20 Irrefutable Myths About Fiat 500 Keys: Busted Fiat Panda Key Fob Replacement

Fiat Panda keyfobs are equipped with a transponder, which sends a signal from the fob to the car to open doors or start the motor. The fob can stop functioning for a variety of reasons.

A dead battery for the coin is the most frequent cause of the malfunction of a key fob. Other causes are water damage, the receiver module is defective, and signal interference.

Dead Coin Battery

If your key fob battery is dead, the first thing to do is replace it. Use a button cell with the same voltage, size and specifications as the old 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 can be used again. The trick is to use an old towel soaked in isopropyl or electronic cleaner.

If the key fob doesn't working despite not being exposed water, it could be due to a problem in the receiver module or in the internal electronic chip. Reprogramming the keyfob with an OBDII scan could aid in these situations.

Water Damage

It is possible to get water damage if your key fob was submerged in a puddle, pool or washing machine. It's possible to fix it by taking out the batteries and cleaning the circuit board with ruby alcohol. It is best to let the circuit board completely dry prior to installing a battery.

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

Faulty Receiver Module

The key fob's chip is a chip that communicates with the vehicle's system. If this chip becomes damaged, it can no longer transmit or receive signals to the vehicle. Dropping the key fob can cause this, as could exposure to water. If the key fob stops working after exposure to water, it could be possible to repair it by cleaning the chip with isopropyl alcohol or an electronic cleaner.

If the key fob won't respond to cleaning, it is possible that the module has a fault and needs to be replaced. A malfunctioning receiver module could also cause the remote control key to not function. This is usually due to electromagnetic interference.

A defective electronic chip

The electronic chip that is in your key fob plays a crucial role in the anti-theft system in your car. It transmits a signal to the immobiliser unit in your car to determine whether or not the key is valid. The car won't start when the chip is damaged.


A malfunctioning chip can be caused by interference caused by objects, bad weather or transmitters near your vehicle. In this case you'll require a new key fob.

Contacts for the battery that are defective

The battery contacts on the key fob could be damaged through heavy use. If they're bent, or damaged, the fob will not send any signals to receiver modules in the vehicle.

Modern fobs are equipped with rubber seals to keep out water. Submerging them in water even if it is just the slightest splash or drizzle could harm the chip's electronic circuit.

The key fob is equipped with an electronic chip that communicates with the immobilizer system of the vehicle to start it. This system utilizes cryptocoding systems in the latest vehicles or the red key system in older ones. The chip must be replaced if it's faulty.

The 12 Volt Battery is faulty

A defective battery can cause the remote to cease to function. The car's computer may not recognize the remote when this happens.

Test the battery with an voltmeter prior to replacing it to determine its capacity. A fully charged battery should display 12.6 volts. If the reading falls significantly it is time to replace the battery.

Set an electrical load for a few seconds on the battery to test its capacity. This will take off approximately 1 percent of the charge on the surface. Then, you can measure the voltage once more. The longer the battery is able to hold its voltage more effectively, the greater its capacity. Ideal is to hold close to 12 volts during several minutes.

The radio signal is not working properly. Radio Signal

This is the most typical reason behind a key fob that stops sending signals to the car. This issue can be fixed by replacing the battery. It is important to buy batteries that have the same dimensions and voltage as the original.

Fobs endure a lot of abuse, but they're not impervious to destruction. The battery buttons and the contacts are fragile, so they can get bent or broken by rough use.

Other objects or transmitters using the same frequency may also interfere with the signal. For example, a light-control panel close to your home can transmit interference using the same bandwidth that key fobs use. This could cause interference with your car's remote control.

The tool is not working properly. OBDII scan tool

There are a variety of reasons why scanners may not function. Certain are more complicated than others.

Professional scan tools let a mechanic observe the car's network, and run various self-tests. These tools can save a lot of time, but are costly and out of reach for most DIYers.

If your OBD2 scanner won't turn on make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If they are all OK there is a chance that a fuse has blown. This is the most frequent cause of scan tool failure. TheKeyLab is usually to replace the fuse that has been blown.