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fiat keys Panda key fobs contain an transponder chip that transmits the signal to your vehicle to unlock the doors or start the engine. The fob could stop working due to a variety of reasons.

The most frequent cause of key fob failure is the battery of the coin is dead. Other reasons include water damage, an inoperative receiver module, and signal interference.

Dead Coin Battery

Replace the battery if the key fob is dead. Make use of a new button battery with identical in size, voltage and specifications as the original.

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. A paper towel soaked in alcohol or electronic cleaner can work wonders.

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

Water Damage

If your key fob has gotten an immersion in the pool or puddle or gone down the wash machine, it could have some water damage. It is usually possible to get it working again by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It's best to let the fob dry completely before putting in a new battery.

If your key fob isn't working even after replacing the battery and changing the program, you could have a malfunctioning receiver module. You can find information on reprograming the majority of remote keys on YouTube or refer to the owner's manual. You can also reset the computer of your vehicle using the OBDII scanner tool.

Faulty Receiver Module

The key fob contains a chip which communicates with the vehicle's system. If the chip is damaged, it can no longer be able to send or receive signals to the vehicle. A key fob falling off can cause this, as can water exposure. If your key fob stopped functioning due to water exposure and you are unable to fix it if clean the chip using electronic cleaner or isopropyl ethanol.

If the key fob won't respond to cleaning, it's possible that the component has an issue and must be replaced. A malfunctioning receiver could cause the key to cease to function. This is usually due to electromagnetic interference.

Faulty Electronic Chip

The electronic chip in your key fob plays an important function in the anti-theft security system in your car. It sends a signal to the immobiliser unit inside your car to inform it whether the key is in fact valid. Your car will not start in the event that the chip is damaged.

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

Contacts for the battery that are damaged

The battery contacts on the fob's battery can be damaged by heavy usage. If they are damaged or bent, the fob will not transmit any signals to the receiver modules in the car.

Modern fobs have rubber seals that block out water. Immersing them in water, even if it's only small splash or drizzle could damage the chip's electronic circuit.

The key fob has the chip that connects to the vehicle's immobilizer system to activate it. This system utilizes cryptocoding systems in vehicles that are more modern as well as the traditional red key system in older ones. If the chip is damaged, it will need to be replaced.

Problems with 12 Volt Batteries

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

Before you replace the battery, test it by using a an voltmeter for determining its capacity. A fully charged battery should read 12.6 volts. If the reading falls significantly then it's time to replace it.

Place an electrical load for a short time on the battery to check its capacity. This will take off about 1 percent of the charge on the surface. After that, measure the voltage. The longer a battery is able to keep its voltage steady greater is its capacity. The ideal scenario is to keep it close to 12 volts for several minutes.

Radio Signal Faulty Radio Signal

This is the most frequent reason for the key fob not sending signals to cars. This issue can be resolved by replacing the battery. It is crucial to purchase an identical battery voltage and dimensions as the original.

The buttons are not impervious to destruction and can take a lot. Battery contacts and buttons can be damaged through rough handling.

A signal can also be affected by other objects or transmitters who use the same frequency. For instance, a light-control panel in your home could send interference on the same frequency that key fobs utilize. This could affect the remote control in your car.

Afflicted OBDII scan tool

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

Professional scan tools enable mechanics to monitor the car's networks and run various self-tests. These tools can save a lot of time, but are costly and are out of reach for most DIYers.

If your OBD2 scan tool won't power on, check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If these are OK the chances are that a fuse has blown. This is one of the most frequent causes of failures in the scan tool. The most straightforward fix is to replace the blown fuse.