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This refreshed fifth-generation Ibiza is an attractive contender in the supermini segment. It is competing with the Renault Clio and Peugeot 208 as well as the Ford Fiesta.

Use a small flat-head screwdriver or a thumbnail (A) to open the battery compartment cover of the key fob (B). Replace the CR2025 battery and ensure that it is installed in the proper direction.

Dead Coin Battery

A dead coin battery is the most common reason of a key fob that isn't locking or unlocking your vehicle. When it is dead, you will notice a decrease in range or no power. It is easy to replace with a brand new one (CR2025) from an area supermarket. Be aware that using the wrong or incompatible batteries could damage your key fob. Make sure the battery you replace has the same size and voltage and also the same specification.

If your fob was exposed to clean water, for example rainwater or soapy tap water It is likely that corrosion has caused damage to the chip's electronic components. You might try cleaning your chip using isopropyl alcohol or an electronic cleaner to check if it works but it is likely that the chip has been damaged and fried.

The most simple solution is to buy an entirely new key fob. They are readily available from major dealerships and can be fitted by a skilled mechanic. You can also buy them online, like on eBay. The best thing to do is to work on a flat surface with adequate lighting. This makes it easier to work on the smaller parts inside. You'll also be able to avoid placing things in the wrong spot. Always keep your key fob in a location that is safe and secure.

Water Damage

If your key fob is soaked by dropping it in the pool or fumbling it in the washing machine, you may think that it's lost but there's hope. The problem is when the circuit board inside the fob comes in contact with water - it is a great conductor and cuts off components. It also accelerates the process of corrosion and rust.

This is an easy solution. Find something absorbent to put inside the fob. A paper towel or tissue will be ideal. Use a cotton swab soaked in isopropyl for cleaning the circuit board as well as any other components. The fob should dry for several days in a dry and warm environment.

Replace the battery once the fob has dried out with a new one that is the same dimensions and the same polarity ('+' (pointing upwards). The fob isn't easy to open in order to access the battery, however when you have a flat head screwdriver it will be a breeze to slide in. Once the fob is assembled it should function like normal. If it fails, you may have to re-program it or replace the module.

Radio Interference

If a keyfob functions correctly, it emits an audio frequency that is received by a module in your vehicle. If the signal is disrupted the key fob will not work. This could be due objects, weather conditions or other transmitters operating in the same frequency range near your car.

This can cause your key fob to not activate the vehicle's functions for example, the ignition switch or the security system. It is best to replace the battery in your key fob.

Some LED lighting from the aftermarket that uses the same frequency as a remote key fob can interfere with the signal, preventing it from reaching the receiver modules. To avoid interference, the LED lights should be turned off or switched to the opposite frequency.

If the problem persists after installing a new battery, the antenna of your key fob may be damaged or is malfunctioning. This is since the antenna is responsible for sending signals from the key fob to the receiver module. A scan of the OBDII can help you identify the issue by telling you exactly what's wrong with the system. The scanner will ask for details about your car, including the make, model engine type, and VIN number.

Faulty Receiver Module

The key fob has an electronic receiver that sends the signals for locking and unlock. All on-board electronic components will cease functioning if this component has a problem. If this happens, reprogramming with an OBDII scanner or replacing the key fob may help.

There are several possible causes, including a dead coin battery water damage or signal interference. You can reset the on-board computer by disconnecting the 12 volt batteries for about 15 minutes. This will flush out any residual power that may be causing issues. Begin by removing your cable from the negative terminal of the battery first, then the positive terminal. After 15 minutes, connect the battery in reverse order: positive first, negative second.

Dirt and water can damage the internal chip of the key fob. If your key fob stops working after getting wet, clean it using isopropyl or an electronic cleaner. After that, replace the battery. If your key has stopped working after exposure to salted or soapy water, it's likely that the chip is damaged and must be replaced.

A defective fuse for the antenna module may also be the cause. It is the fuse that sends an indication to the vehicle to lock or unlock. Depending on your model the fuse can be found in a variety of locations like the engine bay, the side of the dashboard, beneath the rear seat car key cover, or trunk.