Citroen C3 Key Fob Replacement
If your C3 key fob suddenly stopped functioning, it could be because of malfunctioning components. If the key fob is still functional, the issue could be due to something else, like water damage or a dead coin battery.
The eC3 is aiming at the mass market and hence Citroen has been working to make the service accessible to customers. It has many features like virtual remote diagnosis and an app specifically designed for customer service.
Dead coin battery
If the key fob's unlock function isn't working, it could be a problem with the coin battery. The battery should last between three and four years with regular use, but it can die in a sudden manner. Luckily, car makers include fail-safes in their products so that you are able to start and lock your car even if the key fob has a dead battery.
The battery inside the key fob is held in place by clips made of metal that form the circuit. If these are worn or dirty, the battery might not be able to receive the power. The battery should be the right size and type. The battery won't fit in the fob if it's too large or small.
Key fob batteries are sold under a variety of names such as CR2016, and even CR2032. They cannot be interchanged. The best way to know which type to purchase is to refer to the owner's manual or look at the fob to find a sticker with a label that gives you the specific information.
When you've got the proper battery, it can be replaced in a matter minutes. Most fobs have the option of a slider, switch, or a gap that can be used to pry the cover open to replace the old battery. Make sure the new battery has the same voltage as the previous one and that it is inserted correctly.
Water damage
Water can be harmful to electronics even if they've survived an wash cycle or dip. It can cause damage to the chip and destroy a battery. There are, however, some actions you can take to limit the damage.
First, you must get rid of the battery and dry out the interior and circuit board as much as you can. You can also clean the battery by using a cotton swab, which has been dipped in 90 percent alcohol.
After you've cleaned your key fob, you should wait a few days for it to completely dry out. You can speed the process up by placing it high on a shelf so it will not be disturbed. Once you're sure it's bone dry, try putting in a brand new battery and use it in the same way as you normally would.
If the key fob does not work, you might have a faulty receiver module that cannot transmit signals to your vehicle. It can be costly to repair, but it's worth trying to avoid the expense of a replacement.
The most straightforward way to fix an faulty key fob is to replace the battery. The radio signal will be restored and your key fob will work again after changing the battery. If the issue persists you should seek professional help.
Faulty receiver module
In some instances there may be a problem with the receiver module of the key fob could stop it from receiving or transmitting the right signals. If this is the situation, your car will not recognize your remote control key and will not allow you to unlock or start the engine. In this instance, you'll need to get an alternative.
Check out the owner's guide prior to trying to modify the key fob by yourself. Make sure that the battery of the key fob is in good working order and that the buttons are working. Close the doors and remove any aftermarket devices such as radios or alarms from the vehicle.
You could also try cleaning the chip using isopropyl alcohol, or an electronic cleaner. If the chip has become damaged, it will probably need to be replaced.
After cleaning the key fobs, remove the circuit board. Clean the contacts with alcohol swabs. Let them dry. Once the contacts are dry then you can reassemble and test the key fob. If it's not working it may be necessary to replace the battery. Choose a new battery that has the same voltage level as the previous battery. It is also a good idea to check that the battery is placed in the correct position and that the contact points are very sensitive.
A malfunctioning keyless entry system
It can be very frustrating when the key fob stops functioning. The positive side is that most times, it's easy to get it back in operation. The most common cause of a malfunctioning key fob is a dead battery for the coin which is easily replaced in a matter of minutes. Other causes are signal interference or a malfunctioning module and other electrical issues.
The first step is to make sure that the battery is correctly installed and has the correct voltage. The correct battery type is also vital. The internal circuitry of the device may be damaged if you use a battery that is not the correct size or is not polarized. The Keylab can also check the fuses to ensure they're not blowing or have not been melted.
Another possibility is that the transponder contained in the key could have been damaged or lost. This is a scenario that will require further diagnostics by a dealer in the car or professional mechanic.
Many auto locksmiths and dealerships can reprogram the fob of your car's keys for a fee, but this can be expensive. It could be worthwhile to reprogram your spare fob, if you have one. In most cases, you'll find the instructions in your owner's guide. If you don't own the manual, you can locate instructions on the internet or on YouTube. Before you attempt to fix the key fob, it is important that you consult the owner's guide.