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Citroen C3 Key Fob Troubleshooting Citroen key fobs may cease to function due to a variety of reasons. The most common reasons are worn buttons or poor contact with the battery, water damage and receiver module issues. Make sure the batteries are 12 volts. If the key fob can not unlock your car, you may be experiencing deprogramming. This occurs when certain button actions send a signal to the onboard computer to erase the key from its list of access. Dead coin battery If the key fob on your Citroen C3 is no longer working, first determine if the battery is dead. Fobs utilize small coin-shaped batteries which can be replaced within a few minutes. They are available in general stores, home improvement stores, and auto parts stores. Be sure to purchase the correct model, however. The majority of fobs require CR2025 or CR2032 However, you should refer to the owner's manual of your vehicle to find out the specific kind of battery your vehicle requires. Before you replace the battery, remove the button pad and rub it with cotton swabs and alcohol. This will help remove corrosion, and clean the contacts, which are typically gold-colored. Once the contacts have been cleaned, you can then insert the new battery. Be cautious not to mix the two batteries as they differ in voltage, diameters and shapes. Next, you will need to determine 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's value is in the middle or above the threshold, it needs to be replaced. You could also start your car with a spare key. However, this may not always work. If the problem continues, go to an CITROEN dealership with your V5 registration number and personal identity documents. A CITROEN dealer can locate the code for your vehicle's immobiliser system, and get an alternative battery. Water damage If the key fob falls under water, it could lose its signal to the car. If this happens, it's a good idea to remove it from the pool, puddle or washing machine as fast as you can. Once you have done that dry the circuit board as best you can with a cotton swab dipped in isopropyl ethanol or electronic cleaner. If the key fob still does not work, it may be time to purchase a new one. Another reason that can be 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 near the vehicle or other transmitters operating on the same frequency. When you leave the area of interference the key fob will be working normally again. Additionally, the Citroen C3 key fob may be inoperable due to worn buttons and receivers, signal interference, module issues, a dead 12 volt battery, or a defective electronic chip. It will need to be changed to a new program if this happens. This can be done by a certified mechanic or at a Citroen dealership. If the issue is serious, you'll need to have it replaced. It's a simple and affordable fix. But you have to be quick to act. The longer you take to correct the issue the more deteriorated it becomes. If the problem isn't addressed the issue could be a hazard for the passengers and yourself. Receiver Module Issue If your key fob is not functioning it could be because the receiver module might have developed a fault. Water damage is among the many reasons. This can happen if you drop your keys or wash them. It is possible to fix it by removing the chip and cleaning it with isopropyl, or electronic cleaner. This will help to stop the chip from corroding. You can also reset the receiver module if you disconnect it from the battery for 10 seconds. You can then reconnect the battery and repeat the process. If this doesn't fix the issue, take it to a dealership to be replaced. Another reason your key could stop working is due interference. This could be caused by other transmitters that use the same frequency as your key fob, or by objects within your vehicle. If you are unable solve the issue, you can take your key fob in to a dealer and have it changed to a different frequency. 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 frustrating problem, especially when trying to start your car. Dead 12 volt battery If your key fob ceases working after the battery has been changed It could be damaged. This is particularly true when the key fob has been dropped or stepped upon, but it could also occur following service on your car which requires the removal and reinstallation of panels. When the panels are removed, the wires are exposed. If your fob is damaged, you might have to replace it completely. Another possibility is that the remote is getting interference from other devices or locations. click now can cause RF signals to weaken and block the car from recognizing the remote. You can reset the on-board computer in this situation, by disconnecting the 12-volt battery for 15 minutes. This will erase any remaining electric current, allowing your system to restart. It is essential to verify the size and quality of the battery before replacing it. The circuit board in the fob's circuit board could be damaged when the replacement battery is too large or has an unrelated voltage. You should also remove any corrosive materials off the chip inside the fob prior to installing a new battery. Using the right type of battery will ensure that it is properly sealed and shielded from moisture. After the key fob has been put back in place, it should function normally. It is possible to use the second key even in the event that your vehicle displays a message saying “key is not recognized.” You may need to press the button several times before it responds.