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Citroen C4 Key Fob Replacement The Citroen C4 Picasso, a compact SUV/small family car that is truly innovative, comes with some great features. It's big enough to accommodate five people, and is a great vehicle to travel around town. Sometimes, a keyfob can cease to function due to pairing problems. If you follow the steps properly, this issue can be fixed quickly. For certain vehicles, a professional may require specialized tools. Dead coin battery A dead battery is the most frequent issue with remote key fobs. It is an easy fix, however. You just need to replace the coin-sized battery. They are available at your local auto retailer and resemble small silver coins. Once you have replaced the battery, you'll be able to lock and unlock your car. Another reason your key fob may not function is due to interference. This can be caused by many reasons, including objects, weather conditions, or other transmitters on the same frequency. If this happens, it might be necessary to remove the key from the ignition and try again. The fact that your key fob is not programmed could be the reason for the failure of the key to function. This could happen if the key has been exposed to water, or the battery is not removed correctly after the key is replaced. It is usually possible to restore the programming by following the steps in the owner's manual. If you are unable do this, contact a professional locksmith dealer to help you. Water damage Citroen C4 has a high level of reliability, however it's a complicated machine with hundreds of interconnected parts. It's not common for a car like the Citroen to experience a malfunction. In some cases, the issue can be easily fixed. But in others you may need to see a mechanic or call for assistance. The most common causes of the C4 key fob not working is a dead coin battery, signals interference, water damage and receiver module problems. Moisture or sweat on the circuit board of the key fob can cause water damage to the circuit board of the key fob. This could cause a short circuit in the circuit, resulting in the key fob becoming dead or causing battery drain. To avoid this happening, try to keep your key fob out from water or put it in a bag before using it. You can also check the voltage of your battery by using an instrument. A successful test will give values between 12 and 13. If your battery isn't producing these values, it may be defective. This means that you'll have to replace the battery. Faulty receiver module A faulty receiver can cause the keyfob to cease working. This is a common problem for Citroen owners, as the key fob has to send a signal to the door handle to open and start the car. If the key fob fails to send this signal, it won't function and will need to be replaced. This is usually done by a mechanic or a dealership. There are several different possibilities for problems with your Citroen C4 key fob. This can be a dead coin-cell battery, damage to the signal or water. The first step to troubleshoot is to test the key fob's batteries and look for obvious indications of damage. This can be done by opening the keyfob, then removing its battery to take a closer view. If you discover a depleted battery, replace it with a new one. Be sure the new battery has the same size, voltage, and specification. Make sure you snap the fob together before replacing it. Poor 12 volt battery Many modern vehicles come with key fobs that allow you to lock or unlock the vehicle remotely. These devices send an electronic signal to the vehicle to control the locks. They are powered by batteries. However, the batteries could fail over time. The good news is that the replacement battery is inexpensive and simple to install. You can take the fob off with a flat-bladed screwdriver. Or you can get instructions in your owner's guide. When replacing the battery, be sure that you're using a battery that's the same type and size as the original. Different types of batteries have different voltages, which can cause the fob's function to cease or display a low battery warning. Be sure to align the battery in a way that the plus and minus signs correspond to the orientation of the original. This will ensure that the chip is receiving the proper signals. how to open a citroen key fob is also possible that the issue could result from a malfunctioning receiver module. In this case it is recommended that you contact the dealer for further assistance and repairs. Unpaired keys that need Reprogramming The remote for the car key can fail to function due to many reasons. The majority of these issues can be easily and quickly repaired. Most often the problem is caused by a defective battery in the coin-cell. is the cause. This can be replaced in just a few seconds at most auto parts shops. It is essential that the new battery is installed correctly. Metal retaining clips should be properly tightened and contacts of the battery need to be cleaned. A defective receiver module or signal interference is a second possibility. If the key fob does not receive a strong signal from the receiver, it could not unlock or lock the doors, start the vehicle or operate the hands free system. In such cases you can try to reset the receiver by disconnection of the battery for a few minutes. Smart keys, that have an integrated security chip that disables the car's standard immobiliser system, are more expensive than traditional metal keys and can cost upwards of $500 to replace. To avoid these costs it's a good idea to have at least two keys that work for your C4. This key fob for replacement is refurbished with new internal components and tested before being sent to you.