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Citroen C3 Key Fob Troubleshooting The Citroen c3 keyfob may stop working for a variety of reasons. These include worn buttons, poor contact between the battery and the water, and receiver module issues. You should also check the 12 volt battery. Deprogramming may be the cause the key fob's inability to unlocking your car. This occurs when certain buttons send an indication to the onboard computer to remove the key from its access list. Dead coin battery If your C3's keys fob isn't working, the first thing to look for is if the battery is dead. The batteries contained in the fobs are tiny, round coins that can be easily replaced in just a few minutes. They are sold in general stores, home improvements stores, and auto parts stores. Be sure to buy the correct model. Batteries for fobs are typically CR2025 or CR2032 However, you should consult the owner's manual for your vehicle to determine which type is required. Take off the button pad and then use cotton swabs or alcohol to clean it. This will help remove corrosion and clean the contacts, which are typically colored gold. Once the contacts have been cleaned, you can then put in the new battery. Be careful not to mix the two types as they differ in their voltages and diameters. Next, you will need to test the voltage of the battery. You can get a precise reading using a multimeter, which is calibrated to the battery's voltage range. If the battery shows the value that is either above or below its threshold, it will need to be replaced. You could also try the car's start using an extra key, but this might not be effective in all cases. If the issue continues you should visit an CITROEN dealer with your V5 registration certificate and personal identifi cation documents. A CITROEN Dealer can locate the code for the immobiliser on your vehicle and purchase the replacement battery. Water damage When the key fob goes submerged, it could lose its signal to the car. It's best to remove it as fast as possible from the pool or puddle. After that, dry out the circuit board in the best way you can with a cotton swab dipped in isopropyl alcohol, or electronic cleaner. If the key fob isn't working, it could be time to get a new one. Another common cause the most common reason for Citroen remote control c3 not working is signal interference. This can happen when there is an electrical field near the car or other transmitters operating on the same frequency. Once you have left the area of interference your key fob will start working again. citroen c3 key replacement www.thekeylab.co.uk may cease to function due to worn buttons signals, signal interference issues receiver module problems as well as a dead 12-volt battery, or a defective chip. It will need to be changed to a new program if this happens. This can be done by a qualified mechanic or a Citroen dealer. If the issue is severe it may be necessary to replace the device. It's a simple and inexpensive fix. However, you need to take action quickly. The longer you put off taking action to fix the issue, the worse it will become. It could be dangerous for you and your passengers in the event that the issue isn't solved. Issue with the Receiver module If your key fob stops working, it might be because the receiver module has developed an issue. Water damage is one of the many reasons. It can happen when you drop your keys, or wash them. It is possible to solve the problem by removing your chip and cleaning it with isopropyl or an electronic cleaner. This will help to avoid the chip from becoming damaged. You can also reset the receiver module by disconnecting it from the car battery and letting it sit for 10 minutes. Then, reconnect the battery and repeat the process. If this doesn't fix the issue, go to a dealer to have it replaced. Interference can cause your key to stop working. This could be caused by other transmitters operating on the same frequency or objects inside your vehicle. If you are unable fix the issue, take your key fob to a 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 isn't correct, the receiver module won't recognize the key and will display an error message that states the key is not detected. This can be a gruelling issue, especially if you're trying to start your car. Dead 12 volt battery It is possible that your key fob has been damaged if it ceases to function after a change in batteries. This is particularly true when the key fob has been dropped or stepped on, however it can also happen following service on your car that requires removal and reinstallation of the panels. Wires become exposed when panels are removed. If your fob is damaged, you may have to replace it completely. Another possibility is that the fob may be receiving interference from other devices or locations. This can make the RF signals weaker and prevent the car from recognizing the remote. You can reset the on-board computer if this is the scenario by disconnecting your 12-volt battery for 15 minutes. This will erase any remaining electrical energy, allowing the system to reboot. It is crucial to determine the size and type of the battery before replacing it. The circuit board inside the fob's key could be damaged when the replacement battery is too big or has an incompatible voltage. You should also remove any corrosive materials from the chip inside the fob before installing a new battery. The correct battery type will ensure that the key fob is sealed and protected against moisture. Once the key fob has been reinstalled, it will function normally. You can usually use the second key even the car displays a message saying “key not found.” It might be necessary to press the button multiple times before it responds.