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Fiat Panda Key Fob Replacement

Fiat Panda keyfobs are equipped with a transponder that transmits signals from the fob to the car in order to unlock doors or turn on the motor. However, the fob could not function due to a variety of reasons.

fiat punto key fob cited reason for key fob failure is the battery of the coin is dead. Other causes include water damage an inoperative receiver module, and signal interference.

Dead Coin Battery

Replace the battery in case your key fob has died. Use a new button cell battery that has the same size, voltage, and specification as the original.

If the key fob was exposed to water, such as a splash of rain or salt water on the beach, it will need to be cleaned before it is able to be used again. The best method is to use a paper towel soaked with isopropyl or electronic cleaner.

If the key fob hasn't been exposed to water but still does not work, there may be an issue with the receiver module or an internal electronic chip. In these situations you can reprogramme the key fob using an OBDII scanner can help.

Water Damage

If your key fob has gotten submerged in a pool or puddle or gone to the washing machine, you may have some water damage. It's generally possible to get it working by taking the batteries off and cleaning the circuit board using ruby alcohol. It's a good idea to let the fob dry completely before putting in a brand new battery.

If your key fob has stopped working, even after replacing the battery and reprogramming it, you may have a faulty receiver module. There are reprogramming guidelines for most vehicles' remote key fobs on YouTube or in the owner's manual. You can also reset the computer of your car using the OBDII scanner tool.

Faulty Receiver Module

The key fob's chip is a chip which communicates with the vehicle's system. If this chip becomes damaged, it cannot longer transmit or receive signals to the vehicle. The key fob being dropped can cause this, as can exposure to water. If the key fob stopped functioning after exposure to water, it could be possible to fix the issue by cleaning the chip with isopropyl alcohol, or electronic cleaner.

If the key fob does not respond to cleaning, it's likely that the module is in an issue and must be replaced. A defective receiver module could also cause the remote control key to not function. This is often caused by electromagnetic interference.

A malfunctioning electronic chip


The electronic chip inside the key fob is an important part of the anti-theft system in your vehicle. It sends a signal the immobiliser unit of your car to inform it whether or not the key is in fact valid. The car won't start if the chip is damaged.

A defective chip can be caused by interference signals from other objects, bad weather conditions or transmitters operating on the same frequency in close proximity to your car. In this case you'll need a new key fob.

Contacts of the battery may be damaged.

The battery contacts of a key fob can be damaged by heavy usage. If they're bent, or damaged, the fob will not send any signals to the receiver modules in the vehicle.

Modern fobs are equipped with rubber seals to keep out water. Submerging them in water even if it's just an occasional drizzle or splash could damage the chip's electronic circuit.

The key fob is equipped with an electronic chip that communicates with the immobilizer system of the vehicle, allowing it to start it. The system uses the old red keys in older vehicles or the crypto coding system in newer cars. This chip will have to be replaced if faulty.

Problems with 12 Volt Batteries

A faulty battery may cause the key fob not to work. If this happens, the car's computer system won't recognize that the remote is inside the vehicle.

Before replacing the battery, test it using a an voltmeter to gauge its capacity. A fully charged battery will read 12.6 volts. If the reading falls significantly it's time to change it.

To test a battery's capacity put an electrical load on it for a couple of minutes. This will take off approximately 1% of the surface charge. After that, measure the voltage. The greater the battery's capacity, the longer it can maintain its voltage. Ideally, it will remain close to 12 volts several minutes.

Radio Signal Faulty Radio Signal

This is the most common cause of a key fob that stops sending signals to the car. The battery can be replaced to solve this problem. However, it is crucial to buy a new battery that is the same size and voltage as the original one.

Fobs aren't indestructible and are susceptible to damage. The battery buttons and the contacts are fragile, so they can get bent or broken by the force of.

Other transmitters or objects operating on the same frequency could also disrupt the signal. A light-control system in your home, for example could interfere with key fobs which use the same frequency. This can affect the remote control of your car.

Incorrect OBDII scan tool

There are many reasons why scanner tools may not perform. Certain are more complicated than others.

Professional scan tools enable mechanics to observe the car's network and perform various self-tests. They can be huge time savers but they can also be very expensive, and beyond the reach of most DIYers.

If your OBD2 scan tool isn't turning on, test the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If all is fine the fuse could have failed. This is one of the most common causes of a scan tool failing. It is generally simple to fix the issue by replacing the fuse that has blown.

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Pub: 26 Apr 2024 06:01 UTC
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