Reasons Your Fiat 500 Key Fob Won't Work

A key fob for the Fiat 500 makes it simple to open doors and start your 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, or interference.

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Dead Coin Battery

A dead battery is probably the most common reason for your 500 key fob not working. Modern key fobs only have a limited range of operation and must be within just a few inches of the vehicle in order to work. If you're far away from your vehicle and 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 If this happens, replace the battery in the coin-cell (Part Number CR2032) by a new one of a reliable brand, like Panasonic Duracell or Energizer. You can find them in the local hardware store or online.

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

If your key fob doesn't work even after replacing the battery, there may be water damage that is preventing it from interacting with the module in your vehicle. Water damage can occur in many ways, including the simple splash or submerging your key fob in saltwater at the beach. If you suspect your fob was exposed to water, you can try placing it in a dry rice bag to pull the moisture out. If that doesn't work your fob may need to be reprogrammed by a professional locksmith or dealer.

Water Damage

The fob does have rubber seals to keep water out of the chip's electronic circuit, submerging it in the ocean or washing it in a machine can cause water damage. Saltwater is particularly dangerous to the circuit board of the fob which causes it to short out and eventually die. If you get the fob wet, it's not a good idea however, if you drop it into a glass of water or fail to remove it from your pocket before you run the washer and you don't have a chance, don't give in.

First remove the battery from the fob. Before replacing the battery clean the electronic chip with isopropyl or a similar product. Test the fob afterward to check if it's working. If the key still doesn't function, it may need to be programmed again. This is usually done by an auto locksmith or dealer.

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

Receiver Module Issues

The 500 key fob could be inoperable because it's out of range. The remote usually has an area of 30 feet or less, and if it's too far from your vehicle, it won't respond to your commands. This can be fixed by moving it closer to your vehicle until it starts responding.

If you've replaced your coin battery (commonly known as a "button" or "watch") and your fob still won't work it could be due to an internal circuit board problem. In the majority of cases, reprogramming your fob will resolve this problem. You can find the instructions on how to get fiat key code to do this for all vehicles by searching YouTube or looking through the owner's manual.

It is possible to replace the metal clips that hold the coin batteries in the correct position. If they loose tension, it may prevent your battery from being properly seated, causing your remote to malfunction.

In rare instances, the fob may become desync'd with your vehicle because of software or hardware issues. This can be a major headache, but you can often fix this by visiting a local dealer or auto locksmith to have them reprogram your fob for you. In some instances, they may need to install the software again in your body control module as well.

Interference

Interference can also cause the key fob to not be able to receive or transmit a signal. This may happen if the keyfob is located in close proximity to a radio transmitter, such as a cell phone or radar detector. Other reasons why the key fob might not work could be due to a weak connection to the buttons, damage to the internal chip or water damage.

If the key fob been unable to function for a while out of the blue and you've tried everything you can do 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, located beneath the dashboard, receives radio frequency signals from your key fob. It converts the signals into electronic commands which are then read 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, then the positive cable. Reconnect the battery. This will eliminate any remaining electricity and restart the car's computer system, which can help you get your key fob working again. If the issue continues, you should speak with an expert technician. They'll be able to diagnose the exact cause of your problems.