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Citroen Berlingo Key Fob TroubleshootingCitroen’s Berlingo Multispace occupies a utilitarian niche in the people carrier market. Its sliding rear door allows it to be easily inserted into bay parking spaces and its tough cabin is more durable than most upmarket competitor offerings.If your key fob was submerged in soapy water or saltwater it might not function again, even after a new battery and changing the program. This is because the internal chip has been damaged due to exposure to water.Water DamageAfter retrieving your key fob from whatever puddle, pool or washing machine it’s been being a part of, rid it of as much water as you can by shaking it. Lay it flat with the button side facing up and leave it to drain for a short time while you wipe it clean using a towel. This will stop any condensation from damaging your electronic chip.If the warning light on your dashboard that looks like a vehicle with the key symbol appears on your Mk 2 or Mk 3 Citroen Berlingo then it could indicate an immobilizer issue. It is a security device within the vehicle to deter thieves from stealing it. If this is the case then you should see a Citroen dealership or a certified mechanic to fix the issue.A constantly flashing engine warning light may indicate that the electric power assisted steering is not working properly. If this is the case then you must stop the car and make sure that the pressure in the oil is in good order and that the temperature is not too high before you restart it. If the issue persists then you should visit a Citroen dealer or a trained mechanic to fix the issue.Dead BatteryA dead battery in the coin is the most common reason for your key fob not to work in your Berlingo. The button cell inside the key can be replaced however it is essential 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 measure of safety which prevents the engine from being started without an actual key.If the key fob is still not responding to the lock button despite replacing the battery it could be an unreliable receiver module that isn’t communicating with other modules on your vehicle. citroen c4 key fob can be detected using an OBDII scan tool.If the key fob isn’t working, you can try reprogramming the key fob. Follow the steps in your owner’s manual for this procedure. It should be working fine after it is reprogrammed.Diagnostics of a faultThe reliability of the Citroen Berlingo is generally praised by its owners. As with all vehicles, it is possible for faults to occur. A key fob that is dead is one of the most common problems. Fortunately, this is easy to diagnose and can be repaired in a few minutes. Other issues that could arise could be caused by a worn or damaged button, water damage to the electronic chip, signal interference, or a remote keyless system receiver module that has developed a fault.It is important to keep in mind that not all key fob batteries are created to be the same. Some batteries are made from inferior materials that can damage your remote or other electronics. When replacing the battery, ensure you make sure the replacement battery is of the same type and voltage as the original. Also, make sure the new battery is fitted correctly. When inserting the battery into the slot, make sure the positive (+) face of the battery is facing upwards.If you notice an exclamation point in the form of an equilateral triangle on your dashboard, it means that there is a problem with the vehicle’s electric power-assisted driver. If this warning light appears during driving, it is recommended that you seek assistance from a qualified mechanic or Citroen Berlingo (incl Multispace) dealership.Radio InterferenceRadio interference could be the reason of your key fob not functioning at all. This is a problem that could be caused by devices operating on the same frequency as remote controls. For example, some wireless security systems and aftermarket LED lights can interfere with radio frequency signals. Move these devices to an alternative location if you’ve got them in your home.In addition to devices that use the same frequency, there are environmental factors that can interfere with a car’s key fob. Metal objects, like a car can impede the strength of the signal. Rainy weather can also alter the antenna of the fob, which results in a weaker radio signal. In some cases the key fob might not be able to respond to radio signals even if it is near to the vehicle.To ensure that your key fob is functioning properly examine the battery. It should be in good condition and the contacts should be free of corrosion. A damaged connection is the main reason why the keyfob doesn’t respond to radio signals coming from vehicles. A depleted or damaged battery can cause a fob to malfunction. If you replace the battery and the problem persists, it’s likely that the antenna is not functioning properly. A locksmith can examine the keyfob and fix it.