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Citroen C4 Key Fob Replacement The Citroen C4 Picasso, a compact SUV that is small for a family is packed with truly innovative features. It has decent space for five people, and is a great way to get around town. Sometimes the key fob ceases functioning due to pairing issues. If you follow the steps correctly, this problem can be fixed quickly. However, a professional equipped with special equipment is required to fix certain types of vehicles. Dead coin battery A dead battery is the most common problem that affects remote keys. However, there is a simple solution. All you need to do is replace the battery on your coin. They are available at your local auto store and look similar to small silver coins. When you replace the battery, your vehicle should be able unlock and lock. Interference is another reason your key fob's device may not work. This could be due to several factors, including objects, weather conditions or other transmitters operating on the same frequency. If this happens, it might be necessary to remove the key from the ignition and try again. Another reason your key fob won't work could be because the fob has been deprogrammed. This can happen if the key is exposed to water or if it is not properly removed after replacing the battery. Usually, you can restore the car's programming by following the instructions provided in the owner's manual. If you're unable to do this, you can contact a professional locksmith dealer to assist you. Water damage Citroen C4 has a high degree of reliability, but it's a complicated machine with hundreds of interconnected parts. It's not uncommon for a Citroen C4 to experience a breakdown. In some cases the problem is easily resolved. In some cases, you may need to call for assistance or see a mechanic. The most frequent reasons for the C4 key fob not working are the battery being dead, signals interference, water damage and receiver module problems. Water damage can result from sweat or moisture on the circuit board. This can cause the circuit to become shorted, which can lead to the battery draining or even dead key fob. Keep your key fob out of the water and in a plastic bag. A multimeter can be used to measure the voltage in your battery. A successful test will show 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 malfunctioning receiver can cause the keyfob to stop working. This is a common issue for Citroen owners, since the key fob has to transmit a signal through the door handle to unlock and start the car. If the key fob is unable to send this signal, it won't work and must be replaced. This is usually handled by a technician or a dealership. There are a variety of things that can go wrong with your Citroen C4 key fob. This can be a dead coin-cell battery, signal interference or water damage. The first step in troubleshooting is to test the batteries on the key fob and look for obvious evidence of damage. This can be done by opening the key fob and then removing the battery to gain a better view. If you spot a depleted battery replace it with a fresh one. Make sure the new one has the same voltage, size, and specification. Also, make sure that the fob is fully snapped together before replacing it. Problematic 12 Volt Battery A majority of modern cars have key fobs that allow you to lock or unlock your vehicle remotely. These devices transmit a signal to the vehicle to control the locks. They are powered by batteries. Batteries may fail over time. The good news is that the replacement battery is inexpensive and easy to install. You can use a flat-blade screwdriver to pry open the battery or your owner's guide may contain instructions on how to do it. Replace the battery by using a different one of the same type and size as the original. Different kinds of batteries have different voltages, which can cause the fob to stop functioning or display a low battery warning. Also, make sure to position the battery in a way that the plus and minus indicators correspond to the orientation of the original. This will ensure that the chip receives the correct signals. The issue could also be caused by a faulty module. In this situation, it is recommended that you contact the dealer for further assistance and repairs. Unpaired keys that require Reprogramming Car key remotes may cease to function due to different reasons. The majority of these issues are easily and quickly fixed. The most frequent cause is an old coin battery, which can be replaced in just a couple of minutes at most auto parts stores. It is essential that the new battery be installed correctly. Metal clips for retaining must be properly tightened, and the contacts of the battery must be cleaned. A defective receiver module or signal interference is another possibility. If G28 fob isn't receiving a sufficient signal from the receiver, it might not lock or unlock doors, start the car or use the hands-free system. In these instances, you can reset the receiver by dismantling the battery for a period of time. Smart keys are more expensive and could cost as high as $500 to replace. They contain a security chip that disables the standard immobiliser in your vehicle. To avoid these high costs it's best to have at least two keys that work for your C4. This replacement remote key fob is refurbished and tested with new internal components before being sent to you.