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fiat key fob not working Panda keyfobs are equipped with a transponder which transmits a signal from the fob to the car that allows it to unlock doors or turn on the motor. The fob could stop working for a variety of reasons.

A dead coin battery is the most common cause of the malfunction of a key fob. Other causes include water damage malfunctioning receiver modules and signal interference.

Dead Coin Battery

Replace the battery if the key fob has died. Choose a button battery with the same voltage, size and specifications as the old one.

If the key fob has been exposed to water, like a splash of rain or salt water at the beach, it needs to be cleaned before it can be used again. The best method is to use a paper towel that has been soaked in isopropyl or an electronic cleaner.

If the key fob doesn't working even though it is not exposed to water it could be due to a glitch in the receiver module or internal electronic chip. In these situations you can reprogramme the key fob with an OBDII scanner might aid.

Water Damage

If your key fob has taken immersed in a pool or puddle, or taken a trip down the washing machine, you might have some water damage. You can usually be able to get it back up and running by removing the battery and scrubbing the circuit board with isopropyl alcohol. It is a good idea to let the fob dry completely prior to installing a new battery.

If your key fob stopped working even after replacing the battery and changing the program, you could have a malfunctioning receiver module. You can find instructions for the reprogramming of most fiat remote key replacement keys on YouTube or in the owner's manual. You can also try resetting the car's onboard computer with the OBDII scan tool.

Faulty Receiver Module

The key fob has a chip that communicates with the vehicle's system. If the chip is damaged, it will be unable to longer send and receive signals to the vehicle. This could be due to dropping the key fob or by exposure to water. If the key fob you have purchased has stopped working due to water exposure and you are unable to fix it if you clean the chip using electronic cleaner or isopropylethanol.

However, if the key fob continues to not respond following cleaning, it is likely that the receiver module is not functioning properly and will require to be replaced. A malfunctioning receiver module could also cause the remote control key to stop functioning. This is typically caused by electromagnetic interference.

Faulty Electronic Chip

The chip that is embedded in your key fob is an essential component of the anti-theft systems in your vehicle. It sends a message to the immobiliser inside your car to tell it whether the key is legitimate. If the chip is damaged or broken, the car will not start.

A defective chip could be caused by interference caused by objects, bad weather or transmitters close to your vehicle. In this instance, you will need an entirely new fiat punto key fob fob.

Contacts to the battery are not working properly.

The battery contacts of a key fob can be damaged by excessive usage. If they're bent or broken the fob will not send any signals to the receiver modules inside the car.

Modern fobs come with rubber seals that block out water. A splash of water or a light rain should be fine but submerging them into saltwater may harm the chip's electronic components.

The key fob houses chips that communicate with the vehicle's immobilizer system in order to allow it to start. The system uses the old red keys in older vehicles, or the cryptocoding system that is used in newer vehicles. If the chip is damaged it must be replaced.

A faulty 12 Volt battery

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

Before replacing the battery, test it with an voltmeter to gauge its capacity. A fully charged battery should display 12.6 volts. If the reading falls dramatically then it's time to replace the battery.

To test the battery's power, place an electrical load on it for a few minutes. This will remove 1percent of the surface charges. Then, you can measure the voltage again. The greater the battery's capacity and the longer it can maintain its voltage. Ideally, it will remain close to 12 volts several minutes.

Faulty Radio Signal

This is the main reason for a key fob that stops sending signals to the car. This issue can be resolved by replacing the battery. But, it is essential to purchase a battery that has the same voltage and size as the original.

Fobs take a lot of abuse, but they're not impervious to destruction. The battery buttons and the contacts are fragile, so they can get bent or broken with excessive use.

Other transmitters or objects operating on the same frequency may also interfere with the signal. A light-control panel in your home, for instance could interfere with key fobs that use the same frequency. This could cause interference with the remote control of your car.

Faulty OBDII scan tool

There are a variety of reasons why a scanner tool may not function. Some are more complex than others.

Professional scan tools permit mechanics to look over the car's networks and run a variety of self-tests. These can be real time savers, but they're also expensive, and beyond the budget of most DIYers.

If your OBD2 scan tool won't power on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they're both in good shape, it's likely that a fuse has blown. This is one of the most frequent causes of failures in the scan tool. The easiest fix is to replace the fuse which has blown.