Fiat Panda Key Fob Replacement Fiat Panda key fobs contain an transponder chip that transmits the signal to your vehicle to open the doors and start the engine The fob might stop working due to a variety of reasons The most commonly cited reason for key fob failure is an inoperable coin battery Other causes include water damage or a damaged module and interference signals Dead Coin Battery If your key fob's battery has gone out of service, the first step is to replace it Choose a button battery with the same voltage, size and specifications as your previous one If the key fob has been exposed to water, for example a splash of rain or salt water at the beach, it will need to be cleaned before it is able to be used again A paper towel that has been soaked in isopropyl alcohol or electronic cleaner can do the trick If the key fob has not been exposed to water but it is still not working it could be an issue with the receiver module or an internal electronic chip Reprogramming the keyfob using an OBDII scan can help in these cases Water Damage If your key fob has gotten immersed in a pool or puddle or gone down the wash machine, you may have some water damage It's possible to get it working by getting rid of the batteries and cleaning the circuit board using ruby alcohol It is a good idea to let the fob dry completely before installing a new battery You may have a faulty module if your key fob stops working after replacing the battery or replacing it with You can find reprogramming instructions for most vehicles' remote key fobs on YouTube or in your owner's guide You could also try resetting the car's onboard computer using the OBDII scan tool Faulty Receiver Module The key fob has a chip that connects to the vehicle's system This chip will stop sending and receiving signals to the car if damaged This can be caused by dropping the key fob or by water exposure If the key fob stopped functioning after exposure to water, it is possible to fix it by cleaning the chip using isopropyl ethanol or electronic cleaner If the key fob doesn't respond to cleaning, it's likely that the module is in a fault and needs to be replaced A malfunctioning receiver module could also cause the remote control key to stop working This is usually due to electromagnetic interference Faulty Electronic Chip The electronic chip in the key fob is a crucial component of the anti-theft systems in your vehicle It sends a message to the immobiliser in your car to inform it whether the key is genuine If the chip is damaged or broken, your vehicle won't start A faulty chip can also be caused by interference signals from objects, bad weather conditions or transmitters operating on the same frequency as your vehicle In this instance, you will need a new key fob Contacts for the battery that are damaged The battery contacts on the key fob are delicate and may be damaged by repeated use If they're bent or damaged, the fob will not send any signals to the receiver modules in the vehicle Modern fobs feature rubber seals that block out water In the event of submerging them in water, even if it's only an occasional drizzle or splash, can damage the electronic chip The key fob has chips that communicate with the vehicle's immobilizer system to allow it to start The system uses the old red keys that were used in older vehicles or the crypto coding system in newer vehicles This chip will need to be replaced if malfunctioning Faulty 12 Volt Batterie A damaged battery can cause the remote to stop working The car's system will not recognize the remote when this happens Test the battery using the help of a voltmeter to determine its capacity A fully charged battery should display 126 volts If the reading falls dramatically it is time to replace the battery Place an electrical load for a few seconds on the battery to test its capacity This will eliminate 1percent of the surface charges Then, test the voltage once more The higher the capacity of the battery and the longer it can keep its voltage Ideal is that it stays close to 12 volts for several minutes Problems with Radio Signal This is the most frequent reason for the key fob to stop sending signals to cars The battery is able to be replaced to resolve this issue However, it is important to purchase a battery that has the same voltage and size as the original one Fobs aren't impervious to damage and are susceptible to damage Contacts on batteries and buttons can be damaged by rough handling A signal can also be impacted by other objects or transmitters that operate on the same frequency A light-control panel in your home, for instance can interfere with key fobs that have the same bandwidth This can interfere with your car's remote control Problems with OBDII Scan Tool There are many reasons why scanners don't function Some are more complicated than others Professional scan tools let a mechanic observe the car's network and run various self-tests http//historydbdate/indexphptitle=hvasshawkins9289 are real time savers, but they can be expensive, out of the budget of most DIYers If your OBD2 scanner doesn't work examine the voltage at terminal 16 scan tool power and terminal 4 chassis ground If these are both present it's possible that a fuse has been blown This is among the most frequent causes of failures in the scan tool It is generally easy to fix the issue by replacing the blown fuse