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Citroen C3 Key Fob Troubleshooting Citroen c3 key fobs can cease to function due to many reasons. Some of them include worn buttons, poor contact with the battery, water damage and receiver module problems. It is also recommended to check the 12 volt battery. Deprogramming may be the cause the key fob's not unlocking your car. This occurs when certain buttons send a message to the onboard computer, asking that the key be removed from its list of keys. Dead coin battery If your C3's keys fob isn't working, the first thing to check is if the battery is dead. The batteries that are in the fobs are tiny, round coins that can be easily replaced within a few moments. They are sold in general stores, home improvements stores, and auto parts stores. Be sure to buy the correct kind. Fobs usually require CR2025 or CR2032 However, it is recommended to refer to the owner's manual of your vehicle to find out the specific type of battery your car requires. Before replacing the battery, take off the button pad and rub it with cotton swabs and alcohol. This will help remove corrosion and clean the contacts which are typically colored gold. After the contacts have been cleaned, you can insert the new battery. Be careful not to mix the two types since they have different voltages, sizes and diameters. The next step is to test the battery's voltage. You can get a reliable reading with a multimeter that is calibrated to the battery's voltage range. If the battery's voltage is higher or lower than the threshold, it needs to be replaced. You can also try the car's start using a spare key, but this may not work in all cases. If the problem persists go to an CITROEN dealer with your V5 registration certificate and personal identification documents. A CITROEN Dealer can obtain the code for your vehicle's immobiliser and can order new batteries. Water damage If the key fob is submerged it may lose its signal. It is advised to remove it as quickly as you can from the puddle or pool. After that, dry out the circuit board as much as you can with the help of a cotton swab, dipped into isopropyl alcohol or an electronic cleaner. If it doesn't work It could be the time to replace your key fob. Another reason that can be cited the most common reason for Citroen c3 remote control not working is signal interference. It can happen when there is an electrical field near the vehicle or other transmitters operating on the same frequency. Once you have left the area of interference, your key fob will restart working. Additionally, the Citroen C3 key fob could not function due to worn buttons, signal interference, receiver module issues or a dead 12 Volt battery, or a damaged electronic chip. If this happens, you'll likely have to have it reprogrammed by an expert. This can be accomplished by a certified mechanic or a Citroen dealer. If the problem is serious it is possible to replace the device. It's an easy and inexpensive fix. But you have to get it done quickly. The longer you delay fixing the issue, the more difficult it becomes. It could be hazardous to passengers and yourself if the problem is not resolved. Issue with the Receiver module If your key fob ceases functioning, it could 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 accidentally drop your keys or wash them. It is possible to fix the problem by taking off the chip and cleaning it with isopropyl, or electronic cleaner. This will stop the chip from getting corroded. You can also reset the receiver module by disconnecting it from the car battery, and waiting for 10 minutes. Then, reconnect the battery and repeat the procedure. If this doesn't resolve the issue, you can go to a dealer to have it replaced. Another reason your key could stop working is due to interference. It can be caused by other transmitters using the same frequency, or by objects inside your vehicle. If you're unable fix the problem, you can go to a dealer to have your key fob reprogrammed. 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 it will not recognize the car key and display a message saying “key not detected”. This can be a gruelling issue, particularly when trying to start your car. Dead 12 volt battery It is possible that your key fob may have been damaged if it ceases to function after a change in batteries. This is more frequent when your key fob has been dropped or stepped upon However, it can occur following a repair that requires the removal of the panels and reinstallation. Wires become exposed when panels are removed. If your fob is damaged, you may require a complete replacement. citroen c3 replacement key that is receiving interference from other devices or locations is a second possibility. This could make RF signals weaker and prevent the car from being able to recognize the remote. If this happens you can reset all on-board computers by disconnecting the battery with 12 volts for around 15 minutes. This will eliminate any remaining electric current, allowing your system to reboot. It is essential to verify the size and type of the battery prior to replacing it. The circuit board on the fob's key could be damaged when the replacement battery is too big or has an unrelated voltage. Before you install a battery you must clean the chip inside the fob in order to eliminate any harmful substances. The correct type of battery can ensure that the key fob is sealed and protected from moisture. After the key fob has been put back in place, it should function normally. In most instances, you will be able to use the second key to start your car when it displays an error message that reads “key not recognized.” You may need to press the button several times before it responds.