10 Essentials About Fiat 500 Keys You Didn't Learn In The Classroom Fiat Panda Key Fob Replacement

Fiat Panda keyfobs are equipped with a transponder that transmits an indication from the fob to the car to open doors or start the motor. However, the key fob may not function due to a variety of reasons.

A dead coin battery is the most frequent cause of a key fob malfunction. Other causes include water damages or a damaged module and interference signals.

Dead Coin Battery

If the battery in your key fob has died, the first thing to do is replace it. Make use of a new button battery that is the same size, voltage and specification as the old one.

If the key fob was exposed to water (such as saltwater or rain at the beach) It must be cleaned before being used again. A paper towel soaked in isopropyl alcohol or electronic cleaner will be the solution.

If the key fob hasn't been exposed to water, but isn't working it could be an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob by using an OBDII scan may assist in these situations.

Water Damage

If your key fob has taken an immersion in the pool or puddle or gone through the washing machine, you might have 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 is recommended to let the circuit board completely dry before putting in the battery.

You may have a faulty module in the event that your key fob stops working after replacing the battery or reprogramming. There are reprogramming guidelines for most remote key fobs on YouTube or in the owner's manual. You could also try resetting the car's onboard computer with the OBDII scan tool.

Faulty Receiver Module

The key fob's chip is the chip that communicates the vehicle's system. If look at here now becomes damaged, it will be unable to longer transmit and receive signals to the vehicle. A key fob falling off can cause this, as can exposure to water. If the key fob has stopped working after exposure to water, it is possible to repair the issue by cleaning or cleaning the chip with isopropyl ethanol or electronic cleaner.

If the key fob won't respond to cleaning, it is possible that the receiver module has issues and needs to be replaced. A damaged receiver module may also cause the remote control key to not function. This usually happens due to electromagnetic interference.

A defective electronic chip

The electronic chip inside your key fob is an essential component of the anti-theft system in your vehicle. It sends out a signal the immobiliser unit inside your car to inform it whether or not the key is valid. Your car won't start in the event that the chip is damaged.

A damaged chip could be caused by interference signals from other objects, bad weather conditions or transmitters on the same frequency close to your vehicle. In this scenario it is likely that a new fob would be needed.

Contacts for the battery that are defective

The battery contacts inside a key fob are very delicate and can get damaged when used for long periods of time. If they are bent, or damaged, the fob will not transmit any signals to receiver modules inside the vehicle.

Modern fobs feature rubber seals to keep out water. A splash of water or light rain is acceptable However, submerging them in saltwater can harm the electronic chip.

The key fob is equipped with a chip which communicates with the immobilizer system of the vehicle to begin it. The system utilizes the old red keys that were used in older vehicles or the cryptocoding system used in the latest vehicles. This chip will need to be replaced if it's damaged.

Problems with 12 Volt Batteries

A defective battery can cause the key fob to function. When this happens, the car's computer system will not recognize that the remote is within the vehicle.

Test the battery with the help of a voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading falls significantly, it's time to replace it.

Put an electrical load for a few seconds on the battery to test its capacity. This will remove about 1% of the charge on the surface. Then measure the voltage again. The better the battery's capacity and the longer it can keep its voltage. It is ideal to maintain close to 12 volts over several minutes.

Radio Signal Faulty Radio Signal

This is the most common cause of a key fob that stops sending signals to the car. This issue can be resolved by replacing the battery. It is however important to select a replacement battery with the same size and voltage as the original one.

Fobs are subject to a lot of abuse, but they're also not impervious to destruction. Contacts on batteries and buttons can be damaged by rough handling.

A signal may also be impacted by other objects or transmitters which use the same frequency. A light-control panel at your home, for example can interfere with key fobs that use the same frequency. This can interfere with the remote control of your car.

Incorrect OBDII Scan Tool

There are many reasons why a scan tool could not work. Some are more complicated than others.


Professional scan tools allow a mechanic to monitor the car's network and perform a variety of self-tests. These tools can save time, but they're expensive and are out of reach for most DIYers.

If your OBD2 scanner won't turn on Check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If both are in good condition it's likely that a fuse has failed. This is the most common reason for failure of the scan tool. The simple fix is usually to replace the fuse that has been blown.