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Citroen C3 Key Fob TroubleshootingThe key fob of the Citroen C3 can cease to function due to different reasons. These include worn buttons poor contact with the battery, water damage, and receiver module issues. It is also recommended to check the 12 volt battery.If the key fob does not unlock your car, you might be experiencing deprogramming. This occurs when certain button combinations send an electronic message to the computer asking that the key be removed from its list of keys.Dead coin batteryIf the key fob on your Citroen C3 is no longer functioning, first check if the battery has gone out. Fobs are small, coin-shaped batteries that can be replaced in just a few minutes. You can find these in general stores, home improvement stores, and some auto parts stores. Make sure you buy the correct type, though. citroen c1 remote programming require CR2025 or CR2032 However, you should consult your owner’s manual to determine the type of battery that your car requires.Remove the button pad and then use cotton swabs or alcohol to clean it. They will remove the corrosion and clean the contacts, which are usually gold colored. After cleaning the contacts then you can put in the new battery. Just be careful not to mix the two batteries because they differ in their voltages and diameters.The next step is to check the battery’s voltage. You can obtain a precise reading using a multimeter that is set to the battery’s voltage range. If the battery is at an amount that is above or below its threshold, it needs to be replaced. You may also try getting your car started using a spare key, but this may not be effective in all cases. If the issue continues go to an CITROEN dealer with your V5 registration certificate and personal identification documents. A CITROEN Dealer can obtain the code of your vehicle’s immobiliser and can order a new battery.Water damageWhen the key fob goes submerged, it could lose its signal to the car. If this happens, it’s a good idea to pull it out of the pool, puddle, or washing machine as fast as you can. After this, use the cotton swab along with isopropyl or electronic cleaner to clean the circuit board. If the circuit board is still not working, it may be time for a new key fob.Signal interference is a common reason for Citroen remote control not working. It can happen when there is an electrical field close to the car or other transmitters using the same frequency. Once you have left the area of interference, your key fob will begin working again.The Citroen C3 key fob could be inoperable due to worn buttons signals, signal interference issues receiver module problems or a dead battery or a defective chip. It will need to be replaced in the event of this. This can be accomplished by a qualified mechanic, or an Citroen dealer. If the issue is severe you may have to replace it. This is a fairly easy and cost-effective fix, however it’s imperative to act swiftly. The longer you wait to fix the issue, the more serious it becomes. If the issue isn’t fixed it could be a risk for the passengers and yourself.Receiver Module IssueIf your key fob ceases functioning, it could be because the receiver module has developed a fault. This can be caused by a number of things such as water damage. This can happen when you lose your keys or wash them. You can try to fix it by removing the chip and cleaning it with isopropyl and electronic cleaner. This will help to prevent corrosion of the chip.You can reset the receiver module when you disconnect it from the battery for 10 seconds. Then, reconnect the battery to the car and repeat the process. If this does not resolve the issue, you can take it to a dealership to be replaced.Another reason why your key could stop working is due interference. It could be caused by other transmitters operating on the same frequency or by objects inside your vehicle. If you’re not able to fix the issue, you can take your key fob to an authorized dealer and have it reset.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 doesn’t match, the receiver module won’t recognize the key and will display a message that says “Key Not Detected. This is a problem that can be frustrating, especially when trying to start your vehicle.Dead 12 volt batteryIt is possible that your key fob is damaged if it stops working after a change in batteries. This is most likely to happen when the key fob is dropped or stepped on. However, it can also happen after service on your car that requires removal and reinstallation of panels. When these panels are removed, the wires are exposed. If your fob has been damaged, it may require replacement.A fob that receives interference from other devices and locations is another possibility. This can cause RF signals to become weak and prevent the car from acknowledging the remote. It is possible to reset the onboard computer in this scenario by disconnecting your 12-volt battery for 15 minutes. This will clear any residual electricity and allow the system to begin again.It is essential to confirm the size and quality of the battery before replacing it. The circuit board inside the fob’s key can become damaged if the replacement battery is too large or has an incompatible voltage. Before installing a battery you must clean the chip inside the fob to remove any contaminants that could cause corrosion. The proper type of battery will ensure that the key fob is properly sealed and shielded from moisture. Once the key fob has been reinstalled, it will function normally. In most instances, you will be able to use the second key to start your vehicle even when it displays a message saying “key not detected.” It is possible to press the button several times before it responds.