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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder that transmits an indication from the fob to the car to open doors or start the motor. However, the fob may stop working for several reasons. The most common reason for key fob failure is the battery of the coin is dead. Other causes are water damage as well as a defective module and interference signals. Dead Coin Battery If your key fob battery has failed, the initial thing to do is replace it. Choose a new button battery that is the same voltage, size and specification as the previous one. If the key fob was exposed to water (such as rain or saltwater at the beach) it must be cleaned before using again. A paper towel soaked with isopropyl alcohol or electronic cleaner will work wonders. If the key fob hasn't been exposed to water but still does not work it could be due to a problem with the receiver module or an internal electronic chip. In these instances you can reprogramme the key fob with an OBDII scanner could help. Water Damage If your key fob's battery has taken a bath in the pool or puddle or even a trip down the washing machine, it could have some water damage. It's usually possible to get it back in working order by removing the batteries and cleaning the circuit board with rubbing alcohol. It is recommended to let the fob completely dry prior to installing a battery. If your key fob isn't working even after replacing the battery and changing the program, you could have a malfunctioning receiver module. You can find the instructions for the reprogramming of most remote keys on YouTube or refer to your owner's manual. You can also try resetting the car's onboard computer using the OBDII scan tool. The Key Lab is an electronic chip that communicates with the vehicle's system. The chip will stop sending and receiving signals to the car when it is damaged. This could be due to dropping the key fob or through exposure to water. If the key fob has stopped functioning after exposure to water, it may be possible to repair it by cleaning the chip with isopropyl alcohol, or electronic cleaner. If the key fob doesn't respond to cleaning, it's possible that the component has issues and needs to be replaced. A defective receiver module could also cause the remote control key to cease functioning. This is typically caused by electromagnetic interference. Faulty electronic chip The chip that is embedded in your key fob is an important component of the anti-theft system in your car. It transmits a message the immobiliser in your car to tell it if the key is valid. If the chip is damaged or broken, your vehicle will not start. A damaged chip could be caused by interference signals from other objects or weather conditions that are bad, or transmitters operating on the same frequency as your car. In this scenario an upgrade to the fob will be needed. Faulty Battery Contacts The battery contacts of the fob's battery can be damaged by heavy usage. If they're damaged or bent, the key fob will not send any signals to the receiver modules in the car. Modern fobs have rubber seals to keep out water. A splash of water or light rain is fine but submerging them into salt water could damage the electronic chip. The key fob contains an electronic chip that communicates with the vehicle's immobilizer to allow it to start it. The system uses the old red keys that were used in older vehicles as well as the crypto coding system in modern vehicles. If the chip is not working properly and needs to be replaced. Faulty 12 Volt Battery A malfunctioning battery could cause the key fob to cease to function. The car's computer may not recognize the remote if this occurs. Before replacing the battery, test it with an voltmeter for determining its capacity. A fully charged battery should display 12.6 volts. If the reading drops significantly it is time to replace the battery. To test the battery's capacity put an electrical load on it for a few minutes. This will take off about 1% of the charge on the surface. Then, measure the voltage again. The longer the battery is able to hold its voltage more effectively, the greater its capacity. Ideally, it will remain at 12 volts or less for several minutes. The radio signal is not working properly. Radio Signal This is the most typical reason behind a key fob that stops sending signals to the car. The battery can be replaced to solve this problem. However, it is crucial to buy a new battery with the same size and voltage as the original. Fobs aren't impervious to damage and can withstand a lot. The battery contacts and buttons are delicate which means they could be bent or broken by rough usage. Other transmitters or objects using the same frequency may also disrupt the signal. For instance, a light-control panel close to your home can transmit interference using the same bandwidth that key fobs utilize. This could interfere with the remote control of your car. Problems with OBDII Scan Tool There are many reasons a scanner tool may not work. Certain are more complicated than others. Professional scan tools allow mechanics to observe the car's networks and run a range of self-tests. These tools can save time, but are expensive and are out of reach for the majority of DIYers. If your OBD2 scan tool won't power on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If these are OK it's possible that a fuse has failed. This is among the most common reasons for failure of the scanner. It is often easy to fix the problem by replacing the blown fuse.