Citroen C4 Key Fob Replacement
The Citroen C4 Picasso is a small family car/compact SUV with several truly innovative features. It has decent space for five people, and it's an ideal vehicle to travel around the city.
Sometimes, a key fob stops functioning due to pairing issues. This issue can be fixed if instructions are followed properly. However, a professional with the right equipment is required to fix certain types of vehicles.
Dead coin battery

The most common problem with remote key fobs is the battery being dead. However, it is a simple solution. You just need to replace the battery that is coin-sized. These batteries are available at your local auto store and resemble small silver coins. After replacing the battery, your vehicle will be able to open and lock.
Another reason your key fob won't work is because of interference. This can be caused by various factors, including weather conditions, objects or other transmitters on the same frequency. If this happens it could be necessary for you to remove the ignition key and try again.
Another reason your key fob may not function could be that the fob has been deprogrammed. This can happen when the key is exposed to water, or if it is not properly removed after replacing the battery. Usually, you can fix the car's programming by following the guidelines provided in the owner's manual. If you cannot do it, you can ask an expert locksmith or dealer to do it for you.
Water damage
The Citroen C4 is a highly reliable car, however it's an automobile with a lot of interconnected components. Like all cars it can suffer a breakdown from time to time. In certain instances, the issue can be fixed easily. In other cases it is possible to see a mechanic or contact a professional for assistance. The most frequent reasons for the C4 key fob not functioning are a dead coin battery, water damage, signal interference and receiver module problems.
Moisture or sweat on the circuit board of the key fob might cause water damage to the circuit board of the key fob. The circuit can be damaged which can result in the key fob becoming dead or causing battery drain. To prevent this from happening, make sure to keep your key fob away from water or put it in a plastic bag before you use it.
You can also test the battery's voltage using an instrument. A successful test will show values between 12 and 13. If your battery doesn't produce these values, then it could be defective. This means you'll require replacing the battery.
The receiver module is not working properly.
A defective receiver module could cause the key fob to stop functioning. Citroen owners often experience this issue, since the keyfob must send an indication to the door handle in order to unlock and start the car. The key fob will not function if it is unable to send the signal. It has to be replaced. This is usually handled by a technician or a dealer.
Citroen C4 keys can malfunction due to a variety reasons. These include a dead coin battery, water damage, signal interference or a defective electronic chip. To begin troubleshooting, test the key fob batteries and look for obvious indications. G28CarKeys can be done by opening the key fob, then removing the battery to gain a better view.
Replace the battery if exhausted. Make sure the new one has the same size, voltage, and specification. Also, make sure that the fob is properly joined before replacing it.
The battery is defective at 12 volts.
A majority of modern cars have key fobs which allow you to lock or unlock the vehicle remotely. These devices send an electrical signal to the vehicle that controls the locks. They are powered by batteries. However, batteries can fail over time. The good news is that the replacement battery is affordable and simple to install. You can use a flat-blade screwdriver to break the fob or your owner's manual may contain instructions on how to do it.
Replace the battery with a new one that is the same type and size as the original. Different batteries can have different voltages, which could cause your device to stop functioning or display a low-battery alert. Be sure to position the battery in that the positive and negative indicators are aligned with the original orientation. This ensures that the chip is receiving the right signals. The problem could also be due to a malfunctioning module. In this scenario you should consult your dealer for further diagnostics and repairs.
Unpaired keys that need the reprogramming
Car key remotes may cease to function due to a variety of reasons. Fortunately, most of these problems are fixable quickly and easily. Most of the time it is a dead battery that is the reason. This can be replaced in a couple of minutes at most auto part shops. It's important that the new battery be installed correctly. Metal retaining clips need to be properly tightened and contacts of the battery must be cleaned.
Another possibility is a faulty receiver module or signal interference. If the key fob does not receive a strong signal from the receiver, it may not be able to unlock or lock the doors as well as start the vehicle or operate the hands-free system. In these cases, you should try to reset the receiver by disconnecting the battery for a few minutes.
Smart keys, which have an integrated security chip that disarms the vehicle's standard immobiliser, are more expensive than traditional keys made of metal and can cost upwards of $500 to replace. To avoid these high costs, it's a good idea to have at minimum two working keys for your C4. This key fob replacement for the remote is rebuilt and tested with brand new internal components before being shipped to you.