Reasons Your Fiat 500 Key Fob Won't Work

A key fob from Fiat 500 makes it easy to open doors and start your car. There are a variety of reasons why the fob may stop working. This includes a dead battery, 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 that isn't working. Modern key fobs have only a limited range of operation and must be within only a few inches from the vehicle to work. If you are far from your vehicle when 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 you need to replace the battery of your coin-cell (Part Number CR2032) by a brand new one of a reputable brand like Panasonic Duracell or Energizer. You can typically find them at your local hardware store, or online.

After you've replaced the battery of your coin cell You can test it by standing in front of your Fiat 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 remote doesn't function after replacing the battery, it could be damaged by water that blocks it from communicating with the receiver module in your car. Water damage can occur in a variety of ways, ranging from a light splash to submerging the fob in salt water at the beach. If you believe your fob was exposed to water, put it in a rice bag to draw out the moisture. If this fails, you'll require your fob to be replaced by an auto locksmith or dealer.

Water Damage

Water damage can happen if you immerse the fob into the ocean or wash it in a washing machine. Saltwater can cause the circuit board to short and then end up dying. In the event that you let your fob get wet, it's not an option however, if you drop it in an empty cup of water, or do not remember to remove it from your pants pocket prior to running the washing machine, don't give up hope.

Remove the battery first. Before replacing the battery, clean the electronic chip with isopropyl or another similar product. Test the fob afterward to verify if it's functioning. If the fob doesn't work it could need to be programmed again. This is usually done by an auto locksmith or dealer.

If your key is old and is not programmed for your car, you will need to replace it completely. This is an easy process that can be carried out by a professional locksmith for automotive use. The locksmith will need the key cut to match the car's ignition. They will also need to reprogram the fob for the system of your car. This is a fast and inexpensive process which can be completed the same day.

Receiver Module Issues

One of the main reasons why your 500 key fob might stop functioning is because it's out of range. The remote has a range of 30 feet. So should you be too far from your car it won't respond to your commands. It can be solved by moving closer to your vehicle until it starts responding.

If you've replaced the battery on your coin (commonly known as"button" or "button" or "watch") and the fob isn't working it could be due to an internal circuit board issue. Reprogramming the fob is usually the solution to this issue. You can find the instructions for most vehicles on YouTube or in the owner's manual.

It is possible to replace the metal retaining clips that hold the coin battery. If they lose tension it may prevent your battery from sitting properly, causing your remote to malfunction.

In rare instances, the fob could be out of connection with your vehicle as a result of software or hardware problems. 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. In certain situations they may have to reinstall the program in your body control module, as well.

Interference

Interference can also cause the key fob not to receive or transmit signals. This could occur if the key fob is near an electronic radio transmitter (cell phones or radar detectors) or another source of electromagnetic radiation. Other reasons why the key fob could 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 have tried everything at home to fix it (e.g. You could have a malfunctioning 500 receiver module if you've tried replacing the battery, reprogramming or using a spare key fob. The receiver module is situated under the dash, and it picks up the radio frequency signals from the key fob. It converts them to electronic commands that the vehicle interprets.

Fortunately, there's an easy method to reset all of the on-board systems in your 500 and include the key fob. Disconnect the battery 12 volt for approximately 15 minutes by disconnecting the negative cable first then the positive cable. Reconnect the battery. This will erase any remaining electrical charge, and then restart the car's computer. This will help you get your key fob to work again. If the problem persists you should speak with an experienced technician. They will be able diagnose the exact cause of any problems.