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Why We Our Love For Fiat 500 Keys (And You Should Also!)
Fiat Panda Key Fob Replacement

Fiat Panda keyfobs are equipped with a transponder, which sends an electronic signal from the fob to the car to unlock doors or turn on the motor. The fob may stop working for a variety of reasons.

The most common cause of key fob malfunction is the battery of the coin is dead. Other causes are water damage, malfunctioning receiver modules and signal interference.

Dead Coin Battery

If your key fob's battery has failed, the initial step is to replace it. Make use of a new button battery with the same voltage, size, and specification as the original.

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 can do the trick.

If the key fob is not working despite being not exposed to water, it could be due to a problem in the receiver module or internal electronic chip. In these cases, reprogramming the key fob with an OBDII scanner could help.

Water Damage

There could be water damage if your key fob was submerged in a puddle, pool or washing machine. It's possible to repair it by taking the batteries off and cleaning the circuit board with rubbing alcohol. It is a good idea to allow the fob to dry completely before putting in a new battery.

If your key fob stopped working even after replacing the battery and programming it again, you might have a faulty receiver module. You can find information on changing the programming of most remote keys on YouTube or in the owner's manual. You can also reset the computer of your vehicle using the OBDII scanner tool.

Faulty Receiver Module

The key fob is equipped with a chip that communicates with the vehicle's system. If the chip is damaged, it will be unable to longer transmit 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 stops working after water exposure it may be possible to fix it by cleaning the chip using isopropyl alcohol or electronic cleaner.

If the key fob continues to not respond after cleaning it, there is a good chance that the receiver module is not functioning properly and needs to be replaced. A faulty receiver module can also cause the remote control key to stop working. This is usually caused by electromagnetic interference.

Faulty electronic chip

The electronic chip inside your key fob is a vital part in the anti-theft security system of your vehicle. It sends a message to the immobiliser inside your car to tell it if the key is valid. The car will not start if the chip is damaged.

A malfunctioning chip could be caused by interference signals from objects or weather conditions that are bad, or transmitters on the same frequency near your car. In this scenario, a new fob will be needed.

Contacts for the battery that are defective

The battery contacts of the key fob are delicate and could be damaged when used for long periods of time. If they're bent, or broken, the fob won't send any signals to receiver modules inside the vehicle.

Modern fobs come with rubber seals to keep out water. In the event of submerging them in water, even if just a light drizzle or splash could harm the chip's electronic circuit.

The key fob has chip that communicates with the immobilizer system of the vehicle, allowing it to start it. The system relies on cryptocoding systems in modern vehicles or the red key system for older models. If the chip is not working properly it will have to be replaced.

Problems with 12 Volt Batteries

A malfunctioning battery could cause the key fob to cease working. When this occurs the car's computer won't recognize that the remote is in the vehicle.

Before replacing the battery, you should test it with a an voltmeter to gauge its capacity. A fully charged battery will display 12.6 volts. If the reading decreases significantly it's time to change it.

Place an electrical load for a short period of time on the battery to determine its capacity. This will eliminate 1percent of the surface charges. Then, you can measure the voltage again. The longer a battery is able to keep its voltage steady more effectively, the greater its capacity. Ideal is that it stays at or near 12 volts for several minutes.

Radio Signal Faulty Radio Signal

This is the most typical reason for the key fob to stop sending signals to cars. The issue can be fixed by replacing the battery. It is crucial to purchase a battery that has the same voltage and dimensions as the original.

Fobs are subject to a lot of punishment, and aren't indestructible. The battery buttons and contacts are brittle, so they can get bent or broken with rough use.

The signal could also be affected by other objects or transmitters that operate on the same frequency. A light-control panel at your home, for example, may interfere with key fobs that use the same frequency. This can interfere with the remote control of your car.

Incorrect OBDII Scan Tool

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


Professional scan tools allow a mechanic to look over the car's networks and perform a variety of self-tests. These can be real time-savers, but they can also be very expensive, and beyond the reach of most DIYers.

If fiat car keys OBD2 scan tool doesn't 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 failed. This is among the most common reasons for failure of the scanner. The most straightforward fix is to replace the blown fuse.