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Fiat Panda key fobs contain a transponder chip that sends an alert to your car to open the doors or start the engine. The fob could stop working for a variety.

A dead battery for the coin is the most common cause of malfunctioning keys. Other causes are water damage, a faulty receiver module and signal interference.

Dead Coin Battery

Replace the battery if the key fob has died. Use a new button cell battery with the same size, voltage, and specification like the previous one.

If the key fob was exposed to water, like a splash of rain or salt water at the beach, it will have to be cleaned before it is able to be used again. A paper towel soaked with isopropyl alcohol or electronic cleaner can be the solution.

If the key fob hasn't been exposed to water, but it is still not working, there may be an issue with the receiver module or an internal electronic chip. In these instances you can reprogramme the key fob with an OBDII scanner may assist.

Water Damage

If your key fob took immersed in a puddle or pool, or taken a trip down the washing machine, you may have some water damage. It's usually possible to repair it by taking out the batteries and cleaning the circuit board with rubbing alcohol. It is best to allow the device to completely dry before putting in a battery.

You may have a faulty module if your key fob stops working after replacing the battery or reprogramming. There are reprogramming guidelines for all vehicles' remote key fobs on YouTube or in the owner's manual. You could also try resetting the car's onboard computer by using the OBDII scan tool.

Faulty Receiver Module

The key fob is equipped with an electronic chip that communicates with the vehicle's system. If this chip becomes damaged, it cannot longer transmit or receive signals to the vehicle. This could be due to dropping the key fob or through exposure to water. If the key fob has stopped working after exposure to water, it could be possible to repair the issue by cleaning or cleaning the chip using isopropyl alcohol or an electronic cleaner.

If the key fob won't respond to cleaning, it's possible that the component has a fault and needs to be replaced. A malfunctioning receiver module could also cause the remote control key to stop working. This is often caused by electromagnetic interference.

A defective electronic chip

The electronic chip inside the key fob is an essential part of the anti-theft system in your car. It transmits a message the immobiliser inside your car to inform it whether the key is genuine. The car won't start in the event that the chip has been damaged.

A malfunctioning chip can be caused by interference from other objects, weather conditions or transmitters located near your vehicle. In this situation, 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 by repeated use. If they're damaged or bent, the key fob will not be able to send any signals to the receiver modules in the car.

Modern fobs come with rubber seals in order to keep out water. Submerging them in water even if it's just an occasional drizzle or splash, can damage the chip's electronic components.

The key fob has an electronic chip that communicates with the vehicle's immobilizer system in order to allow it to start. This system uses crypto coding systems in newer vehicles as well as the traditional red key system for older models. This chip needs to be replaced if defective.

Faulty 12 Volt Battery

A defective battery can cause the remote to cease working. When this occurs the car's computer will not recognize that the remote is within the vehicle.

Test the battery with the help of a voltmeter to determine its capacity. A fully charged battery will display 12.6 volts. If the reading falls significantly it is time to replace the battery.

To determine the capacity of a battery put an electrical load on it for a couple of minutes. This will take away approximately 1% of the charge on the surface. After that, take the voltage again. The higher the capacity of the battery is, the longer it will keep its voltage. Ideal is that it stays close to 12 volts for several minutes.

The radio signal is not working properly. Radio Signal

This is the main reason for a key fob that stops sending signals to the car. The battery can be replaced to solve this issue. However, it is important to buy a new battery that has the same voltage and size as the original.

Fobs can take a lot abuse, and they aren't indestructible. The battery buttons and contacts are brittle and are susceptible to being bent or broken with rough use.

Other transmitters or objects using the same frequency can disrupt a signal. For instance, a light-control panel that is near your home could transmit interference using the same frequency that key fobs utilize. This could interfere with the remote control of your car.

Faulty OBDII scan tool

There are a number of reasons why a scan tool could not function. Some are more complicated than others.

Professional scan tools let mechanics to observe the car's networks and run various self-tests. These tools can help save time, but they are costly and are out of reach for most DIYers.

If your OBD2 scan tool won't power on, check voltage at the terminals 16 (scantool power) and 4 (chassis earth). If they are all OK, a fuse may have ruptured. This is the most typical reason for failures of the scanner. It is typically simple to fix the issue by replacing the fuse that was blown.