Reasons Your fiat ducato remote key programming key duplication - Truelsen Kristiansen 2 Hubstack said in a blog post, 500 Key Fob Won't Work

A Fiat 500 key fob makes it easy to open doors and start your car. However, there are numerous reasons why the key fob might stop functioning. This includes a dead coin-battery or water damage, issues with the receiver module, and interference.

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Dead Coin Battery

A dead battery is the most common cause of your 500 key fob not working. Modern key fobs only have limited operating range and must be within just a few inches of the vehicle in order to work. If you are far from your vehicle and you press the key fob button, the car won't respond and will display the "Key Fob Not Detected" message in the instrument cluster.

If this occurs, replace the coin-cell battery (Part Number CR2032) with a new battery of a reliable brand, like Panasonic Duracell or Energizer. You can typically find them in your local hardware store or online.

After you've changed the battery on the coin cell you can test it by standing close to your fiat 500 car keys 500 and pressing the buttons. The car will flash its parking lights, and the key fob should work the lock and unlock switches.

If the fob's key doesn't work after replacing the battery, it could be damaged by water, which prevents it from communicating with the receiver module inside your car. Water damage can occur through a variety of methods, including simply splashing or submerging the key fob in saltwater at the beach. If you believe your fob was exposed to water, you can place it in a bag of rice to draw out the moisture. If this doesn't work, your fob will probably require reprogramming by an experienced auto locksmith or the dealer.

Water Damage

While the fob has some rubber seals to keep water from the chip's electronic circuit and out of the ocean or washing it in a machine can cause water damage. Saltwater can be particularly harmful to the circuit board of the fob and can cause it to short out and eventually die. In the event that you let your fob get wet, it's not a good idea but if you accidentally drop it in the water in a cup or fail to take it out of your pants pocket prior to running the washer, don't give up hope.

Remove the battery first. Clean the electronic chip with isopropyl ethanol or a similar product and dry it completely before replacing the battery. Test the fob next to see if it is working. If the fob doesn't work, it may need to be changed. This is usually done by an auto locksmith or dealer.

If the key is a newer model and hasn't been programmed to your car, it will likely need to be replaced completely. This is a simple process that can be handled by a professional locksmith for automotive use. The locksmith needs to cut the key to match the ignition of your vehicle. The locksmith also needs to program your fob into the car's system. This is a quick and cost-effective procedure that is usually completed on the same day.

Receiver Module Issues

One of the main reasons your 500 key fob may stop working is because it's out of range. The remote has a range of 30 feet, which means should you be too far from your car it won't be able to respond to your commands. It's easy to fix this by moving the remote closer to your vehicle until it responds.

If you've replaced the coin battery (commonly called"button" or "button" or "watch") and your fob doesn't function, it could have an internal circuit board problem. Reprogramming the fob is usually the solution to the issue. You can find the steps for the majority of vehicles on YouTube or in the owner's guide.

It is possible to replace the metal retaining clips that keep the coin battery. If they lose tension, it could prevent your coin battery from being properly seated and cause your remote to malfunction.

In rare instances, the fob might be out of alignment with your vehicle because of hardware or software problems. This issue can be fixed by visiting your local dealer or auto-locksmith to reprogram your key fob. In certain situations they may have to install the software again in your body control module as well.

Interference

Interference can also cause the key fob to not receive or transmit a signal. This may happen if the keyfob is in close proximity to a radio transmitter like a cell phone or radar detector. Other reasons why the key fob may not function could be due to a weak connection to the buttons or the internal chip, or water damage.

If your key fob suddenly stopped working, or if you have tried everything at home to resolve it (e.g. replacing the battery, reprogramming, and using the spare key fob, you could have a malfunctioning receiver module on your 500. The receiver module, located under the dashboard, detects radio frequency signals from your key fob. It converts them to electronic commands that the vehicle interprets.

Fortunately, there's an easy method to reset all of the onboard systems in your 500 device, including the key fob. Disconnect the battery for 15 minutes, fiat key duplication removing first the negative cable, then the positive cable. Then, reconnect the battery. This will clear out any remaining electrical charge and restart the car's computers. This can help you the key fob to function again. If the issue persists, you should seek the advice of an expert technician. They can identify the root of any issues.