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Citroen C3 Key Fob TroubleshootingKey fobs from Citroen can cease to function due to a number of causes. There are a variety of reasons, including worn buttons that are not in contact with the battery, water damage and receiver module problems. Check the 12 volt batteries.Deprogramming could be the reason that your key fob isn’t unlocking your car. This happens when certain button sequences send a signal to the onboard computer to remove the key from its list of access.Dead coin batteryIf the key fob on your Citroen C3 is no longer functioning, first check if the battery has failed. The batteries in the fobs are tiny, round coins that can be easily replaced within a few moments. They are available in general stores, home improvements stores, and auto parts stores. Make sure you purchase the right type. The batteries for fobs are usually CR2025 or CR2032, however you must consult the owner’s manual for your vehicle to determine which type is required.Before you replace 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. Once the contacts are cleaned, it is now time to install the new battery. Be careful not to mix the two types as they differ in their voltages and diameters.The next step is to determine the voltage of the battery. A multimeter that is set to the battery’s voltage range will give you an accurate reading. If the battery’s value is in the middle or above the threshold, then it needs to be replaced. You could also try the car’s start using a spare key, however it may not work in all cases. If the issue persists, visit a CITROEN dealer with your V5 registration certificate and personal identification documents. A CITROEN Dealer can locate the code for the immobiliser on your vehicle and purchase an upgrade to your battery.Water damageIf the key fob is submerged, it could lose its signal. If this happens, it’s a good idea to get it out of the puddle, pool or washing machine as quickly as possible. Once you do, dry out the circuit board in the best way you can using a cotton swab that has been dipped in isopropyl alcohol or electronic cleaner. If it doesn’t work it could be the time to replace your key fob.Another reason that is commonly cited for Citroen remote control c3 not working is signal interference. This can occur 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 be working normally again.The Citroen C3 key fob can not function because of worn buttons problems with signal interference, receiver module issues, a dead 12-volt battery or a malfunctioning chip. If this happens, you’ll have to have it reprogrammed by an expert. This can be done by a qualified mechanic or an Citroen dealer. If the issue is severe, you’ll need to have it replaced. It’s a fairly simple and affordable fix. But you must get it done quickly. The longer you wait to fix the issue, the more difficult it becomes. It can be dangerous to passengers and yourself in the event that the issue isn’t solved.Receiver module issueIf your key fob ceases working, it could be because the receiver module has developed a fault. Water damage is one of the many causes. It can happen when you lose your keys, or wash them. You can repair the issue by removing the chip and cleaning it with isopropyl or electronic cleaner. This will help to stop the chip from corroding.You could also try to reset the receiver module by disconnecting it from the car battery and waiting for 10 seconds. Then reconnect the battery to the vehicle and repeat the process. If this fails to fix the issue, you can go to a dealer to have it replaced.Interference can cause your key to stop working. It could be caused by other transmitters that utilize the same frequency as your key fob, or even objects in your vehicle. If you are unable to resolve the problem, you can visit a dealer and 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 isn’t right, the receiver module won’t recognize the key and will display a message that says “Key Not Detected. This could be a frustrating issue, especially when trying to start your vehicle.Dead 12 volt batteryIt is possible that your key fob has been damaged if it ceases to function after the change of batteries. This is more common in the event that your key fob has been dropped or stepped over, but can also occur following a repair that requires the removal of the panels and reinstallation. Wires are exposed as panels are removed. If your fob was damaged, it may require replacement.A fob that is receiving interference from other devices and locations is a different possibility. This could cause RF signals to become weak and prevent the car from understanding the remote. citroen ds3 replacement key cost can reset your on-board computer if this is the scenario by disconnecting your 12-volt battery for 15 minutes. This will take away any remaining electrical energy, allowing the system to restart.Before replacing the battery it’s important to make sure it’s the correct size and type. The circuit board on the fob’s key could be damaged when the battery you replace is too big or has an unrelated voltage. It is also recommended to clean any corrosive substances from the chip in the fob prior to installing the new battery. Using the right type of battery will ensure that it is sealed and shielded from moisture. Once the key fob has been reinstalled, it should function normally. In the majority of cases, you can use the second key to start your vehicle even in the event that it displays a message saying “key not detected.” You may need to press the button several times before it responds.