Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder which transmits an indication from the fob to the car to open doors or start the motor. The fob can stop functioning due to a variety reasons. The most common cause of key fob malfunction is a dead coin battery. Other causes include water damages, a faulty module, and interference signals. Dead Coin Battery If your key fob battery has died, the first step is to replace it. Make use of a new button battery that is the same size, voltage and specifications as the old one. If the key fob was exposed to water, for example a splash of rain or salt water at the beach, it will have to be cleaned before it can be used again. The best method is to use a paper towel soaked with isopropyl, or electronic cleaner. If the key fob is not working despite not being exposed water it could be due to a problem in the receiver module, or even in the internal electronic chip. Reprogramming the keyfob with an OBDII scan may aid in these situations. Water Damage If your key fob has taken an immersion in the puddle or pool or even a trip to the washing machine, it could have some water damage. It's possible to fix it by removing the batteries and cleaning the circuit board using rubbing alcohol. It is best to let the circuit board completely dry before installing the battery. If your key fob stopped working even after replacing the battery and changing the program, you could have a problem with the receiver module. You can find information on reprograming the majority of remote keys on YouTube or refer to your owner's manual. You can also reset your computer of your vehicle using the OBDII scanner tool. Faulty Receiver Module The key fob is equipped with the chip that communicates with the car's system. The chip will stop sending and receiving signals to the car if damaged. Dropping the key fob could cause this, as could exposure to water. If your key fob stopped working due to water exposure and you are unable to fix it if you clean the chip with electronic cleaner or isopropyl alcohol. If the key fob does not respond to cleaning, it's possible that the receiver module has an issue and must be replaced. A defective receiver can 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 is a vital role in the anti-theft system of your vehicle. It sends a signal the immobiliser unit inside the vehicle to determine whether the key is legitimate. If the chip is damaged or broken, the car will not start. A faulty chip can also be caused by interference signals from objects such as weather conditions, objects or transmitters operating on the same frequency as your car. In this scenario, you will need a new key fob. Contacts with the battery may be damaged. The battery contacts of a key fob are very delicate and can get damaged through repeated use. If they are bent or broken the fob will not be able to send any signals to the receiver modules in the car. Modern fobs have rubber seals that keep out water. Submerging them in water even if it's only a light drizzle or splash could damage the chip's electronic circuit. The key fob comes with an embedded chip that communicates to the immobilizer system of the vehicle to start it. This system utilizes cryptocoding systems in newer vehicles as well as the traditional red key system for older models. If the chip is damaged and needs to be replaced. A faulty 12 Volt battery A damaged battery could cause the key fob not to function. The car's computer won't recognize the remote if this occurs. Test the battery using the help of a voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading drops significantly, it is time to replace the battery. To test the battery's power test the battery's capacity by placing an electrical load on it for a few minutes. This will take away 1percent of the surface charges. Then, measure the voltage again. The longer the battery is able to keep its voltage steady more effectively, the greater its capacity. Ideally, it should remain at or near 12 volts for several minutes. https://www.thekeylab.co.uk/fiat-car-keys/ is the most common reason behind a key fob that ceases to send signals to the car. The battery is able to be replaced to resolve this issue. However, it is crucial to select a replacement battery that is the same voltage and size as the original one. Fobs are subject to a lot of abuse, but they're also not indestructible. Contacts on batteries and buttons can be damaged by rough handling. A signal may also be interrupted by other objects or transmitters that use the same frequency. For example, a light-control panel near your home may transmit interference using the same bandwidth that key fobs use. This could affect the remote control of your car. Faulty OBDII Scan Tool There are many reasons why scanners may not work. Certain are more complicated than others. Professional scan tools enable mechanics to monitor the car's network and run various self-tests. These are real time savers, however they can be expensive, and out of the budget of many DIYers. If your OBD2 scan tool won't power on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they're both in good shape, it's likely that a fuse is blowing. This is one of the most frequent reasons for failure of the scanner. It is typically easy to fix the issue by replacing the fuse that has blown.