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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain transponder chips that send signals to your car to unlock the doors or start the engine. The fob could stop working due to a variety reasons. A dead coin battery is the most common cause of malfunctioning keys. Other reasons include water damage, a faulty receiver module, and signal interference. Dead Coin Battery If your key fob's battery has gone out of service, the first thing to do is replace it. Make use of a new button battery that is the same voltage, size, and specification like the previous one. If the key fob was exposed to water, such as a splash of rain or salt water on the beach, it will have to be cleaned before it can be used again. The best way to do this is using the paper towel and soak it in isopropyl or an electronic cleaner. If the key fob hasn't been exposed to water, but remains inoperable it could be due to a problem with the receiver module or an internal electronic chip. In these instances, reprogramming the key fob with an OBDII scanner might assist. Water Damage If your key fob has taken a bath in the pool or puddle, or taken a trip through the washing machine, you may have some water damage. It's generally possible to get it working by getting rid of the batteries and cleaning the circuit board using ruby alcohol. It's a good idea to allow the fob to dry completely prior to installing a new battery. If your key fob has stopped working, even after replacing the battery and reprogramming it, you may have a problem with the receiver module. There are reprogramming guidelines for most remote key fobs on YouTube or in the owner's guide. You can also reset your computer of your car using the OBDII scanner tool. thekeylab.co.uk is equipped with a chip which communicates with the vehicle's system. If this chip becomes damaged, it will no longer transmit and receive signals to the vehicle. This can be caused by dropping the key fob, or through exposure to water. If the key fob you have purchased has stopped functioning due to exposure to water or water exposure, you might be able fix the issue if you clean the chip with electronic cleaner or isopropylethanol. However, if the key fob continues to not respond following cleaning, then it is likely that the module is faulty and must be replaced. A faulty receiver can also cause the key to not work. This is often caused by electromagnetic interference. Faulty Electronic Chip The electronic chip that is in your key fob plays a vital part in the anti-theft security system of your car. It transmits a message the immobiliser in your car to tell it that the key is valid. If the chip is damaged or broken, the car will not start. A defective chip could be caused by interference caused by objects, bad weather or transmitters close to your vehicle. In this situation you'll require a new key fob. Contacts for the battery that are defective The battery contacts in the key fob are delicate and can get damaged by repeated use. If they're bent, or damaged, the fob will not transmit any signals to receiver modules inside the vehicle. Modern fobs come with rubber seals that keep out water. A splash of water or light rain is fine but submerging them into saltwater could damage the electronic chip. The key fob has the chip that connects to the vehicle's immobilizer in order to begin it. This system utilizes cryptocoding systems in the latest vehicles and the older red key system used in older models. If the chip is not working properly it must be replaced. Problematic 12 Volt Battery A faulty battery may cause the key fob not to function. When this occurs the car's computer will not be able to recognize that the remote is inside the vehicle. Before replacing the battery, test it using a the voltmeter to determine its capacity. A fully charged battery should display 12.6 volts. If the reading falls significantly it's time to change it. Put an electrical load for a few moments on the battery to check its capacity. This will remove one percent of the surface charges. Then, measure the voltage once more. The higher the capacity of the battery, the longer it can maintain its voltage. Ideally, it will remain close to 12 volts several minutes. The radio signal is not working properly. Radio Signal This is the most common reason for a keyfob that stops sending signals to the car. This problem can be solved by replacing the battery. However, it is important to select a replacement battery that has the same voltage and size as the original one. Fobs can take a lot abuse, but they're not impervious to destruction. The battery contacts and buttons are delicate, so they can get bent or damaged by excessive use. Other transmitters or objects using the same frequency can also interfere with the signal. For instance, a lighting control panel near your home may transmit interference on the same frequency as key fobs utilize. This could affect the remote control of your car. Incorrect OBDII scan tool There are a number of reasons why a scanner might not work. Some are more complex than others. Professional scan tools enable a mechanic observe the car's network, and run various self-tests. These tools can help save time, but they're expensive and are out of reach for the majority of DIYers. If your OBD2 scan tool isn't turning on, test the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If these are OK it's likely that a fuse has blown. This is the most common cause of scan tool failure. It is typically easy to fix the issue by replacing the blown fuse.