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Citroen C3 Key Fob Troubleshooting The key fob of the Citroen C3 can stop working for different reasons. The most common reasons are worn buttons that are not in contact with the battery, water damage, and receiver module problems. You should also check the battery's 12 volts. If the key fob can not unlock your car, you might be experiencing deprogramming. 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 Citroen C3's main fob no longer works, the first thing to look for is if the battery is dead. Fobs use small coin-shaped batteries which can be replaced in a few minutes. They can be found in general stores, home improvements stores, and auto parts stores. Make sure you purchase the correct type, though. Batteries for fobs are usually CR2025 or CR2032, however, you should consult the owner's manual for your vehicle to determine what type is required. Take off the button pad and then use cotton swabs or alcohol to clean it. These will help remove corrosion and clean the contacts which are usually colored gold. After cleaning the contacts, you can insert the new battery. Be careful not to mix up the two batteries as they differ in voltage, dimensions, and shapes. The next step is to assess the voltage of the battery. You can get a reliable reading using a multimeter that is set to the battery voltage range. If the battery shows a voltage that is higher or lower than its threshold, it will need to be replaced. You may also be able to start your car with a spare keys. However, this may not always work. If the problem persists visit a CITROEN dealership with your V5 registration as well as personal identification documents. A CITROEN Dealer can locate the code for your vehicle's immobiliser and can order new batteries. Water damage If 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, use a cotton swab, isopropyl or electronic cleaner to dry the circuit board. If the circuit board is still not working It could be time to get a new key fob. Signal interference is a common reason for Citroen remote controls not working. This can occur when there is an electrical field close to the car or other transmitters that operate 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 can stop working because of worn buttons or signal interference issues, receiver module issues as well as a dead 12-volt battery or a damaged chip. You'll need it reprogrammed in the event of this. This can be done by a certified mechanic or a Citroen dealer. If the issue is significant the vehicle will need to be it replaced. It's an easy and inexpensive fix. But you must take action quickly. The longer you delay to address the issue, the more severe it will be. If the issue doesn't get resolved it could be a risk for the passengers and yourself. Receiver Module Issue If your key fob isn't working, the receiver module may have developed a fault. It could be caused by many things, including water damage. This could happen if you drop your keys, or wash them. You can try to fix it by removing the chip and cleaning it with isopropyl, or electronic cleaner. This will help to keep the chip from getting damaged. 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 doesn't fix the issue, go to a dealership and have it replaced. Interference can also cause your key to stop working. It can be caused by other transmitters operating on the same frequency or objects in your vehicle. If citroen car key replacement cost uk to solve the issue, bring your key fob to an authorized dealer and have it 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 isn't correct it will not recognize the car key and display a message saying “key not recognized”. This can be a frustrating problem especially when you attempt to start your vehicle. Dead 12 volt battery It is possible that your key fob may have been damaged if it stops working after a change of batteries. This is more common when your key fob has been thrown or stepped on or stepped on, but it could also occur after a service that requires the removal of panels and the reinstallation. Wires are exposed as panels are removed. If your fob has been damaged, it may require replacement completely. A fob that is receiving interference from other devices or locations is a second possibility. This could cause RF signals to weaken and stop the car from recognizing the remote. You can reset the onboard computer if this is the situation, by disconnecting the 12-volt battery for 15 minutes. This will erase any remaining electric current, allowing your system to restart. Before replacing the battery it is important to ensure that it's the right type and size. The circuit board that is inside the key fob can be damaged in the event that the replacement battery is too big or has an unrelated voltage. Before installing a battery you should clean the chip of the fob to remove any corrosive substances. Using the right battery can help ensure that it is sealed and protected from moisture. Once the key fob is been reinstalled, it will function normally. In the majority of instances, you will be able to use the second key to start your car even when it displays a message saying “key not recognized.” You may need to press the button a few times before it responds.