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Citroen C3 Key Fob Replacement If your C3's key fob stopped working all of a sudden it could be due to a malfunctioning receiver module. If the key fob's function is functional, the issue could be due to something else, such as water damage or a dead coin battery. The eC3 is going after the mass market, and Citroen has worked on making the service accessible to customers. It comes with a variety of features, including virtual remote diagnosis and an app that is specifically designed for customer service. Dead coin battery If the key fob's unlock button is not functioning, there could be an issue with the coin battery. The battery should last between three and four years if used regularly however, it could die unexpectedly. The car makers have developed fail-safes which allow you to lock and start your car even if your key fob is dead. The battery on the key fob is secured by clips made of metal that form a circuit. The battery may not be charged if the clips are dirty or worn. The battery must also be the right size and type. The battery won't fit in the fob if it's too big or too small. Batteries for key fobs are available under various names, including CR2016 and even CR2032. These batteries are not interchangeable. Read the owner's guide for your particular model or look for a sticker on the fob with the information. When you've got the proper battery and it's replaced, it's possible to replace it in a matter minutes. Most fobs come with an e-slider, a switch or a gap that can be used to pry the cover open and replace the old battery. Make sure the new battery has the same voltage as your old one and that it is inserted correctly. Water damage Water can be harmful to electronics even if they've survived washing cycles or a dip. citroen c4 key fob programming can damage the chip and ruin a battery. There are a few steps you can do to limit the damage. It's crucial to first eliminate the battery first, and then dry out the interior as much as you can. You can also clean the battery using a cotton swab which has been submerged in 90 percent alcohol. After cleaning the key fob it is recommended to dry it for a few days. You can speed the process up by placing it high on a shelf so that it won't get disturbed. After you've confirmed that it's bone dry put in a new battery and operating it as normal. If the key fob still isn't working, it could have a defective receiver module that isn't able to transmit signals to your car. It can be expensive to fix, but it's worth it if you don't need to replace your vehicle. The most effective method to fix a damaged key fob, is to replace the battery. Changing the battery should restore the radio signal and make the key fob work again. However, if the problem persists and you are unable to resolve it, you should seek professional help. Faulty receiver module In some instances there may be a problem with the receiver module of the key fob could hinder it from receiving or transmitting the correct signals. In this case, the car will not recognize the remote control key. It will not unlock or start. In this case you'll need an alternative. The steps for reprogramming the key fob are different for each model and manufacturer therefore, you should consult the owner's guide before trying to do it yourself. First, check that the battery on the key fob is in good working order and that all buttons are working. Also, shut the doors and disconnect any additional devices such as radios or alarm systems from the vehicle. You can also clean the chip with isopropyl or electronic cleaner. If the chip has become damaged, you'll have to replace it. After cleaning the key fob, remove the circuit board. Then, clean the contacts using alcohol swabs, and let them dry. Once the contacts are dry, you can put them back together and test the key fob. If it doesn't work it may be necessary to replace the battery. Choose a new battery that has the same voltage as the battery you replaced. Check the battery's location, as the contact points of the battery are very sensitive. Faulty keyless entry system The key fob is a wonderful convenience in cars, but it can be frustrating when it stops working. The good news is that the majority of the time it's a breeze to get it working again. The most frequent cause of a malfunctioning key fob is a dead coin battery, which can be replaced in a matter of minutes. Other reasons include signal interference or a malfunctioning module and other electrical issues. The first thing to do is to ensure that the battery has the correct voltage and is properly placed. It is also important to select the correct battery type. Using an incorrectly sized or polarized batteries could harm the internal circuitry. Check the fuses for damage or if they have burned. Another possible problem is that the transponder inside the key may have been damaged or destroyed. This will require a an investigation by a professional mechanic or car dealer. Many dealerships and auto locksmiths can reprogram the car's key fob for a fee, however it can be costly. It might be worth it to reprogram your spare fob, if you have one. You will usually find the instructions in the owner's manual. If you don't have the manual, you can locate instructions on the internet or on YouTube. Before you attempt to fix the key fob, it is vital to refer to the owner's manual.