Reasons Your Fiat 500 Key Fob Won't Work

A key fob for the Fiat 500 is a convenient method to unlock the doors and get started the car. There are many reasons why the fob won't work. It could be due to a dead battery damage to the receiver module, problems, and interference.

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Dead Coin Battery

A dead battery is probably the most common cause of your 500 key fob that isn't working. Modern key fobs operate with a limited operating range, and should be within just a few feet of the car to operate. If you're far away from your vehicle when you press the key fob button, the car will not respond, and will display the "Key Fob Not Detected" message in the instrument cluster.

If this happens, simply replace the battery of your coin cell (Part number CR2032) with a fresh one from a reputable manufacturer like Panasonic, Duracell, or Energizer. You can usually find them at your local hardware store or on the internet.

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

If the key fob won't work after replacing the battery, it may be damaged by water, which prevents it from connecting to the receiver module inside your car. Water damage can occur through a variety of methods, including the simple splash or submerging the key fob in saltwater at the beach. If you suspect that your fob has been exposed to water, put it in a dry rice bag to draw the moisture back out. If this isn't working, you'll need to have your fob reprogrammed either by an auto locksmith or a dealer.

Water Damage

While the fob comes with rubber seals to keep water from the chip's electronic circuit, submerging it in the ocean or washing it in a machine could cause water damage. 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 ideal idea but if you drop it into the water in a cup or don't remember to take it out of 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 using isopropyl or similar products. Next try the fob and check if it functions. If the fob doesn't work, it might need to be programmed again. This is usually handled by an auto locksmith or dealer.

If your key is a bit older and is not programmed for your car then you'll need to replace it completely. A professional locksmith for cars can do this job. The locksmith will require the key to be cut to match your car's ignition. The locksmith also needs to reprogram your fob in the car's system. This is an affordable and quick process that could be completed the same day.

Receiver Module Issues

The 500 key fob could be inoperable because it's out of range. The remote's range is of 30 feet, so in the event that you are far from your vehicle it will not respond to your commands. It's easy to solve this issue by moving the remote closer to your car until it responds.

If your fob won't work after replacing the coin battery, also called a "button", "watch" or "button" It could be a problem with the internal circuit board. In the majority of cases, reprogramming your fob can resolve the issue. The instructions are available for the majority of vehicles on YouTube or in the owner's manual.

It could be necessary to replace the metal clips that hold the coin batteries in place. If they lose tension it could prevent your coin battery from being properly seated and cause your remote to malfunction.

In rare instances, the fob might be out of alignment with your vehicle because due to hardware or software issues. This can cause a major headache, but you can usually resolve this issue by visiting an auto locksmith to reprogram your fob for you. In some cases, the software may also require reinstallation to your body control modules.

Interference

In addition to a dead battery on a coin The key fob may not be able to receive or transmit signals due to interference. This could occur if the key fob is located near a radio transmitter (cell phones or radar detectors) or another source of electromagnetic radiation. Other reasons why the key fob might not function include a poor connection to the buttons or damage to the internal chip, or water damage.

If the key fob suddenly stopped working, in the middle of the night or even after trying everything you can do at home to resolve it e.g. replacing batteries, reprogramming or using the spare key fob, you might have a defective receiver module on your 500. The receiver module is located under the dash and is able to pick up the radio frequency signals from the key fob. It converts the signals into electronic commands which are then processed by the vehicle.

Fortunately, there's an easy method of resetting all on-board systems in your 500, including the key fob. Disconnect the battery for 15 minutes by taking off first the negative cable and then the positive cable. Reconnect the battery. This will clear any residual electricity, and allow you to restart the computer in your car. This will help you get your key fob to work again. If the problem persists, you should consult an expert certified technician. They can determine the root of your problem.