Reasons Your Fiat 500 Key Fob Won't Work

A key fob for Fiat 500 makes it simple to open doors and start your car. However, there are a variety of reasons the fob could stop working. This could be due to a dead battery and water damage, as well as problems with the receiver modules, and interference.

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Dead Coin Battery

A dead battery is the most common reason for your 500 key fob not functioning. Modern key fobs have a limited range of operation, and must be within some feet of the car to operate. If you are not within your vehicle, and you press the keyfob button it won't respond and display the message "Key Fob Not Detected".

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

After you've replaced the battery of your coin cell You can test it by standing close to your Fiat 500 and pressing the buttons. The parking lights will flash and the key fob will operate the lock and unlock switch.

If the fob's key doesn't work after replacing the battery, it may be damaged by water that blocks it from communicating with the receiver module inside your car. Water damage can happen through a variety of methods, including the simple splash or submerging your key fob in saltwater at the beach. If you suspect your fob was exposed to water, try putting it in a dry rice bag to draw the moisture back out. If this doesn't work, you will require your fob to be reset by an auto locksmith or dealer.

Water Damage

Water damage can occur when you immerse the fob into the ocean, or wash it in a washer. Saltwater can cause the circuit board to become shorted and eventually end up dying. It's not a good idea to let the fob get wet but don't give up if you accidentally drop it in water or fail to take it out of your pocket.

Remove the battery first. Clean the electronic chip with isopropyl ethanol or a similar product and then dry it completely before replacing the battery. Then test the fob to check if it functions. If the key isn't working, it may have to be reset. This is usually done by an auto locksmith or dealer.

If the key is a newer model and has not been programmed to your vehicle It will most likely need to be replaced 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 have to reprogram the fob to your car's system. It's a simple and cost-effective procedure which can be completed within the same day.

Receiver Module Issues

One of the most common reasons your 500 key fob may stop functioning 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. This can be fixed by moving it closer to your vehicle until it begins responding.

If your fob isn't working after you replace the battery in the coin, also called a "button", "watch" or "button" It could be due to a problem with the circuit board inside. Reprogramming the fob typically resolves the issue. There are instructions on how to do this for most automobiles by searching YouTube or reading the owner's manual.

It is possible to replace the metal clips that hold the coin battery in place. If they loose tension it could prevent the coin battery from being seated properly and result in the malfunction of your remote.

In rare instances, the fob can become out of the vehicle's sync because due to hardware or software issues. This issue can be fixed by visiting your local auto-locksmith or dealer to reprogram your key fob. In certain instances they might need to reinstall the software in your body control module as well.

Interference

In addition to a dead coin battery The key fob might not be able to transmit or receive an signal due to interference. This could occur if the keyfob is in close proximity to a radio transmitter, like a cell phone or radar detector. Other reasons the key fob may not function could be due to a weak connection to the buttons and internal chip, or water damage.

If your key fob suddenly stopped working, or you have tried everything at home to fix it (e.g. replacing batteries, reprogramming or using the spare key fob, you might have a faulty receiver module on your 500. The receiver module, which is located under the dashboard, is able to pick up radio frequency signals from your key fob. It converts them into electronic commands that the vehicle interprets.

Luckily, there is an easy method of resetting all of the on-board systems in your 500 and include the key fob. Disconnect the battery 12 volt for approximately 15 minutes by taking off the negative cable first then the positive cable. Reconnect the battery. This will erase any remaining electric current, and also restart the car's computer. This will help you get your key fob working again. If the problem persists you should seek out a certified technician. They will be able diagnose the exact cause of any issues.