Fiat 500 Keys: A Simple Definition Fiat Panda Key Fob Replacement

Fiat Panda keyfobs are equipped with a transponder that sends an indication from the fob to the car in order to unlock doors or start the motor. The fob can stop functioning for a variety.

The most common cause of key fob malfunction is a dead coin battery. Other causes are water damage, a faulty module, and interference signals.

Dead Coin Battery

If the battery in your key fob has gone out of service, the first step is to replace it. Choose a new button battery with the same size, voltage, and specification as the previous one.

If the key fob was exposed to water (such as saltwater or rain at the beach) It must be cleaned prior to using it again. A paper towel soaked in isopropyl alcohol or electronic cleaner can do the trick.

If the key fob is not working even though it is not exposed to water it could be due to a problem in the receiver module or an internal electronic chip. In these situations it is possible that reprogramming the key fob with an OBDII scanner can assist.

Water Damage

You could have water damage if your key fob was submerged in a pool, puddle or washing machine. You can usually restore it's functionality by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's a good idea let the fob dry completely before putting in a brand new battery.

You could have a damaged module in the event that your remote stops working after replacing the battery or changing the programming. You can find the instructions for the reprogramming of most remote keys on YouTube or consult your 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 has an electronic chip that communicates with the car's system. If this chip becomes damaged, it cannot longer be able to send or receive signals to the vehicle. This can be caused by dropping the key fob or through exposure to water. If your key fob stopped functioning due to water exposure or water exposure, you might be able to fix it by attempting to clean the chip using electronic cleaner or isopropylethanol.

However, if the key fob still does not respond after cleaning it, then it is likely that the module is faulty and will require to be replaced. A malfunctioning receiver module could also cause the remote control key to stop working. This is usually due to electromagnetic interference.

Electronic chip that is malfunctioning

The chip inside your key fob plays a vital function in the anti-theft security system of your vehicle. It transmits a message the immobiliser in your car to inform it whether the key is legitimate. Your car will not start in the event that the chip is damaged.

A faulty chip can also be caused by interference signals from objects such as weather conditions, objects or transmitters on the same frequency close to your car. In this case the replacement fob will be required.

Contacts for the battery that are damaged

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

Modern fobs are equipped with rubber seals to keep out water. A splash of water or a light rain is fine However, submerging them in saltwater may harm the chip's electronic components.

The key fob contains chips that communicate with the vehicle's immobilizer system to start it. It uses the red keys of older vehicles or the cryptocoding system found in modern vehicles. This chip needs to be replaced if it's malfunctioning.

Faulty 12 Volt Batterie


A damaged battery can cause the key fob to cease to function. The car's system will not recognize the remote if this happens.

Before you replace the battery, test it using a an voltmeter for determining its capacity. A fully charged battery will display 12.6 volts. If the reading drops significantly, it is time to replace the battery.

To test a battery's capacity put an electrical load on it for a couple of minutes. This will remove about 1% of the surface charge. Then, measure the voltage once more. The longer a battery can keep its voltage steady more effectively, the greater its capacity. The ideal is to keep it close to 12 volts during several minutes.

Faulty Radio Signal

This is the most common reason for the key fob to stop sending signals to a car. The battery could be replaced to fix this problem. But, it is essential to purchase a battery that has the same size and voltage as the original one.

Fobs endure a lot of abuse, and they aren't indestructible. Contacts and buttons on batteries can be damaged through rough handling.

A signal may also be interrupted by other objects or transmitters that operate on the same frequency. A light-control panel in your home, for instance, may interfere with key fobs using the same frequency. thekeylab.co.uk could affect the remote control of your car.

Afflicted OBDII scan tool

There are many reasons why scanner tools may not work. Some are more complex than others.

Professional scan tools enable mechanics to look over the car's network and run various self-tests. These tools can save a lot of time, but they are costly and not accessible to most DIYers.

If your OBD2 scan tool fails to turn on, make sure you check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If they are all OK there is a chance that a fuse has been blown. This is the most frequent cause of scan tool failure. It is usually easy to fix the issue by replacing the fuse that has blown.