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Citroen Berlingo Key Fob Troubleshooting
Citroen's Berlingo Multispace occupies a utilitarian segment in the people-carrier market. Its sliding doors at the rear allow it to easily squeeze into parking bays and its durable cabin is more resistant to crashing than the majority of upmarket competitors.
If your key fob was submerged in saltwater or soapy liquid, it may not work for a second time, even after a brand new battery and the reprogramming. This is because the internal chip has been damaged by exposure to water.
Water Damage
After rescuing your key fob from the puddle, pool or washing machine it was swimming in, clean it of the most water you can by shaking it. Place it on the ground with the button facing downwards and let it run off for a couple of minutes before wiping the inside using a soft cloth. This should stop any condensation from damaging the electronic chip.
If your Mk 2 Citroen Berlingo or Mk 3 Citroen Berlingo dashboard warning light, which appears like the symbol of a car key, lights up, it could be a fault with the immobilizer. This is a security device in the vehicle that blocks thieves from wiring hotspots. If this is the case you'll be required to visit a Citroen dealer or a trained mechanic to solve the issue.
A constant engine warning light could indicate that the electric power-assisted steering is not working properly. If this is so, then you should stop the car and make sure that the oil pressure is fine and the temperature is not too high before you start it. If the problem continues to persist, you will need to visit a Citroen dealership or a certified mechanic to fix the problem.
Dead Battery
The most common cause of the key fob that isn't working in your Berlingo is the battery in the coin is dead. The button cell inside the key can be easily replaced, but it is important to use the right voltage, size and type of battery. A non-compatible battery can damage the circuit board. A dead coin battery may also disable the anti-theft system. This is a security measure that prevents the engine from getting started without a physical key.
If the key fob is still not responding to the lock button even after replacing the battery, it could be an issue with the receiver module, which is not communicating with the other modules in your car. This can be diagnosed with an OBDII scan tool.
If the key fob still not responding, you can try reprogramming. Follow the steps in your owner's manual to do this. After the device has been reprogrammed device should function as expected.

Fault Diagnosis
Citroen Berlingo owners are generally satisfied with the reliability of the car. As with all vehicles, problems can happen. One of the most common is a dead battery on the key fob. Fortunately, it is simple to identify and is easily replaced within a matter of minutes. Other problems that can arise could be caused by a worn or damaged button or button, water damage to the electronic chip, signal interference or a remote keyless system receiver module that has developed an issue.
It is important to remember that not all key fob batteries are made in the same way. Some batteries are constructed from inferior materials, which can cause damage to your remote or other electronics. Make sure you use batteries of the same kind and voltage as the original when replacing the battery. Make sure that the new one is inserted correctly. When inserting the battery into the slot, ensure that the positive (+) face of the battery is facing upwards.
If you see the warning light on the dashboard of your car that appears to be an exclamation mark on it, this signifies that the vehicle is detecting a problem with its electric power-assisted steering. If this warning light appears when driving, it is recommended that you seek assistance from a qualified mechanic or Citroen Berlingo (incl Multispace) dealership.
Radio Interference
Radio interference could be a cause that your key fob isn't functioning at all. This is a problem that can be caused by devices that operate on the same frequency as a remote control. Some wireless security devices, such as LED lights sold on the market, can interfere with the RF signal. If you have one of these gadgets at home, consider shifting them to a different area to see if they help.
In addition to devices that utilize the same frequency, there are environmental factors that could interfere with a car's key fob. For instance, metal objects can influence the strength of the signal. Weather conditions can also bend the antenna of the fob, which results in a weaker radio signal. In certain situations the key fob might not be able to respond to radio signals, even if it is close to the vehicle.
To ensure that your key fob is functioning properly make sure you check the battery. The battery should be in good shape and the contacts should not be affected by corrosion. A corroded connection is the primary reason the keyfob doesn't respond to radio signals from vehicles. TheKeyLab depleted battery could cause the fob to malfunction. If the problem persists after replacing the battery, the antenna may be malfunctioning. A professional locksmith will examine the key fob and make the required repairs.