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If your C3 key fob suddenly stopped functioning, it could be because of an issue with the module. If the key fob still operates it could be because of another issue, such as water damage or a dead battery.
Citroen aims to serve the market of mass appeal with its eC3. It offers several features including virtual remote diagnosis and an app specifically designed for customer service.
Dead coin battery
If the key fob's unlock button isn't working, there is an issue with the coin battery. Battery life should range between three and four year with regular use. However, it is possible for it to suddenly go out. The automakers have created fail-safes that let you lock and start your car even if your key fob is dead.
The battery inside the key fob is typically held in place by metallic clips that form the circuit. The battery might not be able to run if these clips are dirty or worn. The battery should also be the correct size and type. If the battery is too small or too large, it will not fit on the fob and won't function properly.
Key fob batteries are often sold under different names, including CR2016 and CR2032 (though they're not interchangeable). Read the owner's guide for your particular model or look for a sticker on the fob with the details.
Once you've found the correct battery and it's replaced, it's possible to replace it in a matter of seconds. Most fobs have a slider, gap, or switch that you can use to pry open the cover and swap out the old one for a new one. Make sure that the new battery is the same voltage and is inserted in the correct way.
Water damage
Even if your key fob survived the wash cycle or swimming in the pool, it isn't good for electronics. It can cause damage to a battery and cause serious damage to the electronic chip inside. Fortunately, there are a few options to limit the damage.
It is crucial to get rid of the battery and then dry out the interior and circuit board as much as is possible. You can also clean the battery by using a cotton swab, which is dipped in 90 percent alcohol.
After you've cleaned your key fob, wait a few days for it to completely dry out. You can speed the process by placing it on a shelf so that it isn't disturbed. Once you're sure that it's dry, try putting in a new battery and using it in the same way as you normally would.
If your key fob still not working, it could be that the receiver module in your car is defective and is unable to transmit signals. It's expensive to fix, but it's definitely worth trying to avoid having to buy a new one.
The easiest method to fix a malfunctioning key fob is to change the battery. The radio signal will be restored and your key fob will work again after changing the battery. However, if the problem persists then you should seek out professional help.
The receiver module is not working properly.
In some cases the key fob's transmitter module could be defective that stops it from receiving and transmitting the proper signal. In this case, the car will not recognize the remote control key. It will not unlock or start. In this situation an alternative remote control is required.
Check out the owner's guide prior to trying to program the key fob yourself. First, ensure that the key fob's battery is in good health and that all of its buttons are functioning. Also, close the doors and remove any accessories like alarm systems or radios from the vehicle.
You can also clean the chip with isopropyl or electronic cleaner. If the chip is damaged it will likely need to be replaced.
After cleaning the key fob, remove the circuit board. Then, use alcohol swabs to clean the contacts and let them dry in the air. Once the contacts are dry then you can reassemble the key fob and test it. If the key fob isn't working, it could be required to replace the battery. Use a battery that has the same voltage level that the original battery. Check the battery's location, because the contact points are very sensitive.
Keyless entry system that isn't working properly
It can be very frustrating if the key fob stops working. The good news is that, most of the time it's a breeze to get it back in operation. A dead battery for the coin is the most common cause of a malfunctioning fob. It can be repaired in just a few minutes. Other reasons include signal interference, a bad receiver module, and other electrical problems.
The first step is to make sure that the battery is correctly fitted and has the correct voltage. It is also essential to select the right battery type. The internal circuitry of the device could be damaged if you use batteries that are not the correct size or the correct polarized. You should also examine the fuses to make sure they're not blowing or melted.
Another possible problem is that the transponder inside the key could have been damaged or even lost. This is a situation that will require further diagnosis by a dealer in the car or a professional mechanic.
Many auto locksmiths and dealerships can reprogram a car's key fob for a fee, however this can be expensive. It could be worthwhile to reprogram your spare fob if you own one. In the majority of cases, you will locate the steps in your owner's guide. If you don't have the manual, you can look up instructions online or on YouTube. Before you attempt to fix the key fob, it's vital to refer to the owner's guide.