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How to Fix a Problem With Your Hyundai i20 Key Fob Hyundai i20 owners are able to lock and unlock their vehicles remotely. They can also start their vehicle prior to time and monitor the functions of their key fob by using a mobile application using their smartphone. But, sometimes, the key fob won't working due to some reason. G28 could be caused by a dead battery, water damage, or even signal interference. Battery Hyundai has developed a smart key fob that can be used to perform various remote functions, such as locking and unlocking your doors, launching your car and even activating the panic button. It's a fantastic feature for drivers to save time and effort, however it can be challenging when the system stops working correctly. If you're having trouble getting your Hyundai i20 key fob to perform as it should There are a variety of things you can try to solve the issue. The first thing to do is check the battery. The majority of smart key fobs are powered by a coin-cell, which can be replaced within minutes. This is typically the fastest and most affordable way to resolve the issue. Batteries for replacement are available at most stores or online. Re-open the keyfob after installing the new battery to make sure that the battery is in its correct position and is in contact with all connections. Be sure to snap a photo or take a note of the way in which the old battery was positioned on the circuit board prior removing it. This will help you install the new battery in the same way. Most Hyundai smart key fobs use the CR2032 battery that is available in most shops and on the internet. Close your key fob after you have installed the battery, and then test it. Contacts If your Hyundai keyfob suddenly stopped working and you weren't able to drop it, it could be a problem with the internal chip. The receiver module inside your vehicle uses a radio frequency signal to communicate with the remote control, therefore in the event that this signal is disrupted by nearby transmitters or objects, it may cause the key fob to stop functioning properly. If you're looking for a smart way to unlock, lock, and start your car during your Reno commute, look into the Hyundai Digital Key system. This advanced keyless entry system works via an app on your smartphone that allows you to share Digital Key access with up to three additional people. This is helpful when giving an individual a ride or when you leave your car with valet services. A dead battery is the main cause of a Hyundai i20's key fob not working. It's time to replace the battery if it shows signs of aging or has a slow response or no response at any time. While opening and replacing the battery in your Hyundai key fob battery isn't too difficult but there are a few points to be aware of prior to beginning. First, take a note of where the old battery sits on the circuit board or take a picture. This will enable you to put the new battery in the same place. Water Damage The key fob has rubber seals to protect the chip's electronics from water. If it survives a quick splash from a washing machine, or just a brief dip in a light rain, it's unlikely to be damaged. If you drop it into the ocean or in a pool and the water sank into the seals, causing damage to the circuit board. This is an expensive repair. The first step is drying the key fob thoroughly. This can be done in various ways. You can place it in a bag along with silica packs to absorb the moisture. Or, you could use uncooked rice but it's crucial not to contact the key fob when it's still wet as it could cause contamination to the internal components. Using isopropyl alcohol or an electronic cleaner may also help in cleaning the contacts on the circuit board. However, if the chip is fried then it's likely that you'll require a new key fob. It is easy to change the battery on your Hyundai key fob. The process is usually not messy. You can consult an YouTube tutorial or your owner's guide to guide you through the process. It is a good idea to keep an extra key fob in hand so that you can continue driving your vehicle while you wait for the repair key to arrive. Diagnostics of a fault It can be difficult to determine the cause of a problem when your check engine light is flashing and you have a fault-code. This is the reason why an OBD diagnostic scanner is usually known as an OBD 2 (or OBD 2 in the UK). These are available in Bluetooth models that connect to your smartphone, or standard models that come with an integrated reader. One of the most common issues with i20s can be that the throttle position sensor (TPS) develops a fault. This sensor is accountable to determine the opening angle of the throttle valve. This information is sent to an electronic control unit, which aids in calculating the amount of fuel required. A malfunctioning throttle position sensor can result in reduced engine performance, jerky acceleration and RPM fluctuations while driving. Another issue that is common in the i20s is the malfunctioning transmission. The transmission is a complicated component made up of many gears that connect to transfer power from the engine to the wheels. In time the friction between the gears can lead to transmission failure. The sound of grinding or clunking and an acceleration that is jerky can indicate a faulty gearbox. Spark plugs are a different aspect to be concerned about for the i20. A defective spark plug can damage the engine because they do not deliver the right amount of sparks to every cylinder. If they are not checked the damaged spark plug could result in serious and expensive engine damage.