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Citroen C3 Key Fob TroubleshootingThe key fob of the Citroen C3 can not function for many reasons. Some of these include worn buttons or poor contact with the battery, water damage, and receiver module problems. Make sure the batteries are 12 volts.Deprogramming is a possible cause the key fob's inability to unlocking your car. This occurs when certain button actions send an instruction to the computer onboard to remove the key from its access list.Dead coin batteryIf the key fob on your Citroen C3 is no longer working, check first if the battery has gone out. The batteries that are in the fobs are small, round coins that can be replaced in just a few minutes. They are available at general stores, home improvement stores, and even auto parts stores. Be sure to purchase the correct type, though. The majority of fobs require CR2025 or CR2032 However, you should check the owner's manual to determine the exact kind of battery your vehicle requires.Remove the button pad and then use cotton swabs or alcohol to clean it. They will remove the corrosion and clean the contacts, which are typically gold-colored. After cleaning the contacts then you can put in the new battery. Be cautious not to mix the two kinds as they have different voltages, diameters and shapes.The next step is to determine the voltage of the battery. A multimeter that is set to the battery's voltage range will provide a precise reading. If the battery's value is in the middle or above the threshold, then it must be replaced. You could also start your car with a spare key. However, this may not always work. If the problem persists 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 then order an upgrade to your battery.Water damageIf the key fob is submerged, it could lose its signal. citroen c1 key The Keylab is recommended to remove it as soon as you can out of the pool or puddle. Once you've done that using an swab of cotton and isopropyl or electronic cleaner to clean the circuit board. If it still doesn't work then it's time for a new key fob.Another reason that is commonly cited one of the main reasons for Citroen remote control c3 not working is signal interference. It can happen when there is an electrical field in the vicinity of the car or other transmitters operating on the same frequency. Once you leave the area of interference your key fob should restart working.The Citroen C3 key fob may cease to function due to worn buttons or signal interference issues, receiver module issues as well as a dead 12-volt battery, or a defective chip. You'll need it reset when this happens. This can be done either by a qualified mechanic, or a Citroen dealer. If the issue is severe then you'll have to get it replaced. It's a relatively easy and inexpensive fix. But you have to get it done quickly. The longer you take to resolve the issue, the worse it will become. If the problem isn't addressed, it can be dangerous for passengers and you.Receiver module issueIf your key fob ceases functioning, it could be due to the receiver module having developed an issue. Water damage is among the numerous causes. This can happen when you drop your keys, or wash them. You can try to repair the issue by removing the chip and cleaning it with isopropyl and electronic cleaner. This will keep the chip from corrosion.You can also reset the receiver module by disconnecting it from the car battery and then waiting for 10 minutes. Then, reconnect the battery and repeat the procedure. If this fails to fix the issue, visit a dealership to have it replaced.Interference can also cause your key to stop working. This can be caused by other transmitters that operate on the same frequency as your key fob or even objects in your vehicle. If you are unable to fix the issue, you can take your key fob in to an authorized dealer and 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 doesn't match, the receiver module will not recognize the key and display a message that says "Key Not Detected. This is a problem that can be frustrating, especially when trying to start your vehicle.Dead 12 volt batteryIt is possible that your key fob has been damaged if it stops working after the change of batteries. This is particularly true if the key fob was dropped or stepped on. However, it also can occur after repair on your vehicle that requires the removal and reinstallation of the panels. Wires are exposed when the panels are removed. If your fob is damaged, you might require replacement completely.Another possibility is that the remote receives interference from other devices or places. This can cause RF signals to become less effective and hinder the car's recognition of the remote. If this happens, you can reset all computer systems on board by disconnecting the 12 volt battery for about 15 minutes. This will clear any residual electricity and allow the system to start over.It is essential to confirm the size and type of the battery prior to replacing it. If the replacement battery isn't big enough or has a different voltage, it could damage the circuit board in the fob's key. Before installing a battery, you should clean the chip of the fob to eliminate any corrosive substances. Using the right battery will ensure that it is sealed and protected from moisture. Once the key fob's been reinstalled, it will function normally. In most cases, you can use the second key to start your car when it displays a message saying "key not found." It is possible to press the button multiple times before it responds.