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Reasons Your Fiat 500 Key Fob Won't Work

A fiat 500 key fob is a handy way to unlock the doors and start the car. There are many reasons why the fob won't work. These include a dead coin battery or damaged receiver module, water damage issues, and interfering.

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Dead Coin Battery

A dead battery is probably the most common cause of your 500 key fob not working. Modern key fobs offer a limited range of operation and must be within 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 a "Key Fob Not Detected" message in the instrument cluster.

If this happens then replace the battery for your coin-cell (Part Number CR2032) with a new battery from a reputable brand such as Panasonic Duracell or Energizer. You can typically find them in your local hardware store, or online.

You can test the battery on your coin-cell by pressing the buttons while standing close to your Fiat 500. The parking lights should flash and the key fob will operate the lock and unlock switch.

If the fob's remote doesn't function after replacing the battery, it could have water damage that prevents it from communicating with the receiver module in your car. Water damage can happen in a variety of ways, such as an easy splash or submerging your key fob in saltwater at the beach. If you suspect that your fob was exposed to water, you can place it in a bag of rice to draw out the moisture. If this does not work, you'll have to get your fob reprogrammed either by an auto locksmith or dealer.

Water Damage

While the fob has some rubber seals to keep water out of the electronic chip inside, submerging it in the ocean or washing it in a machine could cause water damage. Saltwater poses a particular risk to the circuit board of the fob that can cause it to short out and eventually die. Getting the fob wet is not an ideal idea however, if you drop it into an empty cup of water, or fail to remove it from your pants pocket before running the washing machine, don't give up hope.

First, remove the battery. Before replacing the battery, clean the electronic chip using isopropyl or another similar product. Check the fob to verify if it's working. If the fob doesn't work, it may have to be reprogrammed. This is typically handled by a dealer or professional auto locksmith.

If the key you have is older and has not been programmed for your vehicle, you will need to replace it completely. This is a straightforward process that can be completed by a professional automotive locksmith. The locksmith will need the key to be cut to match the car's ignition. They'll also need to reprogram the fob to your car's system. It's a simple and cost-effective process that can be completed the next day.

Receiver Module Issues

The 500 key fob you have may stop working because it is out of range. The remote has a maximum range of 30 feet, so if you are too far away from your vehicle it won't respond to your commands. This can be fixed by moving closer to your vehicle until it starts responding.

If you've replaced the battery in your coin (commonly known as a "button" or "watch") and your fob still won't work, it could have an internal circuit board issue. In the majority of cases, reprogramming your fob will resolve this issue. The instructions are available for most vehicles on YouTube or in the owner's guide.

You may need to replace the metal retaining clips that hold the coin battery. If they become loose, it can stop your coin battery from sitting properly and cause your remote to malfunction.

In rare cases the fob might become disconnected from your vehicle due to software issues or hardware issues. You can fix this issue by visiting your local auto-locksmith or dealer to reprogram your key fob. In some cases the software may require reinstallation to your body control modules.

Interference

In addition to a dead battery on a coin The spare key for fiat 500 fob might not be able to transmit or receive a signal due to interference. This could occur if the keyfob is in close proximity to a radio transmitter such as a cell phone or radar detector. Other reasons why the key fob may not function include a poor connection to the buttons or the internal chip, or water damage.

If your key fob suddenly stopped working, or you've tried everything at home to fix it (e.g. It could be a defective 500 receiver module If you've tried replacing it with a battery, reprogramming it, or using an alternative key fob. The receiver module, located under the dashboard, is able to pick up radio frequency signals from your key fob. Then, it converts them into electronic commands that the vehicle interprets.

There's a quick and easy way to reset the 500's onboard system including the keyfob. Disconnect the battery for 15 minutes, removing first the negative cable, then the positive cable. Reconnect the battery. This will erase any remaining electricity, and allow you to restart the computer of your car. This can help get your key fob working again. If the problem persists it is recommended that you consult an experienced technician. They will be able to determine the root of your problems.