paired require reprogramming The remote for your car's key may stop working due to several reasons. Most of these issues are quick and easy to fix. The most frequent cause is an old coin battery, which can be replaced in a couple of minutes at most auto parts stores. It is important that the new battery be installed correctly. Metal retaining clips need to be properly tightened, and the contacts of the battery must be cleaned. Another possibility is that of a damaged receiver module or signal interference. If the key fob is unable to receive a clear signal from the receiver it could not unlock or lock the doors either, start the vehicle or operate the hands-free system. In these situations you can reset the receiver by removing the battery for a few minutes. Smart keys, which include an integrated security chip that disables the vehicle's immobiliser system, are more expensive than traditional keys made of metal and can cost up to $500 to replace. To avoid these costs it's best to have at minimum two keys working for your C4. The replacement remote key fob has been refurbished and tested with new internal components before being shipped to you.