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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 fit into parking bays and its robust cabin is more resistant to crashing than most upmarket rival offerings. If your key fob was submerged in soapy water or saltwater, it may not work again, even after a new battery and reprogramming. This is because the internal chip has been damaged due to exposure to water. Water Damage Shake your key fob to drain as much water as you can. Place it on the ground with the button down, and let it drain for a few minutes before wiping the inside using a soft cloth. This will stop any condensation from damaging the electronic chip. If the warning light on your dashboard that looks like a vehicle with a key symbol in it illuminates on your Mk 2 or Mk 3 Citroen Berlingo then this could be a sign of an immobilizer fault. This is a security component within the vehicle to deter thieves from hotwiring it. If this is the case, then you will need to go to an Citroen dealership or a certified mechanic to fix the issue. A constant warning light could indicate that the electric power-assisted steering has a fault. If this is the case you need to stop the vehicle and check the temperature and pressure of your oil before restarting it. If the problem continues to persist, you'll have to visit a Citroen dealership or a trained mechanic to fix the problem. Dead Battery A dead battery in the coin is the most frequent reason for your key fob not to work in your Berlingo. The button cell inside the key can be replaced easily however it is essential to select the correct size, voltage and type of battery. An uncompatible battery can harm the circuit. A dead battery for a coin can also disable the anti-theft system. This is a safety feature that prevents the engine from starting without the physical key. If the key fob still not responding to the lock button after replacing the battery It could be due to an unreliable receiver module that is not communicating with the other modules on your vehicle. This can be detected using an OBDII scan tool. If G28CarKeys not responding, try reprogramming. Follow the instructions in your owner's manual to do this. It should work once it is reset to its original program. Diagnosis of a Fault The reliability of the Citroen Berlingo is generally appreciated by its owners. As with all vehicles problems can happen. A key fob that is dead is one of the most frequent problems. Fortunately, it is simple to find and can be fixed in just a few minutes. Other issues include a worn out button, water damage on the electronic chip and interference in the signal or a remote receiver module that is defective. It is vital to be aware that not all keyfob batteries will be the same. Certain batteries are made from inferior materials and could damage your remote key fob as well as other electronics in your vehicle. When replacing the battery, only make sure you use a battery of the same type and voltage as the original. Also, make sure the new battery is inserted correctly. Make sure the positive (+) side of the battery is facing upwards when it is placed in the slot for the battery. If you notice an exclamation point in the form of a triangle on the dashboard, it's a sign that there is a problem with the vehicle's electric power-assisted driver. If this warning light illuminates while you are driving and it is not able to be removed, we recommend you contact a trained mechanic at a Citroen Berlingo dealer (incl Multispace). Radio Interference If your key fob isn't working suddenly, it could be a result of radio interference. This is a problem that can be caused by devices that use the same frequency as remote controls. Certain wireless security systems, for instance LED lights sold on the market, can interfere with the RF signal. If you have one of these devices at home, consider shifting them to a different area to see if they help. In addition to devices using the same frequency, there are environmental factors that could affect the signal of a car's key fob. Metal objects, for example could interfere with the signal strength. Rainy weather can also cause the antenna of the fob to turn, which results in weaker signals. In some cases even if the fob is near to the car, it may not respond to radio signals. Examine the battery to confirm the health of your key fob. The battery must be in good condition and the contacts should not be affected by corrosion. A corroded or damaged connection is the main reason why a keyfob does not respond to radio signals coming from the vehicle. A depleted battery could cause a fob to malfunction. If you replace the battery, but the problem persists, it's possible that the antenna is defective. Locksmiths can check the keyfob to make repairs.