The Ultimate Glossary On Terms About Fiat 500 Keys 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. However, the fob could stop working for several reasons.

The most common cause of key fob failure is an inoperable coin battery. Other causes include water damages, a faulty module, and interference signals.

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If your key fob battery is dead, the first step is to replace it. Choose a button battery with the same voltage, size, and specification as your old one.

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

If the key fob doesn't working despite not being exposed to water, it could be due a malfunction in the receiver module or in the internal electronic chip. In these instances it is possible that reprogramming the key fob with an OBDII scanner might assist.

Water Damage

If your key fob's battery has taken 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 get it back to working by removing the battery and scrubbing the circuit board with isopropyl alcohol. It's best to let the fob dry completely before installing a new battery.

If your key fob has stopped working, even after replacing the battery and changing the program, you could have a faulty receiver module. You can find reprogramming instructions for most remote key fobs on YouTube or in your owner's guide. You could also try resetting the car's onboard computer by using the OBDII scan tool.

Faulty Receiver Module

The key fob contains the chip that communicates with the vehicle's system. If the chip is damaged, it will be unable to longer be able to send or receive signals to the vehicle. A key fob falling off can cause this, as can exposure to water. If your key fob has stopped functioning due to water exposure, you may be able to fix it if clean the chip with electronic cleaner or isopropyl ethanol.

If the key fob is still unable to not respond even after cleaning it then it is likely that the component is damaged and will need to be replaced. A malfunctioning receiver module could also cause the remote control key to not function. This is typically caused by electromagnetic interference.

A malfunctioning electronic chip

The electronic chip in your key fob plays a vital role in the anti-theft system of your car. It transmits a message the immobiliser in your car to determine that the key is valid. If the chip is damaged or damaged, your car will not start.

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

Contacts to the battery are not working properly.

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

Modern fobs come with rubber seals that keep out water. A splash of water or a light rain should be fine but submerging them into saltwater could harm the chip's electronic components.

The key fob contains an embedded chip that communicates to the immobilizer system of the vehicle in order to start it. This system utilizes cryptocoding systems in newer vehicles and the older red key system for older ones. This chip will have to be replaced if malfunctioning.

A faulty 12 Volt battery

A damaged battery could cause the key fob to function. When this occurs, the car's computer system will not be able to recognize that the remote is inside the vehicle.

Test the battery using the voltmeter before replacing it to determine its capacity. A fully charged battery should read 12.6 volts. If the reading falls significantly it is time to replace the battery.

To determine the capacity of a battery test the battery's capacity by placing an electrical load on it for a couple of minutes. This will remove 1percent of the surface charges. Then take another measurement of the voltage. The longer a battery can keep its voltage steady more effectively, the greater its capacity. The ideal scenario is to keep it close to 12 volts for several minutes.

Problems with Radio Signal


This is the most frequent cause of a key fob that ceases to send signals to the car. The battery can be replaced to solve this problem. It is however important to purchase a battery that has the same size and voltage as the original one.

Fobs aren't impervious to damage and can take a lot. The battery buttons and contacts are brittle which means they could be bent or broken by excessive use.

Other objects or transmitters using the same frequency can disrupt the signal. A light-control system in your home, for example, may interfere with key fobs using the same frequency. This could affect the remote control in your car.

Faulty OBDII scan tool

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

Professional scan tools enable mechanics to monitor the car's network, and run various self-tests. These tools can save time, but they are costly and are out of reach for the majority of DIYers.

If your OBD2 scanner won't start make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are both present it's likely that a fuse has blown. This is among the most common causes of failures in the scan tool. The easiest solution is to replace the fuse which has blown.