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Key fobs from Citroen can stop working due to a variety of causes. They can be due to worn buttons, poor contact with the battery, water damage and receiver module problems. Check the 12 volt batteries.

If the key fob can not unlock your car, you might be experiencing deprogramming. This occurs when certain button combinations send an email to the onboard computer requesting that the key be removed from its list of keys.

Dead coin battery

If the key fob on your Citroen C3 is no longer functioning, first check if the battery has died. The batteries inside the fobs are small, round coins that can be easily replaced in a matter of minutes. They are sold in general stores, home improvement stores and auto parts stores. Be sure to purchase the right type. Fobs usually require CR2025 or CR2032, but you should consult your owner's manual to determine the exact type of battery your vehicle requires.

Take off the button pad and then use cotton swabs or alcohol to clean it. These will help remove corrosion and clean the contacts which are typically colored gold. Once the contacts have been cleaned and sanitized, you can then insert the new battery. Be citroen c4 car keys not to mix the two batteries because they have different diameters and voltages.

The next step is to check the voltage of the battery. A multimeter set to the battery's voltage range should provide you with a precise reading. If the battery's current value is higher or lower than the threshold, it should be replaced. You may also be able to start your car using a spare key. However, this might not always work. If the problem continues, go to a CITROEN dealership with your V5 registration as well as personal identification documents. A CITROEN Dealer can locate the code for the immobiliser on your vehicle and purchase an upgrade to your battery.

Water damage

When the key fob gets submerged, it could lose its signal to the car. It is advised to remove it as fast as you can out of the pool or puddle. Once you have done that dry the circuit board in the best way you can using an abrasive swab of cotton that's been soaked in isopropyl alcohol or electronic cleaner. If it still doesn't work it could be the time to replace your key fob.

Another reason that is commonly cited the most common reason for Citroen remote control c3 not working is signal interference. It can happen when there is an electrical signal near the vehicle or other transmitters operating on the same frequency. Once you leave the area of interference the key fob will begin working again.

The Citroen C3 key fob can cease to function due to worn buttons signals, signal interference issues receiver module issues or a dead 12-volt battery or a damaged chip. You'll have to get it reset if this happens. This can be done either by a certified mechanic or an Citroen dealer. If the issue is significant then you'll have to get it replaced. It's a simple and cost-effective fix, however it's crucial to act fast. The longer you delay to fix the issue, the more serious it will get. It can be dangerous to you and your passengers If the issue isn't solved.

Receiver module issue


If your key fob is not functioning the receiver module could have developed an issue. Water damage is among the many causes. This could happen if you accidentally drop your keys or wash them. You can try to fix the problem by taking off the chip and cleaning it with isopropyl or electronic cleaner. This will prevent the chip from corrosion.

You can reset the receiver module if you disconnect it from the battery for 10 seconds. Then reconnect the battery to the vehicle and repeat the process. If this does not resolve the issue, take it to a dealer to have it replaced.

Another reason why your key might stop working is due interference. It could be caused due to other transmitters that use the same frequency as your key fob or by objects in your vehicle. If you are unable fix the issue, bring your key fob to a dealer and have it reprogrammed.

The key fob contains a short-range radio transmitter/radio-frequency identification (RFID) chip and antenna, which sends a distinct coded signal to the receiver module in your car. If the signal is not accurate it will not recognize the car key and display a message stating "key not recognized". This can be a gruelling issue, especially if you're trying to start your vehicle.

Dead 12 volt battery

It is possible that your key fob may have been damaged if it ceases to function after the change of batteries. This is especially common when the key fob is dropped or stepped on, but it can also happen following servicing on your car that requires removal and reinstallation of the panels. Wires are exposed when the panels are removed. If your fob is damaged, you may have to replace it completely.

Another possibility is that the remote may be receiving interference from other devices or locations. This can cause RF signals to weaken and block the car from recognizing the remote. It is possible to reset the onboard computer in this scenario by disconnecting your 12-volt battery for 15 minutes. This will erase any remaining electric current, allowing your system to reboot.

Before replacing the battery it is essential to ensure it's of the correct type and size. If the replacement battery isn't big enough or has a different voltage, it can damage the circuit board in the key fob. Before installing a battery you must clean the chip inside the fob to eliminate any contaminants that could cause corrosion. The correct type of battery can ensure that the key fob is sealed and protected against moisture. Once the key fob's been reinstalled, it will function normally. It is possible to use the second key in the event that your vehicle displays a message that reads "key not detected." You may need to press the button a few times before it responds.