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Citroen C3 Key Fob TroubleshootingKey fobs from Citroen can stop working due to a variety of causes. These include worn buttons poor battery contact, water damage and issues with the receiver module. Check the 12 volt battery.Deprogramming could be the reason the key fob’s inability to unlocking your car. This happens when certain buttons send an alert to the onboard computer asking that the key be removed from its list of keys.Dead coin batteryIf your Citroen C3’s key fob no longer works The first thing you need to check is if the battery is dead. Fobs utilize small coins-shaped batteries that can be replaced in a few minutes. These can be found in general stores, home improvement stores and auto parts stores. Be sure to buy the right type. Fobs usually require CR2025 or CR2032 however, you must refer to the owner’s manual of your vehicle to see the exact type of battery that your car requires.Remove the button pad, and then use cotton swabs or alcohol to clean it. These will help remove corrosion and clean the contacts which are usually colored gold. Once the contacts are cleaned, you are able to install the new battery. Just be careful not to mix the two types as they have different voltages and sizes.The next step is to check the voltage of the battery. You can get a reliable reading with 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 will need to be replaced. You could also start your car by using a spare key. However, this may not always work. If the problem persists, visit an CITROEN dealer with your V5 registration document and personal identification documents. A CITROEN dealer can find the code of the immobiliser on your vehicle and purchase new batteries.Water damageIf the key fob is submerged it may lose its signal. If this happens, it’s a great idea to get it out of the pool, puddle or washing machine as soon as possible. After that, use an swab of cotton and isopropyl or electronic cleaner to clean the circuit board. If it still doesn’t work It could be the time to replace your key fob.citroen c1 key fob replacement that is commonly cited the most common reason for Citroen remote control c3 not working is signal interference. It can happen when there is a strong electrical field near the car, or from other transmitters on the same frequency. Once you leave the interference area, your key fob will restart working.Lastly, the Citroen C3 key fob might stop working due to worn buttons and receivers, signal interference, module issues, a dead 12 volt battery, or an indefective electronic chip. If this happens, you’ll have to have it reset by a professional. This can be done by a qualified mechanic or a Citroen dealer. If the problem is serious, you may need to replace the device. It’s a simple and affordable fix, but it’s important to act quickly. The longer you delay fixing the issue, the worse it gets. It could be hazardous to passengers and you in the event that the issue isn’t fixed.Receiver module issueIf your key fob isn’t functioning, the receiver module may have developed a fault. Water damage is one of the numerous reasons. This can happen if you drop your keys or wash them. You can fix the problem by taking off the chip and cleaning it with isopropyl or electronic cleaner. This will stop the chip from getting corroded.You can also try to reset the receiver module by disconnecting it from the car battery and then waiting for 10 seconds. You can then reconnect the battery and repeat the procedure. If this does not resolve the issue, you can take it to a dealer to have it replaced.Interference can cause your key to stop working. It could be caused by other transmitters that utilize the same frequency as your key fob, or by objects inside your vehicle. If you’re not able to fix the problem, you can go to a dealership to change the key fob’s programming.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 in order the receiver module won’t recognize the key and will display a key not detected message. This could be a frustrating issue, especially if you’re trying to start your vehicle.Dead 12 volt batteryIt is possible that the key fob you have purchased has been damaged if it ceases to function after a change of batteries. This is most likely to happen when your key fob has been thrown around or stepped on, but can also happen after a service that requires the removal of panels and the reinstallation. When the panels are removed, wires are exposed. If your fob has been damaged, it might need to be replaced entirely.A fob that is receiving interference from other devices and locations is also a possibility. The RF signals can cause to weaken, preventing the car from acknowledging the remote. If this happens you can reset all computer systems on board by disconnecting the 12 volt battery for approximately 15 minutes. This will remove any residual electrical energy, allowing the system to reboot.It is essential to verify the size and type of the battery prior to replacing it. The circuit board in the key fob can be damaged when the battery you replace is too large or has an incompatible voltage. Before installing a new battery, you must clean the chip inside the fob to remove any corrosive substances. The correct battery type will ensure that the key fob is properly sealed and protected from moisture. After the key fob has been put back in place, it should function normally. In most instances, you will be able to use the second key to start your car when it displays the message “key not detected.” It might be necessary to press the button several times before it responds.