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Citroen C3 Key Fob Replacement If the key fob on your C3 stopped working all of a sudden it could be due to a faulty receiver module. If the key fob is functional, the issue may be caused by something else, like water damage or a dead coin battery. The eC3 is aimed at the mass market and Citroen has focused on making service easy for customers. It has a range of features including virtual remote diagnosis and an app specifically for customer service. Dead coin battery If the unlock button on the key fob doesn't work, it could mean that the battery in the coin is damaged. Battery life should be between three and four years with regular usage. However, it can suddenly die. Fortunately, automakers have built-in fail-safes that ensure you can still unlock and start your car even if the key fob has a dead battery. The battery in the key fob is typically held in place by metallic clips for retaining that complete the circuit. The battery may not be able to run if these clips are dirty or worn. Also, the battery needs to be of the correct size and type. If the battery is too small or too large it will not fit in the fob and will not function properly. Key fob batteries are often sold under different names, such as CR2016 and CR2032 (though they're not interchangeable). The best way to determine which one to buy is to check the manual of your owner or look at the fob to find a sticker with a label that contains the specific information. Once you've found the correct battery that you want to replace, it can be done in just a few moments. The majority of fobs have an e-slider, a switch, or a gap that can be used to open the cover and replace the battery that was used. Ensure that the new battery has the same voltage as the old one and that it is inserted correctly. Water damage Even even if your key-fob has survived the wash cycle or swimming in the pool, water isn't ideal for electronics. It can harm the chip and damage the battery. Fortunately, there are some ways to minimize the damage. First, it's important to get rid of the battery and then dry out the interior and circuit board as much as you can. You can also employ a cotton swab coated in 90 percent isopropyl ethanol to clean the battery as well as the circuit board. After cleaning the key fob you need to let it dry for a few days. You can speed up the process by placing it on a high shelf that won't be disturbed. Once you're certain that the battery is totally dry, insert a new one and use it as normal. If the key fob isn't working, it could have a malfunctioning receiver module that's not transmitting signals to your car. It can be costly to repair, but it's well worth trying to avoid having to buy a new one. The simplest solution to fix a broken key fob is to replace the battery. The radio signal will be restored and your key fob will be operational again after changing the battery. If the issue persists, you should seek assistance from a professional. Receiver module that is defective In certain situations the key fob's receiver module could be defective that stops it from receiving and transmitting the proper signal. If this is the situation, your car will not recognize your remote control key and will not allow you to unlock or start the engine. In this instance, you'll need to get an alternative. The steps required to reprogram a key fob vary by model and manufacturer So, make sure to consult the owner's manual before trying to do it yourself. The first step is to ensure that the battery on the key fob is in good working order and that all of its buttons are functioning. Also, close the doors and remove any aftermarket devices like radios or alarm systems from the vehicle. You can also clean the chip by using isopropyl or electronic cleaner. If the chip has been fried, you will have to replace it. Once you've cleaned the key fob, take it off its circuit board. Then use alcohol swabs to clean the contacts and let them dry in the air. Once the contacts have dried then you can reassemble and test the key fob. If it's not working, you may need to replace the battery. Make sure you choose a battery with the same voltage level as the battery you replaced. Verify the battery's position as the contact points of the battery are extremely sensitive. Keyless entry system that isn't working properly It can be very frustrating if the key fob stops working. The good news is that the majority times it's a breeze to get it back up and running. The most frequent cause of a malfunctioning key fob is a dead battery for the coin which is easily replaced in a matter of minutes. Other causes include signal interferance or a defective module, as well as other electrical issues. The first thing to do is to make sure that the battery is running at the correct voltage and has been properly inserted. The correct battery type is also essential. The internal circuitry of the device may be damaged if you use the wrong battery, or one that isn't the correct size or is not polarized. Examine citroen ds3 replacement key cost to determine if they are damaged or if they have melted. Another possibility is that the transponder within the key could have been damaged or gone missing. This will require a further diagnosis by a professional mechanic or a dealer for cars. Auto locksmiths and dealers will reprogram the key fobs of an automobile for a cost. However, this can be costly. If you have a spare, it could be worthwhile to try reprogramming the fob yourself. In most cases, it is possible to find instructions in your owner's guide. If you don't have the manual, you can locate instructions on the internet or on YouTube. Before attempting to fix the key fob, it is essential to read the owner's guide.