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fiat punto replacement key Panda keyfobs are equipped with a transponder that sends an indication from the fob to the car to open doors or turn on the motor. However, the fob may not function due to a variety of reasons.

A dead battery for the coin is the most frequent reason for key fob malfunctions. Other causes include water damage as well as a defective module and interference signals.

Dead Coin Battery

If your key fob's battery has died, the first thing to do is replace it. Choose a new button battery with identical in size, voltage, and specification as the old one.

If the key fob was exposed to water, such as a splash of rain or salt water at the beach, it's going to need to be cleaned before it is able to be used again. The best method is to use 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 to a glitch in the receiver module or in the internal electronic chip. In these instances it is possible that reprogramming the key fob with an OBDII scanner may assist.

Water Damage

If your key fob's battery has taken immersed in a puddle or pool or gone down the washing machine, it could have some water damage. It is usually possible to get it working by removing the batteries and cleaning the circuit board using rubbing alcohol. It's a good idea to allow the fob to dry completely before installing a new battery.

You may have a faulty module if your key fob stops working after replacing the battery or changing the programming. You can find instructions for reprograming the majority of remote keys on YouTube or consult your owner's manual. You can also try resetting the car's onboard computer using the OBDII scan tool.

Faulty Receiver Module

The key fob is equipped with an electronic chip that communicates with the vehicle'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 through exposure to water. If the key fob stopped working after water exposure it may be possible to repair the issue by cleaning or cleaning the chip using isopropyl alcohol or an electronic cleaner.

However, if the key fob continues to not respond after cleaning it it is likely that the module is defective and will need to be replaced. A damaged receiver module may also cause the remote control key to stop working. This is often caused by electromagnetic interference.

Faulty Electronic Chip

The electronic chip in your key fob is a vital part in the anti-theft security system of your vehicle. It transmits a message the immobiliser in your car to inform it whether the key is genuine. The car won't start if the chip is damaged.

A damaged chip could be caused by interference signals from other objects such as weather conditions, objects or transmitters on the same frequency as your vehicle. In this situation you'll require an entirely new key fob.

Faulty battery contacts

The battery contacts on a key fob can be damaged by heavy usage. If they are broken or bent, the fob will not send any signals to the receiver modules inside the car.

Modern fobs come with rubber seals to keep 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 contains the chip that connects to the vehicle's immobilizer in order to start it. The system is based on the old red keys that were used in older vehicles as well as the cryptocoding system that is used in newer cars. The chip must be replaced if defective.

Faulty 12 Volt Battery

A defective battery can cause the key fob to function. The car's computer may not recognize the remote if this happens.

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

To test the battery's capacity, place an electrical load on it for a few minutes. This will take off about 1% of the surface charge. Then measure the voltage again. The longer the battery is able to hold its voltage, the better its capacity. Ideal is to hold close to 12 volts during several minutes.

The radio signal is not working properly. Radio Signal

This is the main reason for the key fob not sending signals to a car. The battery is able to be replaced to resolve this problem. It is important to buy an identical battery dimensions and voltage as the original.

Fobs are subject to a lot of abuse, but they're not indestructible. The battery buttons and the contacts are fragile and can be bent or damaged by rough use.

A signal may also be impacted by other transmitters or objects that operate on the same frequency. A light-control panel at your home, for instance can interfere with key fobs which use the same bandwidth. This could affect the remote control in your car.

Problems with OBDII Scan Tool

There are a number of reasons why a scanner could not work. Some are more complex than others.

Professional scan tools enable mechanics to look over the car's networks and perform a variety of self-tests. These are great time savers, but they're also expensive, and out of the budget of many DIYers.

If your OBD2 scan tool isn't turning on, make sure you check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If they're both in good shape, it's likely that a fuse has failed. This is among the most frequent causes of a scan tool failing. It is generally easy to fix the issue by replacing the fuse that has blown.