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Reasons Your Fiat 500 Key Fob Won't Work

A key fob for the Fiat 500 is a convenient way to open the doors and start the car. There are a myriad of reasons the fob won't work. This could be due to a dead coin-battery or water damage, problems with receiver modules, as well as interference.

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Dead Coin Battery

The most frequent reason that your 500 key fob will not work is a dead battery. Modern key fobs offer only a limited range of operation and must be within only a few inches from the vehicle in order to work. If you are far from your vehicle and you press the keyfob button it won't respond and display the message "Key Fob Not Detected".

If this happens you need to replace the battery of your coin-cell (Part Number CR2032) with a new battery from a reputable brand like Panasonic Duracell or Energizer. They can be found in your local hardware store, or on the internet.

After you've replaced the coin cell battery, you can test it by standing near your Fiat 500 and pressing the buttons. The car will flash its parking lights and the key fob should be able to operate the lock and unlock switches.

If the key fob won't work after replacing the battery, it might have water damage that stops it from connecting to the receiver module in your car. Water damage can happen in a number of ways, from an accidental splash to submerging your fob in salt water at the beach. If you believe your fob was exposed to water, place it in a rice bag to draw out the moisture. If this fails, you'll need to have the fob reprogrammed either by an auto locksmith or dealer.

Water Damage

The fob does have rubber seals that keep water from the chip's electronic circuit and out of the ocean or washing it in a machine could cause water damage. Saltwater can cause the circuit board to short and then fail. It's not a good idea to get the fob wet, but don't give it up when you accidentally drop it in water, or fail to remove it from your pocket.

First, remove the battery. Clean the electronic chip using isopropyl alcohol or a similar product and dry it completely before replacing the battery. Next try the fob and verify if it is working. If the fob doesn't work, it might need to be changed. This is usually done by an auto locksmith or dealer.

If the key is a newer model and has not been programmed to your car, it will likely need to be replaced completely. This is an easy process that can be carried out by a professional locksmith for automotive use. The locksmith will need the key to be cut to match your vehicle's ignition. The locksmith also needs to program your fob into the vehicle's system. It's a simple and inexpensive process that can usually be completed the same day.

Receiver Module Issues

Your 500 key fob might stop working because it is out of range. The remote usually has 30 feet of range or less and if it's far from your vehicle, it won't respond to your commands. You can solve this issue by moving the remote closer to your car until it responds.

If your fob isn't working after replacing the battery for the coin, 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 will fix the problem. You can find the procedure for the majority of vehicles on YouTube or in the owner's guide.

You may have to replace the metal retaining clips that hold the battery of your coin in place. If they become loose, it could prevent your coin battery from sitting properly, causing your remote to malfunction.

In rare cases the fob could be disconnected from your vehicle due to software issues or hardware issues. This can be a major issue, but you are able to usually resolve this issue by visiting an auto locksmith to have them reprogram your fob. In some instances they might need to install the software again in your body control module, too.

Interference

In addition to a dead battery on a coin, the key fob may not be able to receive or transmit the signal due to interference. This can occur when the keyfob's location is in close proximity to a radio transmitter, like a cell phone or radar detector. The key fob might not work because of a weak connection to the buttons, water damage or damage to the internal chips.

If the key fob has suddenly stopped working, in the middle of the night or after trying everything you can at home to fix it e.g. replacing the battery, reprogramming it and using the spare key fob, you could have a malfunctioning receiver module on your 500. The receiver module, which is located beneath the dashboard, picks up radio frequency signals from your key fob. It transforms the signals into electronic commands which are then read by the vehicle.

Luckily, fiat panda Key programming there is an easy method to reset all of the onboard systems in your 500 keys, including the key fob. Disconnect the battery 12 volt for approximately 15 minutes by removing the negative cable first then the positive cable. Then, reconnect the battery. This will clear out any residual electricity and restart the car's computers. This can help you get your key fob working again. If the problem persists, you should consult an expert certified technician. They will be able to identify the root cause of your problems.