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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 start the car. However, there are many reasons why the fob may stop working. This could be due to a dead coin battery or damage to the receiver module, issues, or interference.
This listing is for a NEW replacement Fiat Flip Key Remote that appears similar to the Ilco brand. It has to be professionally programmed (click here to search for local automotive locksmiths). It includes lock, unlock and trunk buttons.
Dead Coin Battery
A dead battery is the most frequent cause of your 500 key fob not functioning. Modern key fobs offer limited operating range and must be within only a few inches from the vehicle in order to function. If you're far from your vehicle and press the key fob button the car won't be able to respond, and will display the "Key Fob Not Detected" message in the instrument cluster.
If this happens you need to replace the battery of your coin-cell (Part Number CR2032) with a new battery of a trusted brand such as Panasonic Duracell or Energizer. They are available at your local hardware store, or online.
After you've changed the battery on the coin cell, you can test it by standing close to your Fiat 500 and pressing the buttons. The parking lights should light up and the key fob should operate the lock and unlock switches.
If your key fob isn't working after replacing the battery, it might be water damage that hinders it from interacting with the module in your vehicle. Water damage can occur through a variety of methods, including an easy splash or submerging the key fob saltwater at the beach. If you think your fob was exposed to water, put it in a bag of rice to draw out the moisture. If this doesn't work, your fob may need to be reset by a professional auto locksmith or by the 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 become shorted and eventually fail. If you get the fob wet, it's not a good idea but if you accidentally drop it in a cup of water or do not remember to take it out of your pants pocket prior to running the washing machine do not give up hope.
Take the battery off first. Clean the electronic chip with isopropyl alcohol or another similar product and then dry it completely before replacing the battery. Then try the fob and test if it works. If the fob doesn't work, it may need to be programmed again. This is usually done by an auto locksmith or dealer.
If the key is a newer model and has not been programmed to your vehicle, it will likely need to be replaced completely. A professional locksmith for cars will be able to complete this process. The locksmith needs to cut the key to match the ignition in your vehicle. They'll also have to program the fob into your car's system. This is a simple and inexpensive process that can be completed on the same day.
Receiver Module Issues
One of the most common reasons your 500 key fob might stop functioning is because it's out of range. The remote typically has a range of 30 feet or less, and if it's too far from your car, it will not respond to your commands. It's easy to solve this problem by moving the remote closer to your vehicle until it responds.
If your fob doesn't work after replacing the battery in the coin, also known as a "button", "watch" or "button", it could be due to an issue with the internal circuit board. In the majority of cases, reprogramming your fob will fix the problem. You can find the procedure for most vehicles on YouTube or in the owner's manual.
It is possible to replace the metal clips that hold the battery of your coin in place. If they lose tension, it could hinder the coin battery from sitting properly and can cause the remote to malfunction.
In rare instances the fob might become disconnected from your vehicle because of software or hardware issues. This could cause a significant problem, but you can frequently fix this issue by visiting an auto locksmith to reprogram your fob. In some instances they might need to reinstall the software in your body control module as well.
In addition to a dead coin battery The key fob might not be receiving or transmitting signals due to interference. This is possible when the key fob is in proximity to the radio transmitter (cell phones, radar detectors) or any other source of electromagnetic radiation. The key fob may not work because of a problem to the buttons water damage or damage to the internal chips.
If your key fob suddenly stopped working, or you've tried everything at home to resolve it (e.g. replacing the battery, reprogramming it and using the spare key fob, it could have a damaged receiver module on your 500. The receiver module is situated under the dash and picks up the radio frequency signals from the key fob. It converts them to electronic commands that the vehicle interprets.
Luckily, there is an easy way to reset every single system on board in your 500, including the key fob. Disconnect the battery for 15 minutes, removing first the negative cable and then the positive cable. Then, reconnect the battery. This will erase any remaining electric current, and also restart the computer in your car. This could help you get your key fob to function again. If the problem persists, you should consult a certified technician. They'll be able determine the exact cause of your issues.