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fiat 500 keyfob Panda key fobs contain an transponder chip that transmits signals to your car to open the doors or start the engine. However, the fob may be inoperable due to various reasons.

The most common cause of key fob malfunction is an inoperable coin battery. Other causes include water damage, the receiver module is defective and signal interference.

Dead Coin Battery

If your fiat abarth key fob battery is dead, the first thing to do is replace it. Make use of a button cell battery with the same voltage, size and specifications as the previous one.

If the key fob was exposed to water (such as saltwater or rain at the beach), it must be cleaned before using again. The trick is to use a paper towel soaked with isopropyl or an electronic cleaner.

If the key fob isn't working despite not being exposed water it could be due a malfunction in the receiver module, or even in the internal electronic chip. In these instances you can reprogramme the key fob with an OBDII scanner may assist.

Water Damage

If your key fob has taken immersed in a puddle or pool or gone through the washing machine, you might have some water damage. It's possible to get it working by getting rid of the batteries and cleaning the circuit board with ruby alcohol. It's a good idea let the fob dry completely before installing a new battery.

If your key fob has stopped working even after replacing the battery and reconfiguring it, you may have a problem with the receiver module. You can find information on the reprogramming of most remote keys on YouTube or refer to 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 is equipped with the chip that communicates the vehicle's system. The chip will stop sending and receiving signals to the car when it is damaged. This could be due to dropping the key fob or by exposure to water. If the key fob stopped working after exposure to water, it could be possible to repair the issue by cleaning or cleaning the chip with isopropyl ethanol or electronic cleaner.

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

Faulty Electronic Chip

The electronic chip in your key fob is an essential part of the anti-theft system in your car. It sends out a signal the immobiliser unit inside your car to inform it whether or not the key is legitimate. The car won't start in the event that the chip is damaged.

A damaged chip could be caused by interference from other objects, weather conditions or transmitters located near your vehicle. In this situation, a new fob will be required.

Faulty battery contacts

The battery contacts on the key fob are delicate and may be damaged through repeated use. If they're bent or damaged, the fob will not send any signals to the receiver modules in the vehicle.

Modern fobs are equipped with rubber seals that block out water. A splash of water or light rain is fine however, submerging them in saltwater can harm the chip's electronic components.

The key fob has an electronic chip that communicates with the vehicle's immobilizer in order to allow it to start. The system relies on cryptocoding systems in newer vehicles and the older red key system for older ones. If the chip is not working properly and needs to be replaced.

Faulty 12 Volt Batterie

A faulty battery can cause the key fob to stop working. When this occurs the car's computer will not recognize that the remote is within the vehicle.

Test the battery using a voltmeter before replacing it to determine its capacity. A fully charged battery should display 12.6 volts. If the reading drops significantly then it's time to replace the battery.

Install an electrical charge for a short time on the battery to check its capacity. This will take away about 1% of the surface charge. Then, you can measure the voltage again. The longer the battery can hold its voltage and the higher its capacity. Ideally, it will remain at 12 volts or less for several minutes.

Radio Signal Faulty Radio Signal

This is the most common reason for a fiat punto evo key fob that ceases to send signals to the car. This issue can be fixed by replacing the battery. It is crucial to purchase a battery with the same dimensions and voltage as the original.

Fobs can take a lot 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.

A signal can also be disrupted by other objects or transmitters which use the same frequency. For instance, a lighting control panel near your home may send interference on the same frequency that key fobs utilize. This could interfere with the remote control of your car.

Afflicted OBDII scan tool

There are many reasons why a scan tool may not work. Some are more complicated than others.

Professional scan tools allow mechanics to look over the car's networks and perform a variety of self-tests. These tools can save you a lot of time, but are costly and not accessible to the majority of DIYers.

If your OBD2 scanner isn't turning on Check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If they're both in good shape it's possible that a fuse has failed. This is among the most frequent reasons for failure of the scanner. It is typically simple to fix the issue by replacing the blown fuse.