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How to Fix G28 With Your Hyundai i20 Key FobHyundai I20 vehicle owners can lock and unlock their cars remotely. They can also start their vehicle in advance and monitor key fob functions through a mobile application using their smartphone.Occasionally, the key fob will stop working. This could be caused by a dead battery or water damage, or signal interference.BatteryHyundai has created the smart key fob for their vehicles that enables you to perform a variety of remote functions including locking and unlocking doors, starting your vehicle and even activating an emergency button. It's an excellent way to save time and energy for drivers, however it can be frustrating when the system doesn't function properly. If you're struggling to get your Hyundai i20 key fob to function properly there are a few things you can do to fix the issue.The first step is checking the battery. Most smart key fobs use the coin cell battery which is easily replaced in minutes. This is usually the quickest and most affordable method to fix the problem. It is possible to purchase replacement batteries in many stores and on the internet. Once you have a new battery in place, re-open the key fob to make sure the battery is sitting in the correct position and that it is in contact with all connections.Take a picture or note the position of the old battery in the circuit before removing it. This will let you replace the battery the same way. Most Hyundai smart key fobs have the CR2032 battery, which is sold in a variety of shops and on the internet. Close your key fob after you have installed the battery and test it.ContactsIf your Hyundai key fob stopped working completely out of the black and white, and you've still not lost it, you may be experiencing a malfunctioning internal chip. The receiver module in the car utilizes radio frequency signals to communicate with the remote. If these signals are obstructed by nearby transmitters, or objects the key fob could cease to function properly.Take a look at the Hyundai Digital key system if your goal is to unlock, lock and start your vehicle during your commute in Reno. The advanced keyless system operates through an app on your smartphone, allowing you to share Digital Key access up to three people. This is a great feature when you're giving someone an escort or leaving your vehicle with valet services.A dead battery is the most common reason for a Hyundai i20's key fob not working. If yours is displaying indications of dying, such as slow operation or not responding at all, it's time to replace the battery. While replacing and opening your Hyundai key fob battery isn't too difficult, there are a few things to know prior to beginning. Take a photo or take a note about how the old battery is laid within the circuit board. This will assist you in placing the new battery in the same spot.Water DamageThe rubber seals on the key fob protect the chip's electronic components from water. So, if it survives a splash of water from a washing machine, or a brief submersion in light rain it's unlikely to be damaged. If you've dropped it in a pool or ocean then the water can penetrate the seals and damage the circuit board, which can be expensive to repair.The first step is drying the key fob thoroughly. This can be done in various ways. You can place it in a bag with silica packets to absorb the moisture. Alternatively, you can make use of rice that isn't cooked but it's important not to contact the key fob when it's still damp as it could cause contamination to the internal components.Using alcohol such as isopropyl or an electronic cleaner can also help in cleaning the contacts on the circuit board. If, however, the chip is damaged, it's likely that you'll need a replacement key fob.It's simple to change the battery on your Hyundai key fob. The process is typically not difficult. You can follow an YouTube video tutorial to help you through the process or refer to your owner's manual. It's a good idea keep an extra key fob at for you in case you need to continue driving your vehicle while you wait for the repair key to arrive.Diagnosis of a FaultIt can be difficult to determine an issue if your check engine light is flashing and you have a fault-code. This is the reason why the diagnostic scanner is commonly called an OBD 2 (or OBD 2 in the United Kingdom). They are available in Bluetooth models that connect to your smartphone, or standard models that come with an OBD 2 reader.The throttle position sensor (TPS) is located in the i20, could become defective. The sensor is responsible for measuring the opening angle of the throttle valve. This information is sent to the control unit, which helps calculate the amount of fuel required. A malfunctioning throttle position sensor could result in a decrease in engine performance, jerky acceleration, and RPM fluctuations when driving.Another issue common to i20s is the faulty transmission. The transmission is a complex component that has many gears that connect to transfer power from the engine to the wheels. The friction between the gears causes wear and tear that can cause the transmission to fail. Signs of a defective transmission include clunking or grinding sounds and an abrupt acceleration.Spark plugs are another issue for the i20. Spark plugs that are defective can cause damage to the engine by not delivering the correct amounts of sparks to the cylinders. A damaged spark plug could cause costly and severe engine damage if it is not checked.