Fiat Panda Key Fob Replacement

Fiat Panda keyfobs are equipped with a transponder that transmits an indication from the fob to the car that allows it to unlock doors or start the motor. The fob could stop working due to a variety reasons.

A dead battery for the coin is the most common cause of the malfunction of a key fob. Other reasons include water damage, an inoperative receiver module and signal interference.

Dead Coin Battery

Replace the battery if your key fob has gone out of service. Use a button cell with the same voltage, size and specifications as the old one.

If the key fob was exposed to water, for example a splash of rain or salt water at the beach, it needs to be cleaned before it is able to be used again. The best solution is to use a paper towel soaked with isopropyl, or electronic cleaner.

If the key fob isn't working despite being not exposed to water, it could be due to a malfunction in the receiver module or an internal electronic chip. In these situations it is possible that reprogramming the key fob with an OBDII scanner can help.

Water Damage

There could be water damage if your key fob was submerged in a puddle, pool or washing machine. It is usually possible to get it working by getting rid of the batteries and cleaning the circuit board using ruby alcohol. It's a good idea to allow the fob to dry completely before putting in a new battery.

If your key fob isn't working, even after replacing the battery and changing the program, you could have a problem with the receiver module. There are instructions for reprogramming most vehicles' remote keys on YouTube, or consult the owner's manual. You can also reset your computer of your car using the OBDII scanner tool.

Faulty Receiver Module

The key fob is equipped with an electronic chip that communicates with the car's system. If the chip is damaged, it cannot longer transmit and receive signals to the vehicle. A key fob falling off can cause this, as can exposure to water. If your key fob isn't functioning due to exposure to water and you are unable to fix it by attempting to clean the chip using electronic cleaner or isopropyl alcohol.

However, if the key fob does not respond after cleaning it there is a good chance that the receiver module is not functioning properly and will need to be replaced. A malfunctioning receiver could cause the key to stop working. This is typically caused by electromagnetic interference.

A malfunctioning electronic chip

The electronic chip inside your key fob plays a crucial function in the anti-theft security system in your car. It transmits a message the immobiliser inside your car to inform it whether the key is legitimate. fiat punto car key won't start when the chip is damaged.

A malfunctioning chip could be caused by interference signals from objects like bad weather conditions or transmitters operating on the same frequency close to your car. In this scenario you'll require a new key fob.

Contacts of the battery may be damaged.

The battery contacts inside a key fob are very delicate and could be damaged through repeated use. If they are damaged or bent, the key fob won't send any signals to the receiver modules in the car.

Modern fobs have rubber seals that block out water. A splash of water or light rain is fine, but submerging them in saltwater can damage the electronic chip.

The key fob comes with an embedded chip that communicates to the immobilizer system of the vehicle, allowing it to start it. This system makes use of cryptocoding systems in newer vehicles or the red key system for older ones. If the chip is not working properly it will have to be replaced.

Problems with 12 Volt Batteries

A malfunctioning battery could cause the remote to stop working. The car's computer won't recognize the remote when this happens.

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


To test the battery's capacity to determine its capacity, put an electric load on it for a couple of minutes. This will eliminate 1percent of the surface charges. Then, measure the voltage once more. The higher the capacity of the battery is, the longer it will keep its voltage. It is ideal to maintain close to 12 volts over several minutes.

Radio Signal Faulty Radio Signal

This is the most typical reason for a key fob that stops sending signals to the car. The battery can be replaced to solve this issue. However, it is important to select a replacement battery with the same voltage and size as the original.

Fobs are subject to a lot of abuse, and they aren't indestructible. Battery contacts and buttons can be damaged by rough handling.

Other objects or transmitters using the same frequency could also disrupt the signal. A light-control panel at your home, for instance can interfere with key fobs that have the same frequency. This could affect the remote control of your car.

Faulty OBDII scan tool

There are many reasons why scanners don't perform. Certain are more complicated than others.

Professional scan tools enable mechanics to observe the car's network, and run various self-tests. These are real time-savers, but they can be expensive, out of the budget of many DIYers.

If your OBD2 scanner isn't turning on make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If they are all OK, a fuse may have failed. This is among the most frequent causes of a scan tool failing. The easiest solution is to replace the fuse which has blown.