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Fiat Panda Key Fob Replacement

Fiat Panda key fobs contain a transponder chip that sends the signal to your vehicle to open the doors or start the engine. However, the fob may stop working due to a variety of causes.

A dead coin battery is the most common reason for a key fob malfunction. Other causes include water damage a faulty receiver module, and signal interference.

Dead Coin Battery

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

If the key fob was exposed to water (such as saltwater or rain at the beach) it must be cleaned before being used again. A paper towel soaked in alcohol or electronic cleaner will help.

If the key fob is not working even though it is not exposed to water it could be due a malfunction in the receiver module or internal electronic chip. Reprogramming the keyfob using an OBDII scan could help in these cases.

Water Damage

If your key fob took immersed in a pool or puddle or even a trip to the washing machine, you could be suffering some water damage. It is usually possible to get it back to working by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's best to allow the device to completely dry before putting in the battery.

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

Faulty Receiver Module

The key fob has a chip which communicates with the vehicle's system. If the chip is damaged, it cannot longer send and receive signals to the vehicle. This can be caused by dropping the key fob, or through exposure to water. If the key fob is not working after exposure to water it may be possible to repair it by cleaning the chip with isopropyl alcohol or an electronic cleaner.

However, if the key fob still does not respond after cleaning it you can be sure that the module is faulty and will need to be replaced. A damaged receiver can cause the key to cease to function. This is typically caused by electromagnetic interference.

Faulty Electronic Chip

The electronic chip in your key fob is a vital role in the anti-theft system of your car. It transmits a signal to the immobiliser unit of your vehicle to tell it whether the key is valid. Your car won't start in the event that the chip has been damaged.

A defective chip could be caused by interference from other objects, bad weather or transmitters located near your vehicle. In this situation you'll require an entirely new key fob.

Contacts of the battery may be damaged.

The battery contacts on the fob's battery can be damaged through heavy use. If they're bent or broken the fob won't send any signals to the receiver modules inside the car.

Modern fobs have rubber seals that block out water. where to get a fiat key cut of water or light rain is acceptable However, submerging them in saltwater may damage the electronic chip.

The key fob contains a chip which communicates with the immobilizer system of the vehicle to start it. This system makes use of cryptocoding systems in newer vehicles or the red key system used in older ones. If the chip is damaged it must be replaced.

A faulty 12 Volt battery

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

Before you replace the battery, test it using a an voltmeter to gauge its capacity. A fully charged battery should read 12.6 volts. If the reading decreases significantly then it's time to replace it.

To determine the capacity of a battery put an electrical load on it for a few minutes. This will eliminate one percent of the surface charges. Then, you can measure the voltage. The longer the battery can keep its voltage steady greater is its capacity. The ideal is to keep it close to 12 volts during several minutes.

Faulty Radio Signal

This is the most frequent reason for keys not sending signals to vehicles. The issue can be fixed by replacing the battery. However, it is important to buy a new battery that is the same voltage and size as the original one.

Fobs aren't indestructible and can take a lot. The battery contacts and buttons are delicate, so they can get bent or damaged from rough use.

A signal may also be affected by other transmitters or objects that use the same frequency. For instance, a light-control panel in your home could send interference on the same frequency that key fobs use. This could affect the remote control in your car.

Afflicted OBDII scan tool

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

Professional scan tools enable a mechanic observe the car's networks 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 scan tool fails to turn on, test the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If all is fine it could be that a fuse has failed. This is among the most frequent causes of a scan tool failing. The easiest solution is to replace the fuse that has been blown.