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Fiat Punto Remote Key Replacement Panda keyfobs are equipped with a transponder that sends an electronic signal from the fob to the car to unlock doors or turn on the motor. However, the fob can not function due to a variety of reasons.

A dead coin battery is the most frequent reason for key fob malfunctions. Other causes include water damage or a malfunctioning module and interference signals.

Dead Coin Battery

Replace the battery in case your key fob is dead. Use a new button cell battery that is identical in size, voltage, and specification like the previous one.

If the key fob has been exposed to water, like a splash of rain or salt water on the beach, it will need to be cleaned before it is able to be used again. The best solution is to use an old towel soaked in isopropyl or an electronic cleaner.

If the key fob doesn't working despite being not exposed to water it could be due to a glitch in the receiver module or internal electronic chip. Reprogramming the keyfob using an OBDII scan can help in these cases.

Water Damage

If your key fob has gotten submerged in a pool or puddle or walked down the washing machine, you could be suffering some water damage. You can usually restore it's functionality by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's best to let the fob dry completely before putting in a new battery.

If your key fob stopped working, even after replacing the battery and reprogramming it, you may have a problem with the receiver module. Reprogramming instructions are available for the majority of vehicles' remote key for fiat 500 fobs on YouTube or in the owner's guide. You can also reset your computer of your vehicle using the OBDII scanner tool.

Faulty Receiver Module

The key fob contains a chip which communicates with the vehicle's system. This chip will stop sending and receiving signals to the car if it becomes damaged. The key fob being dropped can cause this, as well as exposure to water. If your key fob has stopped functioning due to water exposure it is possible to fix it if clean the chip with electronic cleaner or isopropyl alcohol.

If the key fob won't respond to cleaning, it is possible that the receiver module has a fault and needs to be replaced. A malfunctioning receiver could cause the key to stop working. This is usually caused by electromagnetic interference.

Faulty Electronic Chip

The electronic chip inside your key fob is a vital role in the anti-theft security system of your vehicle. It sends a signal the immobiliser unit in your vehicle to tell it whether or not the key is legitimate. The car won't start if the chip is damaged.

A malfunctioning chip can be caused by interference from other objects, weather conditions or transmitters near your vehicle. In this situation, you will need an entirely new key fob.

Contacts to the battery are not working properly.

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

Modern fobs are made with rubber seals to keep out water. A splash of water or light rain should be fine However, submerging them in saltwater can cause damage to the electronic chip.

The fiat key fob has an electronic chip that communicates with the vehicle's immobilizer system in order to activate it. This system makes use of cryptocoding systems in the latest vehicles and the older red key system in older ones. The chip must be replaced if it's malfunctioning.

A faulty 12 Volt battery

A malfunctioning battery could cause the fiat key replacement fob not to work. If this happens, the car's computer system will not be able to recognize that the remote is inside the vehicle.

Test the battery with a voltmeter before replacing it to determine its capacity. A fully charged battery should display 12.6 volts. If the reading decreases significantly, it is time to replace the battery.

Place an electrical load for a short period of time on the battery to check its capacity. This will take away 1% of the surface charges. Then, you can measure the voltage. The higher the capacity of the battery is, the longer it will keep its voltage. Ideally, it will remain at or near 12 volts for several minutes.

Problems with Radio Signal

This is the main reason for a keyfob that ceases to send signals to the car. The battery could be replaced to fix this problem. But, it is essential to purchase a battery that has the same size and voltage as the original one.

Fobs endure a lot of abuse, and they aren't indestructible. Contacts and buttons on batteries can be damaged by rough handling.

Other objects or transmitters using the same frequency can also interfere with the signal. A light control panel in your home, for example can interfere with key fobs using the same frequency. This could interfere with the remote control of your car.

Faulty OBDII Scan Tool

There are a variety of reasons why scanners don't perform. Certain are more complicated than others.

Professional scan tools allow a mechanic to examine the car's systems and conduct a variety self-tests. They can be huge time-savers, but they can also be very expensive and are out of the range of most DIYers.

If your OBD2 scanner isn't turning on examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are OK it's possible that a fuse has failed. This is among the most frequent reasons for failure of the scanner. It is usually simple to fix the issue by replacing the fuse that has blown.