Reasons Your Fiat 500 Key Fob Won't Work

A key fob with the fiat 500 number is a convenient method to unlock the doors and get started the car. However, there are numerous reasons why the key fob might stop functioning. This could be due to a dead coin-battery or water damage, issues with the receiver module, and interference.

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Dead Coin Battery

The most frequent reason why your 500 key fob won't work is the battery is dead. Modern key fobs come with a limited range of operation, and should be within only a few feet from the vehicle in order to function. If you are not within your vehicle and you hit the keyfob, it won't respond and display the message "Key Fob Not Detected".

If this happens, simply replace the battery in the coin cell (Part number CR2032) with a fresh one from a reputable manufacturer such as Panasonic, Duracell, or Energizer. They are usually available in your 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 car should flash its parking lights and the key fob will operate the lock and unlock switches.

If the fob's key doesn't function after replacing the battery, it might be damaged by water that blocks it from communicating with the receiver module inside your car. Water damage can happen in a number of ways, 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 need to have the fob changed by an auto locksmith or dealer.

Water Damage

Water damage can occur when you immerse the fob into the ocean or wash it in a washing machine. Saltwater poses a particular risk to the circuit board of the fob and can cause it to short out and eventually die. It's not a good thing to let the fob get wet, but don't give it up when you accidentally drop it in water or forget to remove it from your pants pocket.

Remove the battery first. Clean the electronic chip using isopropyl alcohol or a similar product and then dry it completely before replacing the battery. Then try the fob and see if it works. If the fob doesn't work, it may have to be reset. This is typically handled by a professional or dealer auto locksmith.

If your key is a bit older and not programmed for your vehicle then you'll need to replace it completely. A professional automotive locksmith can do this job. The locksmith must cut the key to match the ignition of your vehicle. They'll also need to program the fob into the car's system. This is a simple and inexpensive process that can be completed within the same day.

Receiver Module Issues

Your 500 key fob might stop working because it is out of range. The remote usually has an area of 30 feet or less and if it's far away from your car it won't respond to your commands. It is possible to fix this by moving the remote closer to your car until it responds.

If you've replaced your coin battery (commonly called a "button" or "watch") and the fob won't work it could be due to an internal circuit board problem. Reprogramming the fob is usually the solution to this problem. You can find directions on how to do this for all automobiles by searching YouTube or checking out the owner's manual.

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 can become out of connection with your vehicle as a result of hardware or software issues. This could cause a significant issue, but you are able to usually fix it by visiting an auto locksmith to have them reprogram your fob. In some cases it may be necessary to reinstall the program in your body control module, too.

Interference

Interference can also cause the key fob not to receive or transmit the signal. This could happen if the key fob is near an electronic radio transmitter (cell phones or radar detectors) or another source of electromagnetic radiation. The key fob might not function due to a poor connection to the buttons or water damage, or damage to the internal chips.

If the key fob stopped working one day suddenly or after trying every option at home to solve it e.g. It could be a defective 500 receiver module in the event that you've tried replacing the battery, reprogramming, and using an alternative key fob. The receiver module is situated under the dash and is able to pick up the radio frequency signals from the key fob. It transforms the signals into electronic commands that are then interpreted by the vehicle.

There's a simple method to reset the 500's internal system including the keyfob. Disconnect the 12 volt battery for about 15 minutes by disconnecting the negative cable first then the positive cable. Reconnect the battery. This will eliminate any remaining electricity, and restart the computer of your car. This can help get your key fob to work again. If the problem persists you should seek out an expert technician. They can identify the exact cause of problems.