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How to Fix a Problem With Your Hyundai i20 Key Fob Hyundai i20 owners can to lock and unlock their vehicles remotely. They can also start their vehicle ahead of time and check the key fob's functions using an app for their smartphone. However, sometimes the key fob won't functioning for a reason. This could be caused by a dead battery, water damage, or even signal interference. Battery Hyundai has created the smart key fob for their vehicles, which allows you to use a variety of remote-controlled functions, such as locking and unlocking doors, launching your vehicle and triggering a panic button. It's an excellent way to save time and energy for drivers, but can be a hassle if it doesn't work as intended. There are a few options you can do when your Hyundai i20's main fob isn't working properly. The first step is checking the battery. Most smart key fobs are powered by a coin cell battery, which can be easily replaced within minutes. This is usually the fastest and most cost-effective method to solve the issue. You can buy replacement batteries in most stores as well as online. Re-open the keyfob after installing the new battery to make sure that the battery is in the correct position and in contact with all connections. Make sure you snap a photo or take a note of how the old battery was placed on the circuit board prior removing it. This will enable you to install the new battery in the same way. The majority of Hyundai smart key fobs use batteries that are CR2032, which are available in many stores and on the internet. Close your key fob after you have installed the battery, and then test it. Contacts If your Hyundai key fob has stopped working completely out of the blue and you've not dropped it, you may have a problem with an internal chip. The receiver module inside the car utilizes radio frequency signals to communicate with the remote. If the signals are disrupted by nearby transmitters, or other objects the key fob could stop working correctly. If you're looking to find a clever way to unlock, lock, and start your car during your Reno commute, look into the Hyundai Digital Key system. The advanced keyless system operates via an app on your smartphone. It enables you to share Digital Key access up to three people. hyundai car keys can be useful when giving a friend a ride or when you leave your car with valet services. A dead battery is the primary cause of an Hyundai i20's key fob not working. It's time for a new battery if the one you have is showing signs of aging and is slow to operate or no response at all. Although replacing and opening your Hyundai key fob battery isn't a big deal, there are a few things to consider prior to starting. First, make a note of the way that the old battery is laid within the circuit board, or take a picture. This will allow you to place the new battery in the same place. Water Damage The rubber seals on the key fob shield the electronic chip from water. If it is able to withstand a short splash from a washing machine, or an unintentional dip in light rain, it's unlikely to get damaged. If you drop it into a pool or ocean, the water could penetrate the seals, causing damage to the circuit board. This is a costly repair. The first step is to dry the key fob thoroughly. This can be accomplished in several ways. It can be placed in a plastic bag with silica gel bags that will draw the moisture out of it. You can also cook rice uncooked, but be careful not to touch it while it's still damp. This could contaminate the internal components. You can also clean the contacts of the circuit board with isopropyl or electronic cleaner. However, if the chip is damaged, it's likely that you'll require a replacement key fob. Replacing the battery in a Hyundai key fob is simple and typically not a big mess. You can follow a YouTube tutorial video to help you through the process or consult your owner's manual. 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 replacement key to arrive. Diagnosis of a Fault It can be difficult to diagnose the cause of a problem when your check engine light is on and you have a fault code. This is why the diagnostic scanner is typically known as an OBD 2 (or OBD 2 in the United Kingdom). These are available in Bluetooth versions that connect to your phone, or standard models that have an attached reader. One of the most common issues with i20s is the throttle position sensor (TPS) is defective. This sensor is responsible to determine the opening angle of the throttle valve. This information is transmitted to a control unit, which helps calculate the amount of fuel needed. A malfunctioning throttle sensor will result in sudden acceleration, RPM fluctuations and reduced engine performance. Transmission issues are another frequent issue for i20s. The transmission is a complicated part with a variety of gears that interlock to transfer power from the engine to the wheels. The friction between the gears cause wear and tear that can cause the transmission to fail. Symptoms of a faulty transmission include clunking or grinding noises and an abrupt acceleration. The spark plugs on the i20 are a second common problem area. The problem with defective spark plugs is that they can harm the engine by not delivering the right amount of sparks to every cylinder. If unchecked a damaged spark plug could cause serious and costly engine damage.