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Citroen C4 Key Fob Replacement The Citroen C4 Picasso, a small family vehicle/compact SUV is packed with truly innovative features. It's big enough to accommodate five people, and is a great option to travel around town. Sometimes the key fob stops working due to pairing issues. This problem may be resolved if instructions are followed properly. However, a professional with specific equipment is required for certain makes of vehicles. Dead coin battery The most frequent issue with remote key fobs is a dead battery. However, there is a simple solution. All you have to do is replace the battery in the coin. These batteries resemble tiny silver coins and can be found at your local auto shop. After replacing the battery, your car should be able unlock and lock. Another reason your key fob won't work is due to interference. It could be caused by several factors, including objects weather conditions, or other transmitters that operate on the same frequency. If this happens, then it could be necessary to take 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 occur if the key has been exposed to water or the battery was not removed correctly after replacing the key. Usually, you can restore the car's programming by following the steps in the owner's guide. If you're not able to accomplish this, you may seek out a professional locksmith or dealer to help you. Water damage Citroen C4 has a high level of reliability, but it is still a complex machine with hundreds of interconnected parts. Like every car it could have an issue from time to the time. In some cases, the problem is easily repaired. In other cases you may have to call for assistance or see an expert. The most common reasons for the C4 key fob not working is a dead coin battery, damage to the water, signal interference and receiver module malfunctions. Water or sweat on the circuit board of the key fob may cause water damage. The circuit could be tripped and cause an unresponsive keyfob or battery drain. Keep your key fob out of the water and put it in the plastic bag. You can also test the voltage of your battery by using an instrument. A successful test will show values between 12 and 13. If your battery fails to produce these values, it could be defective. This means you'll have to change the battery. Receiver module that is defective A defective receiver can cause the key fob to stop working. This is a typical issue for Citroen owners, since the key fob has to transmit a signal through the door handle to allow the door to be opened and start the vehicle. The key fob will not work if it doesn't transmit the signal. It has to be replaced. This is usually handled by a technician or a dealership. There are many things that can go wrong with your Citroen C4 key fob. It could be a dead coin-cell battery or signal interference or water damage. The first step in troubleshooting is to test the battery of the key fob and to check for obvious evidence of damage. This can be done by opening the keyfob, then removing its battery to get a better look. If you spot a depleted battery, replace it with a new one. Make sure the new battery has the same size, voltage, and specifications. Make sure you connect the fob before replacing it. Poor 12 volt battery Many newer cars 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 thing is that the replacement battery is affordable and easy to replace. You can use a screwdriver with a flat blade to pry the fob open or the owner's manual may contain instructions on how to do it. Replace the battery with a new one that is the same size and type as the original. Different batteries can have different voltages that could cause your fob to stop working or display a low-battery message. Be sure to align the battery in such a way that the plus and negative symbols correspond to the initial orientation. This will ensure that the chip receives the right signals. It is also possible that the issue could be due to a malfunctioning receiver module. In this case, you should contact your dealer for additional diagnostics and repairs. Unpaired keys that require Reprogramming The remote for your car's ignition may stop working due to many reasons. The majority of these issues can be quick and easy to fix. Most of the time, a dead coin-cell battery is the reason. This can be easily replaced in a matter of seconds at most auto parts shops. But, it's crucial to ensure that the new battery is properly installed. Metal retaining clips must be properly tightened and the contacts of the battery should be cleaned. A defective receiver module or signal interference, is a different possibility. If the key fob does not receive a clear signal from the receiver, it may not be able to lock or unlock the doors as well as start the vehicle or operate the hands free system. In these instances you can reset the receiver by taking off the battery for a period of time. G28CarKeys , which contain an integrated security chip that disarms the vehicle's standard immobiliser system, are more expensive than traditional metal keys and can cost as much as $500 to replace. To avoid these costly costs it's recommended to have at minimum two keys that work for your C4. This replacement remote key fob is restored and tested with new internal components before being shipped to you.