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Citroen C3 Key Fob TroubleshootingCitroen key fobs may cease to function due to a variety of reasons. The most common reasons are worn buttons and poor contact with the battery, water damage and receiver module problems. Also, you should check the battery’s 12 volts.Deprogramming could be the reason that your key fob isn’t unlocking your car. This occurs when certain button combinations send an alert to the onboard computer requesting that the key be removed from its list of keys.Dead coin batteryIf your C3’s keys fob is not working the first thing you should determine is if the battery is dead. Fobs are small coin-shaped batteries which can be replaced within a few minutes. You can find these at home improvement stores, and some auto parts stores. Make sure you purchase the correct battery, however. Fobs usually require CR2025 or CR2032 however, you must check the owner’s manual to find out the specific type of battery that your car requires.Before replacing the battery, take off the button pad and rub it with cotton swabs or alcohol. This will remove any corrosion and clean the contacts that typically have a gold color. Once the contacts have been cleaned, you are able to put in the new battery. Be careful not to mix up the two types since they differ in voltage, dimensions, and shapes.The next step is to examine the battery’s voltage. A multimeter that is set to the battery’s voltage range will provide a precise reading. If the battery’s current value is higher or lower than the threshold, it should be replaced. You could also start your car with a spare key. However, this might not always work. If the issue continues, go to a CITROEN dealership with your V5 registration as well as personal identity documents. A CITROEN Dealer can retrieve the code of the immobiliser on your vehicle and purchase the replacement battery.Water damageIf the key fob is submerged, it could lose its signal. It is advised to remove it as fast as you can out of the pool or puddle. Once you do, dry out the circuit board as well as you can with an abrasive swab of cotton that’s been soaked in isopropyl ethanol or electronic cleaner. If the key fob doesn’t function, it might be time to purchase an additional one.Signal interference is another frequent reason for Citroen remote control not working. This may occur when there is a strong electrical field near the car, or from other transmitters on the same frequency. The key fob will begin working once you leave the area of interference.Additionally, the Citroen C3 key fob might stop working due to worn buttons or signal interference, receiver module issues, a dead 12 volt battery, or an indefective electronic chip. It will need to be replaced in the event of this. This can be accomplished by a qualified mechanic or at a Citroen dealership. If the issue is severe, you may need to replace the device. It’s a simple and inexpensive fix. However, you need to get it done quickly. more information delay to fix the issue, the worse it will become. If the issue isn’t resolved it could pose a danger for the passengers and yourself.Receiver Module IssueIf your key fob ceases working, it might be due to the receiver module having developed an issue. Water damage is among the many reasons. It can happen when you accidentally 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 help to stop the chip from corroding.You could also try to reset the receiver module by disconnecting it from the car battery, and waiting for 10 seconds. Then reconnect the battery to the car and repeat the procedure. If this fails to fix the issue, you can visit a dealership to have it replaced.Interference can also cause your key to stop working. This could be caused by other transmitters using the same frequency or by objects in your vehicle. If you are unable to resolve the issue, go to a dealer to have your key fob reset.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 is not correct the receiver will not recognize the car key and display a message stating “key not detected”. This could be a very frustrating issue, particularly when trying to start your vehicle.Dead 12 volt batteryIf your key fob ceases working after an upgrade to a battery the device could be damaged. This is more frequent when the key fob been dropped or stepped over, but can also occur following a repair that requires the removal of panels and reinstallation. When these panels are removed, the wires are exposed. If your fob has been damaged, it may need to be replaced entirely.A fob that receives interference from other devices and locations is another possibility. The RF signals can cause to weaken and stop the car from understanding the remote. If this happens, you can reset all on-board computers by disconnecting the battery that is 12 volts for approximately 15 minutes. This will erase any remaining power, allowing the system to reboot.Before replacing the battery it’s crucial to ensure it is the correct type and size. The circuit board in the fob’s key can become damaged if the replacement battery is too big or has an incompatible voltage. It is also recommended to clean any corrosive materials from the chip inside the fob before installing a new battery. Making sure you choose the right battery can help ensure that it is sealed and shielded from moisture. Once the key fob is been reinstalled, it should function normally. It is usually possible to use the second key even when your car displays a message that says “key not detected.” It could be necessary to press the button several times before it responds.