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Citroen C3 Key Fob TroubleshootingThe key fob of the Citroen C3 can stop working for many reasons. The most common reasons are worn buttons or poor contact with the battery, water damage, and receiver module issues. You should also examine the 12 volt battery.Deprogramming is a possible cause that your key fob isn’t unlocking your car. This happens when certain key sequences send a signal to the onboard computer to erase the key from its access list.Dead coin batteryIf your C3’s keys fob has stopped working, the first thing to look for is if the battery is dead. Fobs are small coin-shaped batteries which can be replaced in a few minutes. They are available at home improvement stores, and even auto parts stores. Be sure to purchase the correct battery, however. Fobs typically require CR2025 or CR2032 however, you must look through the owner’s guide to find out the specific kind of battery your vehicle requires.Before you replace the battery, take off the button pad and rub it with alcohol and cotton swabs. They will remove the corrosion and clean the contacts, which are usually colored gold. After the contacts have been cleaned, you are able to install the new battery. Be careful not to mix the two types since they differ in voltage, diameters and shapes.The next step is to examine the battery’s voltage. A multimeter set to the battery’s voltage range will give you an accurate reading. If the battery shows an amount that is above or below its threshold, it has to be replaced. You can also try getting your car started using an additional key, however it may not work in all situations. If the problem continues, go to an CITROEN dealership with your V5 registration and identification documents. A CITROEN dealer can retrieve the code for your vehicle’s immobiliser and request the replacement battery.Water damageIf the key fob is underwater, it may lose its signal to the car. It’s best to get it out as soon as possible out of the pool or puddle. Once you do, dry out the circuit board as well as you can using a cotton swab dipped in isopropyl alcohol or electronic cleaner. If it doesn’t work, it may be the right time to purchase a new key fob.Signal interference is another frequent reason for Citroen remote control not working. This can happen when there is an electrical field near the vehicle or other transmitters that operate on the same frequency. The key fob will begin to work again once you are out of the zone of interference.Lastly, the Citroen C3 key fob could be inoperable due to worn buttons, signal interference, receiver module issues and a dead 12 volt battery, or a malfunctioning electronic chip. You’ll need to have it reprogrammed when this happens. This can be done by a trained mechanic or at an Citroen dealership. If the issue is significant it is possible to replace the device. This is a fairly easy and inexpensive fix, but it’s crucial to act fast. If you put off fixing the issue, the more difficult it gets. If the issue isn’t resolved, it can be dangerous for the passengers and yourself.Issue with the Receiver moduleIf your key fob stops working, it might be because the receiver module has developed a fault. This could be due to various factors such as water damage. This can occur when you drop your keys or wash them. You can try to repair the issue by removing the chip and cleaning it with isopropyl or an electronic cleaner. This will prevent the chip from getting corroded.You can also reset the receiver module if you disconnect it from the battery, and wait 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.Another reason your key may stop working is due interference. This could be caused by other transmitters using the same frequency as your key fob, or by objects within your vehicle. If you are unable fix the issue, take your key fob to an authorized dealer to have it 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 will display the message « Key not detected. This could be a frustrating problem, especially when you’re trying to start your vehicle.Dead 12 volt batteryIf your key fob ceases working after changing the battery It could be damaged. This is especially common when the key fob is dropped or stepped on, however it can also happen following maintenance on your vehicle that requires the removal and reinstallation of panels. When these panels are removed, the wires are exposed. If your fob was damaged, it may require replacement.genuine citroen key fob replacement is that the remote is getting interference from other devices or locations. This could cause RF signals to weaken, preventing the car from being able to recognize the remote. If this happens, you can reset all computer systems on board by disconnecting the battery with 12 volts for around 15 minutes. This will take away any remaining electric current, allowing your system to restart.It is important to check the size and quality of the battery prior to replacing it. If the battery you replace isn’t big enough or has a different voltage, it could damage the circuit board inside the fob’s key. Before installing a new battery, you should clean the chip of the fob in order to eliminate any contaminants that could cause corrosion. The correct battery type will ensure that the key fob is properly sealed and protected against moisture. Once the key fob is reinstalled, it should work normally. In most cases, you can use the second key to start your car, even in the event that it displays an error message that reads « key is not detected. » It is possible to press the button a few times before it responds.