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fiat punto replacement key Panda Key Fob replacement key for fiat ducato van

Fiat Panda key fobs contain transponder chips that send the signal to your vehicle to open the doors or start the engine. However, the fob can stop working for several reasons.

The most commonly cited reason for key fob failure is the battery of the coin is dead. Other causes are water damage, a faulty module, and interference signals.

Dead Coin Battery

Replace the battery in case your key fob has died. Use a button cell battery that has the same voltage, size and specifications as your previous one.

If the key fob was exposed to water (such as rain or saltwater at the beach) it should be cleaned prior to being used again. The best way to do this is using a paper towel soaked with isopropyl or an electronic cleaner.

If the key fob isn't working even though it is not exposed to water, it could be due to a problem in the receiver module or in the internal electronic chip. In these situations you can reprogramme the key fob using an OBDII scanner could help.

Water Damage

You could have water damage to your key fob if it was submerged in a pool, puddle or washing machine. It's usually possible to get it working again by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It is best to let the circuit board completely dry before putting in batteries.

If your key fob has stopped working, even after replacing the battery and programming it again, you might have a defective receiver module. You can find the instructions for the reprogramming of most remote keys on YouTube, or consult the owner's manual. You can also reset the computer in your car with the OBDII scanner tool.

Faulty Receiver Module

The key fob has 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. This can be caused by dropping the key fob or by water exposure. If the key fob stops functioning after exposure to water, it is possible to repair the issue by cleaning or cleaning the chip with isopropyl alcohol or an electronic cleaner.

If the key fob won't respond to cleaning, it's possible that the component has an issue and must be replaced. A damaged receiver module may also cause the remote control key to stop functioning. This is usually due to electromagnetic interference.

Electronic chip that is malfunctioning

The chip inside your key fob is a vital role in the anti-theft system of your vehicle. It transmits a signal to the immobiliser device in your vehicle to tell it whether the key is in fact valid. The car will not start if the chip is damaged.

A defective chip could be caused by interference from other objects, bad weather or transmitters close to your vehicle. In this situation you'll need a new key fob.

Contacts for the battery that are defective

The battery contacts of the key fob could be damaged by excessive usage. If they're bent or broken, the fob won't send any signals to receiver modules in the vehicle.

Modern fobs are designed with rubber seals in order to keep out water. A splash of water or a light rain is fine but submerging them into saltwater may damage the electronic chip.

The key fob contains an electronic chip that communicates with the immobilizer system of the vehicle to begin it. The system utilizes the red keys of older vehicles, or the cryptocoding system found in modern vehicles. If the chip is damaged and needs to be replaced.

Problematic 12 Volt Battery

A defective battery can cause the key fob to cease to function. When this happens, the car's computer system cannot recognize that the remote is in the vehicle.

Before replacing the battery, test it by using a the voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading drops significantly it's time to change it.

To test the battery's capacity put an electrical load on it for a couple of minutes. This will take away approximately 1% of the charge on the surface. Then, test the voltage once more. The higher the capacity of the battery, the longer it can maintain its voltage. It should be at or near 12 volts for several minutes.

Problems with Radio Signal

This is the most common reason for the key fob not sending signals to vehicles. This problem can be solved by replacing the battery. However, it is important to choose a battery with the same voltage and size as the original one.

Fobs take a lot of abuse, but they're not impervious to destruction. Contacts on batteries and buttons can be damaged through rough handling.

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

Incorrect OBDII Scan Tool

There are many reasons why a scanner tool may not function. Some are more complicated than others.

Professional scan tools allow mechanics to observe the spare car key fiat 500's networks and run a variety of self-tests. These are real time-savers, but they can be expensive, and out of the range of most DIYers.

If your OBD2 scan tool fails to turn on, make sure you check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If all is fine it could be that a fuse has been blown. This is the most typical reason for a scan tool to fail. It is generally simple to fix the issue by replacing the fuse that was blown.