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Reasons Your Fiat 500 Key Fob Won't Work

A key fob for the Fiat 500 allows you to easily open doors and start your car. However, there are many reasons why the key fob might stop working. These include a dead coin battery damage to the receiver module, water issues, and interference.

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Dead Coin Battery

A dead battery is the most common reason for your 500 key fob not working. Modern key fobs come with a restricted operating range, and should be within only a few feet from the vehicle to operate. If you're not close to your vehicle and you press the key fob button the car won't be able to respond, and will display a "Key Fob Not Detected" message in the instrument cluster.

If this occurs then replace the battery for your coin-cell (Part Number CR2032) by a new one of a reliable brand, like Panasonic Duracell or Energizer. They are usually available in your local hardware store or online.

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

If the key fob doesn't function after replacing the battery, it could have water damage that stops it from connecting to the receiver module inside your car. Water damage can happen in many ways, including a simple splash or submerging the key fob into saltwater at the beach. If you suspect your fob has been exposed to water, you can try placing it in a dry rice bag to draw the moisture out. If this doesn't work your fob may require reprogramming by a professional auto locksmith or dealer.

Water Damage

Water damage can occur when you immerse the fob in the ocean, or wash it in a washing machine. Saltwater is particularly dangerous to the fob's circuit board and can cause it to short out and eventually end up dying. If you get the fob wet, it's not an option however, if you drop it in a glass of water or forget to remove it from your pants pocket before running the washing machine, don't give up hope.

First take the battery off the fob. Before replacing the battery, clean the electronic chip with isopropyl or a similar product. Then, test the fob to see if it works. If the key still doesn't work, it may have to be reprogrammed. This is usually handled by an auto locksmith or dealer.

If the key is a newer model and has never been programmed to your vehicle, it will likely need to be replaced completely. This is a simple process that can be completed by a professional automotive locksmith. The locksmith must cut the key to match the ignition of your vehicle. The locksmith will also need to program your fob into the car's system. This is a fast and inexpensive process which can be completed on the next day.

Receiver Module Issues

One of the simplest reasons why your 500 key fob may stop working is because it's out of range. The remote usually has an area of 30 feet or less and if it's far from your car, it won't respond to your commands. You can remedy this by moving your remote closer to your car until it responds.

If your fob does not work after replacing the coin battery, also called a "button", "watch" or "button" or "button", it may be due to a malfunction on the internal circuit board. In most cases, reprogramming the fob will fix the issue. You can find the procedure for the majority of vehicles on YouTube or in the owner's guide.

You may need to replace the metal retaining clips that keep the coin battery in place. If they lose tension, it can prevent the coin battery from being properly seated and can cause your remote to malfunction.

In rare cases, fiat Punto car Key the fob may become disconnected from your vehicle due to software or hardware issues. This can cause a major issue, but you are able to often fix this by visiting a local dealer or auto locksmith to have them reprogram your fob for you. In certain instances, the software may also require reinstallation to your body control modules.

Interference

Interference can also cause the key fob to not receive or transmit signals. This is possible when the key fob is in proximity to the radio transmitter (cell phones and radar detectors) or any other source of electromagnetic radiation. The key fob may not function because of a weak connection to the buttons or water damage, or damage to the internal chips.

If your key fob suddenly stopped working, or you've tried everything at home to resolve it (e.g. battery replacement, reprogramming and using the spare key fob, it could have a faulty receiver module on your 500. The receiver module is located under the dash and picks up the radio frequency signals from the key fob. It converts them into electronic commands that the vehicle interprets.

There's a simple method to reset the 500's internal system, including the keyfob. Disconnect the battery 12 volt for about 15 minutes, by taking off the negative cable first then the positive cable. Then, reconnect the battery. This will eliminate any remaining electricity, and restart the computer in your car. This will help you get your key fob to work again. If the issue continues, you should seek the advice of an expert technician. They will be able diagnose the exact cause of any issues.