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20 Truths About Fiat 500 Keys: Busted
Fiat Panda Key Fob Replacement

Fiat Panda key fobs contain a transponder chip which sends the signal to your vehicle to open the doors or start the engine. However, the key fob may stop working for several reasons.

A dead coin battery is the most frequent cause of key fob malfunctions. Other causes are water damage, malfunctioning receiver modules, and signal interference.

Dead Coin Battery

If the battery in your key fob is dead, the first step is to replace it. Use a new button cell battery that has the same voltage, size and specification as the previous one.


If the key fob has been 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. The best way to do this is using an old towel soaked in isopropyl or electronic cleaner.

If the key fob has not been exposed to water but isn't working it could be a problem with the receiver module or an internal electronic chip. Reprogramming the keyfob by using an OBDII scan may help in these cases.

Water Damage

If your key fob has taken a bath in the puddle or pool, or taken a trip to the washing machine, it could have some water damage. You can usually get it working again by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It's a good idea to let the fob dry completely before putting in a brand new battery.

There could be a problem with the module when your key fob ceases working after replacing the battery or reprogramming. You can find reprogramming procedures for the majority of vehicles' remote key fobs on YouTube or in the owner's manual. fiat ducato key fob can also try resetting the car's computer onboard using the OBDII scan tool.

Faulty Receiver Module

The key fob's chip is a chip that communicates with the car's system. This chip will stop sending and receiving signals to the car when it is damaged. This could be due to dropping the key fob, or due to exposure to water. If the key fob is not working after water exposure it could be possible to repair it by cleaning the chip with isopropyl alcohol or an electronic cleaner.

However, if the key fob does not respond even after cleaning it it is likely that the receiver module is not functioning properly and will need to be replaced. A damaged receiver can cause the key to stop working. This is often caused by electromagnetic interference.

A malfunctioning electronic chip

The chip that is embedded in your key fob is an important component of the anti-theft system in your car. It sends a signal the immobiliser unit in your vehicle to tell it whether the key is genuine. If the chip is damaged or broken, your car will not start.

A damaged chip could be caused by interference signals from other objects, bad weather conditions or transmitters on the same frequency as your car. In this instance, you will need an entirely new key fob.

Contacts for the battery that are defective

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

Modern fobs have rubber seals to keep out water. A splash of water or light rain is fine, but submerging them in saltwater may damage the chip's electronic components.

The key fob contains an electronic chip that communicates with the vehicle's immobilizer system in order to allow it to start. This system utilizes cryptocoding systems in vehicles that are more modern as well as the traditional red key system in older ones. The chip must be changed if it is malfunctioning.

A faulty 12 Volt battery

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

Before you replace the battery, test it with the voltmeter to determine its capacity. A fully charged battery should display 12.6 volts. If the reading drops dramatically, it's time to replace it.

To determine the capacity of a battery to determine its capacity, put an electric load on it for a couple of minutes. This will eliminate approximately 1% of the surface charge. Then take another measurement of the voltage. The longer a battery can hold its voltage greater is its capacity. Ideal is that it stays close to 12 volts over several minutes.

Radio Signal Faulty Radio Signal

This is the main reason for a keyfob that ceases to send signals to the car. This issue can be resolved by replacing the battery. It is crucial to purchase a battery that has the same voltage and dimensions as the original.

Fobs endure a lot of abuse, and they aren't indestructible. The battery buttons and the contacts are fragile and are susceptible to being bent or damaged from excessive use.

Other transmitters or objects using the same frequency may also interfere with the signal. For example, a light-control panel in your home could send interference over the same frequency that key fobs use. This could cause interference with the remote control in your car.

Faulty OBDII scan tool

There are a variety of reasons why scanner tools may not work. Some are more complicated than others.

Professional scan tools let mechanics to look over the car's network and perform various self-tests. These tools can save time, but are costly and not accessible to most DIYers.

If your OBD2 scan tool won't power on, test 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 blown. This is the main reason for a scan tool to fail. It is generally easy to fix the issue by replacing the blown fuse.