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Reasons Your Fiat 500 Key Fob Won't Work A key fob for the Fiat 500 is a convenient method to unlock the doors and get started the car. However, there are numerous reasons why the key fob might stop functioning. fiat doblo key programming thekeylab.co.uk could be due to a dead battery or water damage, problems with the receiver modules, and interference. This listing is for a NEW replacement Fiat Flip Key Remote that looks like the Ilco brand. It has to be professionally programmed (click here to find local locksmiths for your vehicle). It comes with lock, unlock and trunk buttons. Dead Coin Battery A dead battery is probably the most common cause of your 500 key fob being inoperative. Modern key fobs have limited operating range and must be within just a few inches of the vehicle to work. If you're far away from your vehicle when you press the key fob button, the car won't respond and will display an “Key Fob Not Detected” message in the instrument cluster. If this happens If this happens, replace the battery in the coin-cell (Part Number CR2032) by a brand new one from a reputable brand such as Panasonic Duracell or Energizer. You can usually find them in your local hardware store, or online. After you've replaced the battery of your coin cell You can test it by standing next to your Fiat 500 and pressing the buttons. The parking lights should light up and the key fob will operate the lock and unlock switch. If your key fob still isn't working even after replacing the battery, there may be water damage which hinders it from connecting to the module inside your vehicle. Water damage can happen in a variety of ways, such as simply splashing or submerging the key fob into saltwater at the beach. If you suspect that your fob was exposed to water, place it in a rice bag to draw out the moisture. If this fails, you'll require your fob to be changed by an auto locksmith or dealer. Water Damage Damage to the water supply can occur if you immerse the fob in the ocean or wash it in a washing machine. Saltwater can cause the circuit board to short, and eventually fail. In the event that you let your fob get wet, it's not an ideal idea but if you drop it in a glass of water or forget to take it out of your pocket before you run the washer do not give up hope. First, remove the battery from the fob. Clean the electronic chip with isopropyl or a similar product and dry it completely before replacing the battery. Check the fob to verify if it's functioning. If the key still doesn't work, it might need to be reset. This is usually handled by a dealer or professional auto locksmith. If the key you have is older and has not been programmed for your vehicle You will need to replace it completely. This is a simple procedure that can be handled by a professional automotive locksmith. The locksmith will need the key to be cut to match your car's ignition. The locksmith will also need to program your fob into the car's system. This is a cheap and quick process that could be completed within the same day. Receiver Module Issues One of the most common reasons your 500 key fob may stop functioning is because it's out of range. The remote usually has 30 feet of range or less and if it's far away from your car it will not respond to your commands. This can be fixed by moving closer to your vehicle until it begins responding. If you've replaced the battery on your coin (commonly called”button” or “button” or “watch”) and your fob still won't work It could be because of an internal circuit board problem. In most cases, reprogramming the fob can resolve the issue. You can find the instructions on how to do this for all automobiles by searching YouTube or looking through the owner's manual. It is sometimes necessary to replace the clips made of metal that hold the coin batteries in place. If they loose tension it can prevent the battery from sitting properly and can cause the remote to malfunction. In rare cases the fob could be desync'd with your vehicle due to software problems or hardware issues. You can fix this problem by visiting your local auto-locksmith or dealer to reprogram your key fob. In certain instances the software might require reinstallation into your body control modules. Interference In addition to a dead coin battery The key fob might not be receiving or transmitting signals due to interference. This could occur if the key fob is in close proximity to a radio transmitter like a cell phone or radar detector. The key fob could not function because of a problem with the buttons, water damage or damage to the internal chips. If the key fob has been unable to function for a while without notice or after trying everything you can at home to resolve it e.g. replacing the battery, reprogramming it and using the spare key fob, you may have a faulty receiver module on your 500. The receiver module, which is located under the dashboard, is able to pick up radio frequency signals from your key fob. Then, it converts them into electronic commands that the vehicle interprets. Fortunately, there's an easy method to reset all of the onboard systems in your 500 keys, including the key fob. Disconnect the 12 volt battery for about 15 minutes, by disconnecting the negative cable first then the positive cable. Then reconnect the battery. This will clear any residual electricity, and allow you to restart the car's computer. This will help you get your key fob working again. If the issue continues, you should speak with an expert technician. They can identify the root cause of your problem.