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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 big enough to accommodate five people and is a great vehicle to get around the city. Sometimes, a keyfob can cease to function because of pairing issues. If you follow the directions correctly, the issue can be resolved easily. However, a professional equipped with the right equipment is required to fix certain types of vehicles. Dead coin battery A dead battery is the most common issue with remote key fobs. It is an easy fix however. All you have to do is replace the coin battery. The batteries are available at your local auto shop and look like small silver coins. After you've replaced the battery, you'll be able to lock and unlock your vehicle. Interference is another reason why your key fob may not work. It can be caused by various factors, such as objects, weather conditions or other transmitters that operate on the same frequency. If this happens, it may be necessary to take the key from the ignition and try again. The deprogramming of your key fob may be a reason for its failure to work. This can happen if the key is exposed to water or it isn't removed correctly after replacing the battery. You can usually fix the programming by following the guidelines in the owner's manual. If you are unable to do it get it done, you can go to a locksmith shop or a professional to complete the task for you. Water damage The Citroen C4 is a highly reliable car, however it's a vehicle with hundreds of interconnected components. Like every car it could experience occasional breakdowns from time occasion. In some cases the issue is easily resolved. However, in other instances, you might need to visit a mechanic or contact a professional for assistance. The most frequent reasons for the C4 key fob not functioning are the battery being dead, water damages, signal interference and receiver module malfunctions. Water damage can be caused by sweat or moisture on the circuit board. This could cause the circuit to become shorted, which can lead to the battery draining or dead key fob. Keep your key fob away from the water and in a plastic bag. A multimeter can be used to measure the battery's voltage. A successful test will reveal values between 12 and 13. If your battery doesn't produce these values, it could be defective. This means you'll need to replace the battery. A malfunctioning receiver module A damaged receiver module may cause the key fob to cease working. Citroen owners are often faced with this issue because the keyfob has to send an indication to the door handle in order to unlock and start the vehicle. If the key fob is unable to send this signal, it won't function and will need to be replaced. This can be done at a dealer for cars or by an experienced mechanic. There are several different issues that could happen with your Citroen C4 key fob. This includes a dead coin battery signal interference, water damage or a defective electronic chip. To begin troubleshooting, check the batteries on the key fob and look for any obvious signs. This can be done by taking the keyfob apart and removing its battery to have a better look. If you spot a depleted battery replace it with a fresh one. Make sure that the new battery has the same voltage, size, and specification. Also, ensure that the fob is properly snapped together before replacing it. A faulty 12 volt battery A majority of modern cars come with key fobs that let you to lock and unlock your vehicle from a distance. These devices send an electronic signal to the vehicle to control the locks. They are powered by batteries. Batteries can degrade over time. The good news is the replacement battery isn't expensive and simple to install. You can take the fob apart by using a flat-bladed screwdriver. you can find the instructions in your owner's guide. Replace the battery with one of the same size and type as the original. Different batteries can have different voltages which can cause your fob to stop functioning or display a low-battery alert. Remember to also orient the battery in such that the plus and negative indicators are in line with the initial orientation. This will ensure that the chip receives the correct signals. Alternatively, the problem may be caused by a faulty receiver module. In this scenario, it is recommended that you contact the dealer for further assistance and repairs. Keys that are not paired need reconfiguration Car key remotes may fail to function for many reasons. Most of these issues are quick and easy to fix. Most of the time an inoperable coin-cell battery is the cause. This can be easily replaced in a matter of minutes at most auto part shops. It is important that the new battery is installed correctly. Metal retaining clips should be tightened properly and the contacts of the battery should be cleaned. Another possibility is a faulty receiver module or signal interference. If TheKeyLab fob doesn't receive a clear signal from the receiver, it might not be able to lock or unlock the doors and start the vehicle, or operate the hands free system. In such cases it is recommended to reset the receiver by disconnecting the battery for a couple of minutes. Smart keys are more expensive and could cost as much as $500 to replace. They come with a security chip that disables the immobiliser on your vehicle. It is recommended to have two keys working for your C4 in order to avoid the cost of these keys. This replacement remote key fob is rebuilt and tested with brand new internal components before being sent to you.