Fiat Panda Key Fob Replacement

Fiat Panda key fobs contain a transponder chip that sends signals to your car to unlock the doors or start the engine. The fob could stop working due to a variety reasons.

The most commonly cited reason for key fob failure is the battery of the coin is dead. Other causes include water damages as well as a defective module and interference signals.

Dead Coin Battery

If your key fob's battery has gone out of service, the first thing to do is replace it. Make use of a button cell battery that has the same voltage, size and specifications as the previous one.

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

If the key fob is not working despite being not exposed to water, it could be due a malfunction in the receiver module, or even in the internal electronic chip. In these cases you can reprogramme the key fob using an OBDII scanner can aid.

Water Damage

If your key fob's battery has taken submerged in a pool or puddle or even a trip down the washing machine, you might have some water damage. It's possible to repair it by taking out the batteries and cleaning the circuit board with rubbing alcohol. It is a good idea to let the fob dry completely before installing a new battery.

If your key fob stopped working even after replacing the battery and programming it again, you might have a faulty receiver module. There are reprogramming guidelines for the majority of vehicles' remote key fobs on YouTube or in your 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 is equipped with an electronic chip that communicates with the car's system. The chip will stop sending and receiving signals to the car when it is damaged. The key fob being dropped can cause this, as can water exposure. If the key fob has stopped working after water exposure it may be possible to repair the issue by cleaning or cleaning the chip using isopropyl ethanol or electronic cleaner.

If the key fob still does not respond following cleaning, it is likely that the component is damaged and must be replaced. A defective receiver module could also cause the remote control key to stop working. This is usually caused by electromagnetic interference.

Electronic chip that is malfunctioning

The electronic chip in your key fob plays a crucial role in the anti-theft security system of your car. It transmits a message to the immobiliser inside your car to inform it whether the key is genuine. If the chip is damaged or broken, the car won't start.

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

Contacts to the battery are not working properly.

The battery contacts on the key fob are delicate and can get damaged through repeated use. If they are bent or broken the fob will not be able to send any signals to the receiver modules in the car.

Modern fobs are designed with rubber seals in order to keep out water. Immersing them in water, even if it's only an occasional drizzle or splash, can damage the chip's electronic components.

The key fob has chips that communicate with the vehicle's immobilizer to allow it to start it. The system relies on cryptocoding systems in newer vehicles as well as the traditional red key system for older models. The chip must be changed if it is defective.

Problems with 12 Volt Batteries

A faulty battery may cause the key fob to work. If this happens the car's computer will not recognize that the remote is inside the vehicle.

Before replacing the battery, test it by using a a voltmeter to determine its capacity. A fully charged battery should display 12.6 volts. If the reading falls dramatically it is time to replace the battery.


To test the battery's capacity put an electrical load on it for a couple of minutes. This will take off approximately 1% of the surface charge. Then, measure the voltage once more. The longer the battery can keep its voltage steady more effectively, the greater its capacity. Ideally, it will remain close to 12 volts several minutes.

The radio signal is not working properly. Radio Signal

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

Fobs are not indestructible and can be damaged by a lot. The battery contacts and buttons are delicate and can be bent or broken with excessive use.

Other transmitters or objects using the same frequency can also interfere with a signal. For example, a light-control panel in your home could send interference on the same frequency that key fobs use. This could cause interference with the remote control in your car.

The tool is not working properly. OBDII scan tool

There are a number of reasons why a scan tool could not work. Some are more complex than others.

Professional scan tools enable mechanics to observe the car's network and perform various self-tests. These tools can save you a lot of time, but are costly and out of reach for the majority of DIYers.

If your OBD2 scanner won't turn on examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If all is fine, a fuse may have failed. This is among the most common causes of scan tool failure. G28 Car Keys is usually easy to fix the problem by replacing the blown fuse.