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Citroen C3 Key Fob Replacement If your C3 key fob suddenly stopped functioning it could be because of an inoperative module. If the key fob is functional, the issue may be due to something else, like water damage or a dead coin battery. The eC3 is going after the mass market and hence Citroen has been working to make the service accessible to customers. It provides a variety of services, like remote diagnostics that can be performed remotely and a specialized customer service app. Dead coin battery If the unlock button on the key fob does't function, it could be that the battery for the coin is defective. The battery should last between three and four years with regular use but it can fail abruptly. Fortunately, automakers have built-in fail-safes to ensure that you can still start and lock your vehicle even if the key fob has a dead battery. The battery in the key fob is secured by clips made of metal that form the circuit. If the clips are worn or filthy, the battery might not be able to receive the power. The battery must be the right size and type. If the battery is not big enough or large, it won't fit into the fob and won't function properly. Batteries for key fobs are sold under many names, including CR2016 and even CR2032. These batteries are not interchangeable. The best way to determine what type you should buy is to check the owner's manual or examine the fob for an inscription that contains the specific details. When you have the proper battery, you can swap it in just a few minutes. Most fobs have a slider, switch, or gap that you can use to break open the cover and exchange the original battery for an alternative. Make sure the new battery is the same size and voltage, and is inserted in the correct orientation. Water damage Water is harmful to electronics even if they've survived washing cycles or a dip. It can damage batteries and cause serious damage to the electronic chip inside. Fortunately, there are a few actions you can take to minimize the damage. It is essential to first get rid of the battery first, and then dry out the interior as possible. You can also clean the battery using a cotton swab that has been dipped into 90-percent alcohol. After cleaning the key fob you should let it dry for a few days. You can speed the process up by placing it high on a shelf, so it won't get disturbed. When you're sure the battery is dry, replace it with the new battery and use it as normal. If the key fob isn't working, it could have a problem with the receiver module that's not transmitting signals to your car. This can be quite expensive to repair, but it's worth trying to avoid a costly replacement. The most straightforward way to fix a damaged key fob is to change the battery. The radio signal will be restored and your key fob will work again after changing the battery. However, if the problem persists and you are unable to resolve it, you should seek assistance from a professional. A malfunctioning receiver module In certain situations the key fob's reception module could have a problem that hinders it from receiving and transmitting the correct signal. In this scenario, the car will not recognize the remote control key. It will not unlock or start. In this case, a replacement remote control is required. The steps to reprogram the key fob are different for each model and make therefore, you should consult the owner's manual before attempting to do it yourself. First, make sure that the battery of the key fob is in good condition and that all buttons are functioning. Also, close the doors and remove any other aftermarket devices, such as radios or alarm systems from the vehicle. G28 Car Keys can also clean the chip using isopropyl or electronic cleaner. If the chip is damaged it will likely need to be replaced. After cleaning the key fob, take it off the circuit board. Then apply alcohol swabs clean the contacts and let them air dry. Once the contacts are dry, you can reassemble and test the key fob. If the key fob still doesn't work, it might be necessary to replace the battery. Make sure you use the new battery with the same voltage as the older one. Double-check the battery's placement, as the contact points are extremely sensitive. Keyless entry system that isn't working properly The key fob can be a fantastic convenience in vehicles, but it can be frustrating when it stops working. The positive side is that most times it's simple to get it back in operation. A dead battery in the coin slot is the most frequent reason for a fob that is malfunctioning. It can be replaced within minutes. Other causes include signal interference the receiver module is defective or other electrical issues. The first thing to do is to make sure that the battery is of the correct voltage and has been properly installed. It is also important to select the right battery type. The internal circuitry of the device may be damaged if you use a battery that is not the correct size or the correct polarized. Also, you should check the fuses to make sure they are not blown or have not melted. A transponder inside the key may be damaged or gone. This will require a further diagnosis by a professional mechanic or a dealer for cars. Auto locksmiths and dealerships can reprogram the fob of the key in a vehicle for a fee. However this can be costly. If you have a spare, it might be worth trying to reprogram the fob yourself. In most cases, you can find instructions in the owner's manual. If you don't have the manual you can look up instructions online or on YouTube. It is imperative to check the owner's guide before making any repairs to the key fob.