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fiat punto remote key Panda key code fiat fobs contain a transponder chip that sends signals to your car to open the doors or start the engine. However, the fob may stop working due to a variety of causes.

The most commonly cited reason for key fob malfunction is the battery of the coin is dead. Other causes include water damage or a damaged module and interference signals.

Dead Coin Battery

Replace the battery if your key fob has died. Choose a button battery that has the same voltage, size, and specifications as your 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 method is to use a paper towel that has been soaked in isopropyl, or electronic cleaner.

If the key fob has not been exposed to water but it is still not working it could be an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob with an OBDII scan may help in these instances.

Water Damage

If your key fob's battery has taken a bath in the pool or puddle, or taken a trip to the washing machine, you could be suffering some water damage. It is usually possible to be able to get it back up and running by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It's best to let the board completely dry before installing batteries.

If your key fob has stopped working even after replacing the battery and reconfiguring it, you may have a faulty receiver module. You can find reprogramming procedures for all vehicles' remote key fobs on YouTube or in the owner's guide. You can also try resetting the car's computer onboard using the OBDII scan tool.

Faulty Receiver Module

The key fob's chip is the chip that communicates with the vehicle's system. If this chip becomes damaged, it cannot longer transmit or receive signals to the vehicle. A key fob falling off can result in this, as can exposure to water. If the key fob has stopped working after exposure to water, it is possible to fix it by cleaning the chip using isopropyl alcohol, or electronic cleaner.

If the key fob still does not respond even after cleaning it there is a good chance that the module is defective and must be replaced. A faulty receiver module can also cause the remote control key to cease functioning. This is usually caused by electromagnetic interference.

Faulty Electronic Chip

The electronic chip inside your key fob is an essential part of the anti-theft system in your car. It transmits a message to the immobiliser in your car to inform it that the key is valid. If the chip is damaged or broken, your vehicle will not start.

A damaged chip could be caused by interference from objects, bad weather or transmitters near your vehicle. In this instance it is likely that a new fob would be needed.

Contacts with the battery may be damaged.

The battery contacts on the fob's key can be damaged through heavy use. If they're bent, or broken, the fob won't send any signals to the receiver modules in the vehicle.

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

The key fob comes with a chip which communicates with the immobilizer system of the vehicle to begin it. The system utilizes the red keys of older vehicles as well as the cryptocoding system that is used in the latest vehicles. If this chip is faulty and needs to be replaced.

Problematic 12 Volt Battery

A damaged battery can cause the key fob to cease to function. The car's system will not recognize the remote if this happens.

Test the battery with an voltmeter prior to replacing it to determine its capacity. A fully charged battery should read 12.6 volts. If the reading drops dramatically then it's time to replace it.

To determine the capacity of a battery to determine its capacity, put an electric load on it for a few minutes. This will eliminate about 1% of the charge on the surface. After that, take the voltage again. The longer a battery is able to hold its voltage greater is its capacity. The ideal is to keep it close to 12 volts over several minutes.

Radio Signal Faulty Radio Signal

This is the main reason for a key fob to stop sending signals to vehicles. This issue can be fixed by replacing the battery. It is important to buy an identical battery voltage and dimensions as the original.

Fobs endure a lot of abuse, and they aren't indestructible. The battery buttons and the contacts are fragile which means they could be bent or broken by the force of.

A signal can also be interrupted by other transmitters or objects that use the same frequency. A light-control system in 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 may not work. Some are more complex than others.

Professional scan tools enable mechanics to examine the car's systems and conduct a variety self-tests. These tools can save you a lot of time, but they're expensive and out of reach for most DIYers.

If your OBD2 scanner isn't turning on Check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If both are in good condition the fuse could have ruptured. This is the main cause of scan tool failure. It is generally easy to fix the issue by replacing the fuse blowing up.