Reasons Your Fiat 500 Key Fob Won't Work

A fiat 500 key fob is a great way to unlock the doors and get started the car. However, there are numerous reasons why the key fob might stop working. These include a dead coin battery damaged receiver module, water damage 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 only have limited operating range and must be within a few inches of the vehicle to work. If you are further away from your vehicle and hit the keyfob, it won't respond and display the message "Key Fob Not Detected".

If this occurs you need to replace the battery of your coin-cell (Part Number CR2032) with a new battery of a trusted brand such as Panasonic Duracell or Energizer. They are usually available at 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 and pressing the buttons. The parking lights should flash and the key fob will operate the lock and unlock switches.

If your fob's key isn't working even after replacing the battery, it may be water damage which prevents it from communicating with the module inside your vehicle. Water damage can occur in a variety of ways, ranging from an accidental splash to submerging the fob salt water at the beach. If you suspect that your fob was exposed to water, try putting it in a dry rice bag to draw the moisture out. If this fails, you'll need to have your fob reprogrammed either by an auto locksmith or dealer.

Water Damage

Although the fob is equipped with rubber seals to keep water out of the chip's electronic circuit and out of the ocean or washing it in a machine can cause water damage. Saltwater can cause the circuit board to become shorted and eventually cease to function. Getting the fob wet is not a good idea but if you accidentally drop it in the water in a cup or forget to remove it from your pants pocket prior to running the washer Don't give up hope.

First, remove the battery from the fob. Clean the electronic chip using isopropyl or a similar product and dry it thoroughly before replacing the battery. Test the fob afterward to see if it is functioning. If the key doesn't function, it may have to be changed. This is typically done by a dealer or professional auto locksmith.

If the key you have is older and has not been programmed for your vehicle then you'll need to replace it completely. A professional locksmith for cars can carry out this simple task. The locksmith will require the key to be cut to match your vehicle's ignition. The locksmith also needs to program your fob into the car's system. This is a low-cost and fast process that can be completed within the same day.

Receiver Module Issues

The 500 key fob you have may not function because it's out of range. The remote typically has an operating range of 30 feet or less, and if it's too far from your car, it won't respond to your commands. This can be easily fixed by moving closer to your vehicle until it begins responding.

If your fob doesn't work after replacing the coin battery, also known as a "button", "watch" or "button" It could be a problem with the circuit board inside. In the majority of cases, reprogramming your fob will fix the problem. There are instructions on how to do this for the majority of vehicles by searching YouTube or consulting the owner's manual.

You may have to replace the metal clips that hold the battery of your coin in place. 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 desync'd with your vehicle because of software or hardware issues. You can fix this problem by visiting your local auto-locksmith or dealer to reprogram your key fob. In certain instances the software might require reinstallation into your body control modules.

Interference

In addition to a dead coin battery, the key fob may not be able to receive or transmit an signal due to interference. This could happen if the key fob is near an electronic radio transmitter (cell phones and radar detectors) or any other source of electromagnetic radiation. The key fob could not work because of a weak connection with the buttons, water damage or damage to the internal chips.

If the key fob suddenly stopped working, suddenly, or after trying everything you can at home to resolve it e.g. replacing the battery, reprogramming, and using the spare key fob, you may have a defective receiver module on your 500. The receiver module, located beneath the dashboard, detects radio frequency signals from your key fob. It converts the signals into electronic commands, which are then processed by the vehicle.

There is a simple way to reset the 500's onboard system, including the keyfob. Disconnect the battery for 15 minutes by removing first the negative cable and then the positive cable. Reconnect the battery. This will erase any remaining electric current, and also restart the car's computer. This can help you get your key fob to function again. If the issue persists, you should consult an expert certified technician. They'll be able diagnose the exact cause of your issue.