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Citroen C3 Key Fob Troubleshooting Citroen c3 key fob can stop working for many reasons. This includes worn buttons, poor contact with the battery, water damage, and receiver module issues. Also, you should check the 12 volt battery. Deprogramming may be the cause the key fob's inability to unlocking your car. This occurs when certain button combinations send a message to the onboard computer asking that the key be removed from its list of keys. Dead coin battery If your Citroen C3's key fob no longer works the first thing you should examine is whether the battery is dead. Fobs have small coins-shaped batteries that can be replaced in a few minutes. They are available at general stores, home improvement stores, and a few auto parts stores. Be sure to buy the correct model. Fobs usually require CR2025 or CR2032, but you should look through the owner's guide to determine the exact type of battery your vehicle requires. Before replacing the battery, remove the button pad and rub it with cotton swabs or alcohol. These will help remove corrosion and clean the contacts that are typically gold-colored. Once the contacts have been cleaned it is time to insert the new battery. Just be careful not to mix the two types as they differ in their voltages and diameters. Next, you will need to test the voltage of the battery. You can get a reliable reading using a multimeter that is calibrated to the battery's voltage range. If the battery is at an amount that is above or below its threshold, it is required to be replaced. You may also try getting your car started using an additional key, however it may not be successful in all instances. If citroen ds3 key fob replacement continues, visit a CITROEN dealership with your V5 registration and identity documents. A CITROEN Dealer can retrieve the code for your vehicle's immobiliser and order a new battery. Water damage When the key fob goes underwater, it may lose its signal to the car. If this occurs, it's a good idea to remove it of the puddle, pool, or washing machine as fast as possible. After this make use of the cotton swab along with isopropyl or electronic cleaner to dry the circuit board. If the key fob doesn't function, it might be time to buy an additional one. Another reason that can be cited the most common reason for Citroen c3 remote control not working is signal interference. This can occur when there is an electrical field close to the vehicle or other transmitters that operate on the same frequency. The key fob should begin working once you are out of the zone of interference. The Citroen c3 key fob can stop working due to worn buttons or signal interference, receiver module issues and a dead 12 volt battery, or a malfunctioning electronic chip. If this happens, you'll likely require it to be replaced by a skilled technician. This can be accomplished by a qualified mechanic or at a Citroen dealership. If the issue is serious it may be necessary to replace it. It's a simple and inexpensive fix. However, you need to act quickly. The longer you wait to correct the issue the worse it will become. It could be hazardous to passengers and you if the problem is not resolved. Receiver Module Issue If your key fob isn't functioning, the receiver module may have developed a fault. It could be caused by several things such as water damage. This can happen if you lose your keys, or wash them. You can try to solve the issue by removing and cleaning the chip using isopropyl alcohol or an electronic cleaner. This will keep the chip from getting damaged. You can reset the receiver module when you disconnect it from the battery and wait 10 seconds. Then, reconnect the battery to the vehicle and repeat the process. If this isn't enough to fix the problem, you can bring it to a dealer to be replaced. Interference can cause your key to stop working. It can be caused by other transmitters using the same frequency or objects in your vehicle. If you are unable to solve the issue, you can take your key fob in to a dealer and have it changed to a different frequency. The key fob contains a short-range radio transmitter/radio-frequency identification (RFID) chip and antenna, which sends a distinct coded signal to the receiver module in your car. If the signal isn't correct it will not recognize the car key and display a message that reads “key not recognized”. This could be a frustrating issue, especially when trying to start your vehicle. Dead 12 volt battery It is possible that the key fob you have purchased has been damaged if it stops working after changing batteries. This is most likely to happen when the key fob been thrown or stepped on, but can also occur following a repair that requires the removal of panels and then reinstallation. Wires are exposed when these panels are removed. If your fob is damaged, it might require replacement completely. Another possibility is that the fob receives interference from other devices or locations. This can make the RF signals weaker and hinder the car from recognizing the remote. It is possible to reset the onboard computer in this situation. You can do this by disconnecting the 12-volt battery for 15 minutes. This will remove any remaining power and allow the system to start over. Before replacing the battery it's crucial to ensure it's of the correct type and size. If the battery you replace isn't big enough or has an incompatible voltage, it could damage the circuit board within the key fob. You should also remove any corrosive materials from the chip in the fob prior to installing the new battery. Making sure you choose the right battery will ensure that it is sealed and shielded from moisture. Once the key fob has been reinstalled, it should function normally. In the majority of cases, you can use the second key to start your car even when it displays an error message that reads “key is not detected.” It may be necessary to press the button multiple times before it responds.