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fiat spare key Panda key fobs contain a transponder chip that sends signals to your car to unlock the doors or start the engine. The fob might stop working due to a variety reasons.

A dead coin battery is the most common reason for the malfunction of a key fob. Other causes are water damage or a malfunctioning module and interference signals.

Dead Coin Battery

Replace the battery in case your key fob has gone out of service. Use a button cell battery that has the same voltage, size and specification as your old one.

If the key fob has been exposed to water, like a splash of rain or salt water at the beach, it's going to need 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 isn't working despite being not exposed to water it could be due to a problem in the receiver module, or even in the internal electronic chip. Reprogramming the keyfob using an OBDII scan may aid in these situations.

Water Damage

If your key fob has gotten an immersion in the pool or puddle or gone through the washing machine, you could be suffering some water damage. It is usually possible to be able to get it back up and running by taking the battery off and cleaning the circuit board with isopropyl alcohol. It is a good idea to let the fob dry completely before installing a new battery.

If your key fob isn't working, even after replacing the battery and programming it again, you might have a malfunctioning receiver module. You can find instructions for changing the programming of most remote keys on YouTube or in your owner's manual. You can also reset your computer of your vehicle using the OBDII scanner tool.

Faulty Receiver Module

The key fob has a chip which communicates with the vehicle's system. If the chip is damaged, it will no longer be able to send or receive signals to the vehicle. This could be due to dropping the key fob, or due to exposure to water. If the key fob you have purchased has stopped functioning due to water exposure or water exposure, you might be able to fix it if clean the chip with electronic cleaner or isopropyl alcohol.

If the key fob does not respond to cleaning, it is likely that the module is in a fault and needs to be replaced. A malfunctioning receiver could cause the key to stop working. This usually happens due to electromagnetic interference.

Faulty electronic chip

The electronic chip in the key fob is an essential part of the anti-theft system in your car. It sends a signal the immobiliser unit inside the vehicle to determine whether the key is in fact valid. The car won't start in the event that the chip is damaged.

A defective chip can be caused by interference signals from other objects or weather conditions that are bad, or transmitters operating on the same frequency near your car. In this case it is likely that a new fob would be needed.

Contacts for the battery that are defective

The battery contacts inside a key fob are very fragile and are susceptible to damage when used for long periods of time. If they're damaged or bent, the key fob will not transmit any signals to the receiver modules in the car.

Modern fobs are designed with rubber seals that keep out water. Immersing them in water, even if it's only an occasional drizzle or splash, can damage the electronic chip.

The key fob is equipped with an electronic chip that communicates with the immobilizer system of the vehicle, allowing it to start it. The system utilizes the red keys of older vehicles or the cryptocoding system used in modern vehicles. If this chip is faulty it must be replaced.

Faulty 12 Volt Battery

A faulty battery can cause the key fob to cease working. When this happens, the car's computer system won't recognize that the remote is within the vehicle.

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 dramatically it's time to change it.

To test the battery's capacity test the battery's capacity by placing an electrical load on it for a few minutes. This will remove one percent of the surface charges. Then measure the voltage again. The longer a battery can keep its voltage steady and the higher its capacity. Ideal is that it stays close to 12 volts over several minutes.

The radio signal is not working properly. Radio Signal

This is the most typical cause of a key fob that ceases to send signals to the car. The battery can be replaced to fix this issue. However, it is crucial to purchase a battery with the same voltage and size as the original one.

Fobs aren't indestructible and can withstand a lot. Contacts on batteries and buttons can be damaged by rough handling.

Other transmitters or objects operating on the same frequency can also interfere with the signal. For example, a light-control panel that is near your home could transmit interference using the same bandwidth that key fobs use. This can interfere with the remote control of your car.

Afflicted OBDII Scan Tool

There are many reasons why a scanner tool may not work. Certain are more complicated than others.

Professional scan tools let a mechanic observe the car's network and run various self-tests. They can be huge time savers, but they are also extremely expensive and are out of the budget of many DIYers.

If your OBD2 scan tool fails to turn on, check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If all is fine it could be that a fuse has blown. This is among the most frequent causes of failures in the scan tool. It is usually easy to fix the issue by replacing the fuse that was blown.