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Citroen C3 Key Fob TroubleshootingCitroen c3 key fobs can cease to function due to different reasons. These include worn buttons, poor contact with the battery, water damage and receiver module problems. Also, you should check the 12 volt battery.Deprogramming could be the cause that your key fob isn’t unlocking your car. This happens when certain key sequences send an alert to the onboard computer to remove the key from its list of access.Dead coin batteryIf the key fob on your Citroen C3 is no longer working, check first if the battery has failed. Fobs have small coin-shaped batteries which can be replaced in just a few minutes. You can find these at home improvement stores, and some auto parts stores. Make sure you purchase the correct model, however. Fobs typically require CR2025 or CR2032, but you should consult your owner’s manual to see the exact type of battery your vehicle requires.Before replacing the battery, take off the button pad and rub it with alcohol and cotton swabs. These will help remove corrosion and clean the contacts which are usually colored gold. Once the contacts are cleaned then you can put in the new battery. Be careful not to mix up the two kinds as they have different voltages, sizes and diameters.The next step is to determine the voltage of the battery. citroen berlingo replacement key cost that is set to the battery’s voltage range will give you an accurate reading. If the battery’s voltage is either above or below the threshold, it should be replaced. You may also be able to start your car using a spare key. However, this may not always work. If the problem continues, go to an CITROEN dealership with your V5 registration as well as personal identification documents. A CITROEN Dealer can retrieve the code of your vehicle’s immobiliser and can order an upgrade to your battery.Water damageWhen the key fob gets underwater, it may lose its signal to the car. If this happens, it’s a great idea to fish it out of the puddle, pool or washing machine as fast as possible. After this then use a cotton swab, isopropyl or electronic cleaner to dry the circuit board. If the key fob still isn’t working, it may be time to get an additional one.Signal interference is another common reason for Citroen remote controls not working. This could happen when there is a strong electrical field in the vicinity of the vehicle, or from other transmitters operating on the same frequency. Once you have left the interference area your key fob should restart working.The Citroen C3 key fob might not function because of worn buttons or signal interference issues, receiver module problems or a dead battery or a damaged chip. You’ll need to have it reset in the event of this. This can be done by a trained mechanic or at a Citroen dealership. If the issue is severe it is possible to replace the device. This is a relatively simple and cost-effective fix, however it’s essential to act quickly. The longer you take to resolve the issue, the more deteriorated it becomes. If the issue isn’t resolved it could be a risk for passengers and you.Receiver module issueIf your key fob isn’t working the receiver module could have developed a fault. This could be due to a number of things such as water damage. This can occur when you drop your keys or wash them. It is possible to fix the problem by taking off the chip and cleaning it with isopropyl and electronic cleaner. This will keep the chip from becoming corroded.You can also reset the receiver module when you disconnect it from the battery and then wait 10 seconds. Then reconnect the battery to the car and repeat the procedure. If this doesn’t fix the issue, you can go to a dealer to have it replaced.Interference can also cause your key to stop working. It could be caused due to other transmitters that operate on the same frequency as your key fob or by objects in your vehicle. If you’re not able to fix the issue, take your key fob in to a dealer to be replaced.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, the receiver module won’t recognize the key and display the message “Key not detected. This can be a gruelling problem, especially when you’re trying to start your vehicle.Dead 12 volt batteryIt is possible that your key fob is damaged if it stops working after the change of batteries. This is particularly true in the event that the key fob was dropped or stepped on, however it also can occur after servicing on your car that requires removal and reinstallation of the panels. When these panels are removed, the wires are exposed. If your fob is damaged, it might require replacement completely.Another possibility is that the remote is getting interference from other devices or locations. The RF signals can cause to become weak and prevent the car from being able to recognize the remote. If this is the case it is possible to reset all on-board computers by disconnecting the 12 volt battery for about 15 minutes. This will eliminate any remaining electricity, allowing the system to reboot.It is crucial to determine the size and quality of the battery prior to replacing it. If the battery you replace isn’t big enough or has an unsuitable voltage, it could damage the circuit board within the key fob. You should also clean any corrosive material from the chip inside the fob prior to installing a new battery. Using the right battery will ensure that it is properly sealed and shielded from moisture. Once the key fob is installed, it will function normal. You can usually use the second key in the event that your vehicle displays a message that says “key not detected.” You may have to press the button several times before it responds.