This Is The Fiat 500 Keys Case Study You'll Never Forget Fiat Panda Key Fob Replacement

Fiat Panda key fobs contain transponder chips that send the signal to your vehicle to unlock the doors or start the engine. However, the fob could stop working due to a variety of causes.

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

Dead Coin Battery

Replace the battery if your key fob has died. Make use of a button cell battery with the same voltage, size, and specifications as the old one.

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

If the key fob isn't working despite not being exposed water, it could be due to a glitch in the receiver module, or even in the internal electronic chip. In these situations, reprogramming the key fob with an OBDII scanner may aid.

Water Damage

You could have water damage if your key fob was submerged in a puddle, pool or washing machine. You can usually get it working again by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's a good idea let the fob dry completely prior to installing a new battery.

You may have a faulty module in the event that your key fob stops working after replacing the battery or changing the programming. You can find reprogramming procedures for most vehicles' remote key fobs on YouTube or in your owner's guide. You can also reset your computer in your car with the OBDII scanner tool.

Faulty Receiver Module

The key fob's chip is a chip that connects to the car's system. If the chip is damaged, it cannot longer transmit and receive signals to the vehicle. This can be caused by dropping the key fob or by exposure to water. If the key fob is not functioning after exposure to water, it may be possible to repair the issue by cleaning or cleaning the chip with isopropyl alcohol or electronic cleaner.


If the key fob is still unable to not respond after cleaning it, it is likely that the module is faulty and will need to be replaced. A defective receiver module could also cause the remote control key to cease functioning. This is often caused by electromagnetic interference.

Faulty Electronic Chip

The chip that is embedded in your key fob is an important component of the anti-theft system in your vehicle. It sends a signal to the immobiliser unit of your car to determine whether the key is genuine. Your car won't start in the event that the chip has been damaged.

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

Contacts of the battery may be damaged.

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

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

The key fob has an electronic chip that communicates with the vehicle's immobilizer system in order to activate it. This system uses crypto coding systems in modern vehicles or the red key system for older models. The chip must be replaced if it's malfunctioning.

Poor 12 Volt Battery

A defective battery can cause the key fob not to function. The car's system will not recognize the remote when this occurs.

Before replacing the battery, test it with a voltmeter to determine its capacity. A fully charged battery will read 12.6 volts. If fiat 500 key cover falls dramatically then it's time to replace the battery.

Place an electrical load for a few seconds on the battery to test its capacity. This will eliminate about 1 percent of the charge on the surface. Then measure the voltage again. The longer a battery can keep its voltage steady, the better its capacity. Ideally, it should remain close to 12 volts for several minutes.

Radio Signal Faulty Radio Signal

This is the main reason for a key fob to stop sending signals to a car. The battery can be replaced to solve this issue. It is crucial to purchase batteries that have the same voltage and dimensions as the original.

Fobs take a lot of abuse, and they aren't indestructible. The battery contacts and buttons could be damaged by rough handling.

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

Faulty OBDII Scan Tool

There are many reasons scanners may not perform. Certain are more complicated than others.

Professional scan tools let mechanics to monitor the car's network and run various self-tests. These tools can save you a lot of time, but they're expensive and not accessible to most DIYers.

If your OBD2 scan tool won't power on, check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they're all fine it could be that a fuse has failed. This is the most typical reason for failures of the scanner. The most straightforward fix is to replace the fuse that is blowing up.