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The Citroen C4 Picasso, a compact SUV/small family car, has some truly innovative features. It's spacious enough to accommodate five people and it's an excellent vehicle for getting around the city.

Sometimes the key fob ceases functioning due to pairing issues. If you follow the directions properly, this issue can be easily fixed. For certain vehicles, a professional will be required to use specialized tools.

Dead coin battery

A dead battery is the most frequent issue that affects remote key fobs. However, it's an easy fix. All you need to do is replace the battery on your coin. These batteries can be found at the local auto store and look like small silver coins. Once you have replaced the battery, you should be secure enough to lock and unlock your vehicle.

Interference is another reason that your key fob's device may not work. This can occur due to many reasons, including weather conditions, objects or other transmitters on the same frequency. If this occurs it is possible to take off the ignition key and try again.

The deprogramming of your key fob may also be the cause for the key's inability to function. This could occur in the event that the key was exposed to water, or the battery is not removed correctly after the key is replaced. Typically, you can repair the programming of your car by following the directions in the owner's guide. If you're unable to do this, you can visit a locksmith shop or a professional to do it for you.

Water damage

The Citroen C4 is a highly reliable vehicle, but it's a machine with hundreds of interconnected parts. It's not uncommon for a C4 from citroen ds3 car key to have a breakdown. In some cases, the issue can be easily fixed. In other cases you might need to contact assistance or see a mechanic. The most frequent causes of the C4 key fob not working is a dead coin battery water damage, signal interference and receiver module malfunctions.

The moisture or sweat that accumulates on the circuit board of the key fob may cause water damage to the circuit board of the key fob. The circuit could be prone to short, leading to a battery drain or dead key fob. To avoid this happening, try to keep your key fob out from water or put it in a bag before you use it.

You can also check the voltage of your battery by using a multimeter. A successful test will give values between 12 and 13. If your battery doesn't produce these numbers, it may be defective. This means you'll have to replace the battery.

Faulty receiver module

A defective receiver can cause the key fob to stop working. This is a common issue for Citroen owners, as the key fob needs to send a signal to the door handle to unlock and begin the car. If the key fob fails to send this signal, it will not function and will need to be replaced. This is usually done at a vehicle dealership or by an expert mechanic.

Citroen C4 keys can malfunction for a variety of reasons. This can be a dead coin-cell battery or damage from water or signal interference. To begin troubleshooting, test the key fob batteries and check for obvious signs. This can be done by taking the keyfob apart and removing its battery to get a better view.

Replace the battery if empty. Be sure the new battery has the same voltage, size and specifications. Also, make sure the fob is securely joined before replacing it.

A faulty 12 volt battery

A majority of modern cars come with key fobs that let you to lock and unlock your vehicle from the distance. These devices transmit a signal to the vehicle that controls the locks. They are powered by batteries. However, the batteries can fail over time. The good thing is that the replacement battery is cheap and easy to replace. It is possible to pry the fob out using a flat-bladed screwdriver, or you can find the instructions in your owner's guide.

Replace the battery with one of the same size and type as the original. Different types of batteries have different voltages, which can cause the fob to stop functioning or display a low battery warning. Remember to also orient the battery so that the plus and minus indicators coincide with the orientation of the original. This will ensure that the chip is receiving the right signals. The issue could be caused by a faulty receiver module. In this case you should call your dealer for further diagnostics and repairs.

Unpaired keys require changing the program

The car key remote can fail to function due to various reasons. Most of these issues are easily and quickly fixed. Most often an inoperable coin-cell battery is the reason. This can be replaced in a couple of moments at most auto parts shops. It is important that the new battery be installed correctly. Metal retaining clips should be tightened properly and the contacts of the battery should be cleaned.

Another possibility is that of a damaged receiver module or signal interference. If the key fob is unable to receive a clear signal from the receiver it could not unlock or lock the doors either, start the vehicle or operate the hands free system. In such cases you can reset the receiver by disconnection of the battery for a couple of minutes.

Smart keys, that have an integrated security chip that disarms the car's standard immobiliser system is more expensive than traditional keys made of metal and can cost up to $500 to replace. To avoid these high costs it's recommended to have at least two keys that work for your C4. This replacement remote key fob is cleaned and refurbished with new internal components and is tested before sending to you.