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Fiat Panda Key Fob Replacement

Fiat Panda keyfobs are equipped with a transponder that sends an electronic signal from the fob to the car in order to unlock doors or start the motor. The fob may stop working due to a variety of reasons.

A dead coin battery is the most common reason for the malfunction of a key fob. Other causes are water damage as well as a defective module and interference signals.

Dead Coin Battery

Replace the battery if the key fob has gone out of service. Choose a new button battery that has exactly the same size, voltage and specification as the previous one.

If the key fob was exposed to water (such as saltwater or rain at the beach) it should be cleaned prior to using it again. The best way to do this is using the paper towel and soak it in isopropyl or electronic cleaner.

If the key fob is not working even though it is not exposed to water it could be due a malfunction in the receiver module or in the internal electronic chip. Reprogramming the keyfob using an OBDII scan may assist in these situations.

Water Damage

If your key fob took submerged in a pool or puddle, or taken a trip down the washing machine, you may have some water damage. It's possible to fix it by taking out the batteries and cleaning the circuit board using ruby alcohol. It is recommended to let the circuit board completely dry before putting in batteries.

You could have a damaged module when your key fob ceases working after replacing the battery or changing the programming. You can find reprogramming procedures for most remote key fobs on YouTube or in the owner's manual. You can also reset the car's computer using the OBDII scanner tool.

Faulty Receiver Module


The key fob is equipped with a chip that communicates with the car's system. The chip will stop sending and receiving signals to the car if it becomes damaged. A key fob falling off can cause this, as could exposure to water. If the key fob stopped functioning after exposure to water, it is possible to repair the issue by cleaning or cleaning the chip using isopropyl alcohol or an electronic cleaner.

However, if the key fob still does not respond following cleaning, you can be sure that the module is faulty and needs to be replaced. A defective receiver module could also cause the remote control key to not function. This is typically caused by electromagnetic interference.

Faulty Electronic Chip

The chip that is embedded in the key fob is an important element of the anti-theft device in your car. It sends out a signal the immobiliser unit in your car to inform it whether or not the key is valid. If the chip is damaged or broken, your car will not start.

A malfunctioning chip can be caused by interference from other objects, weather conditions or transmitters near your vehicle. In this scenario, a new fob will be needed.

Contacts of the battery may be damaged.

The battery contacts in the key fob are fragile and are susceptible to damage when used for long periods of time. If they're damaged or bent, the key fob won't send any signals to the receiver modules in the car.

Modern fobs come with rubber seals to keep out water. In the event of submerging them in water, even if just small splash or drizzle can harm the chip's electronic circuit.

The key fob contains a chip which communicates with the immobilizer system of the vehicle, allowing it to start it. The system relies on cryptocoding systems in newer vehicles or the red key system for older ones. If the chip is damaged and needs to be replaced.

A faulty 12 Volt battery

A damaged battery could cause the key fob not to function. When this occurs the car's computer cannot recognize that the remote is within the vehicle.

Before you replace the battery, test it with an voltmeter for determining its capacity. A fully charged battery should read 12.6 volts. If i was reading this falls dramatically, it is time to replace the battery.

Set 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 once more. The longer a battery is able to keep its voltage steady and the higher its capacity. Ideally, it should remain at 12 volts or less for several minutes.

Radio Signal Faulty Radio Signal

This is the main reason for the key fob not sending signals to a car. The battery could be replaced to fix this problem. It is crucial to buy a battery with the same dimensions and voltage as the original.

Fobs take a lot of abuse, but they're also not impervious to destruction. The battery contacts and buttons could be damaged by rough handling.

Full Guide or transmitters using the same frequency could also disrupt a signal. For instance, a light-control panel that is near your home could transmit interference on the same frequency that key fobs utilize. This could cause interference with your car's remote control.

Faulty OBDII scan tool

There are a variety of reasons why scanners don't function. Certain are more complicated than others.

Professional scan tools permit mechanics to examine the car's systems and run a range of self-tests. These are real time savers, however they can also be very expensive, and out of the budget of most DIYers.

If your OBD2 scanner won't start examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If they are all OK it could be that a fuse has failed. This is one of the most common causes of scan tool failure. It is usually simple to fix the issue by replacing the fuse blowing up.

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