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Citroen C3 Key Fob TroubleshootingCitroen key fobs can stop working due to a number of reasons. They can be due to worn buttons, poor battery contact, water damage and receiver module issues. You should also examine the 12 volt battery.Deprogramming is a possible cause the key fob’s inability to unlocking your car. This happens when certain key sequences send an indication to the computer in the car to delete the key from its list of access.Dead coin batteryIf your Citroen C3’s key fob no longer works the first thing to examine is whether the battery is dead. The batteries inside the fobs are tiny, round coins that can be easily changed in a matter of seconds. These can be found in general stores, home improvements stores and auto parts stores. Make sure you purchase the correct type, though. Fobs typically require CR2025 or CR2032 However, you should 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 using cotton swabs and alcohol. They will remove the corrosion and clean the contacts which are usually colored gold. After the contacts have been cleaned it is time to insert the new battery. Be careful not to mix the two types because they have different diameters and voltages.Next, replacement car keys citroen will need to determine the voltage of the battery. You can get an accurate reading using a multimeter, which is calibrated to the battery’s voltage range. If the battery is at the value that is either above or below its threshold, it needs to be replaced. You can also try getting your car started using a spare key, however this might not be effective in all cases. If the issue persists, go to an CITROEN dealership with your V5 registration and identity documents. A CITROEN dealer can locate the code for your vehicle’s immobiliser and purchase the replacement battery.Water damageIf the key fob is submerged it could lose its signal. If this happens, it’s a great idea to fish it out from the pool, puddle or washing machine as fast as possible. After that using an swab of cotton and isopropyl or electronic cleaner to dry the circuit board. If the key fob still doesn’t function, it might be time to invest in an additional one.Another reason that can be cited the most common reason for Citroen remote control c3 not working is signal interference. This may occur when there is an intense electrical field that is close to the vehicle, or from other transmitters on the same frequency. The key fob should begin to function again after you are out of the zone of interference.The Citroen C3 key fob might cease to function due to worn buttons signals, signal interference, receiver module issues or a dead 12 Volt battery, or a malfunctioning electronic chip. If this happens, you’ll probably require it to be reset by a professional. This can be done either by a qualified mechanic or an Citroen dealer. If the issue is severe then you’ll have to get it replaced. This is a simple and affordable fix, but it’s important to act quickly. The longer you take to resolve the issue, the more serious it will get. It could pose a risk to passengers and yourself If the issue isn’t fixed.Receiver module issueIf your key fob isn’t working the receiver module could have developed an issue. This can be caused by several things such as water damage. It can happen when you lose your keys, or wash them. You can repair the issue by removing the chip and cleaning it with isopropyl or electronic cleaner. This will stop the chip from corroding.You can 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 doesn’t resolve the issue, you can visit a dealership to have it replaced.Interference can cause your key to stop working. This could be caused by other transmitters using the same frequency as your key fob or by objects in your vehicle. If you’re not able to fix the issue, 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 doesn’t match, the receiver module will not recognize the key and will display the message “Key not detected. This can be a frustrating problem, especially when trying to start your car.Dead 12 volt batteryIt is possible that your key fob may have been damaged if it stops working after changing batteries. This is most likely to happen when the key fob is dropped or stepped on, however it also can occur after service on your car that requires the removal and reinstallation of panels. When these panels are removed, the wires are exposed. If your fob has been damaged, it may require replacement.Another possibility is that the fob is receiving interference from other devices or locations. This could cause the RF signals to weaken and block the car from being able to recognize the remote. It is possible to reset the onboard computer if this is the situation. You can do this by disconnecting the 12-volt battery for 15 minutes. This will remove any residual electric current, allowing your system to restart.Before replacing the battery, it’s important to make sure that it’s the right type and size. The circuit board in the fob’s key can become damaged when the replacement battery is too large or has an incompatible voltage. You should also remove 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 properly sealed and shielded from moisture. Once the key fob is reinstalled, it should work normally. You should be able to use the second key even the car displays a message that reads “key is not recognized.” It is possible to press the button several times before it responds.