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How to Fix a Problem With Your Hyundai i20 Key Fob Hyundai i20 owners can lock and unlock their cars remotely. They can also start their vehicle prior to time and monitor the functions of their key fob through a mobile application on their smartphones. However, at times, the key fob might stop functioning due to a reason. This could be caused by an unresponsive battery, water damage, or even signal interference. Battery Hyundai has developed a smart key fob that can be used to perform various remote functions, including locking and unlocking your doors, starting your car and even activating the panic button. It's a great way to save time and energy for drivers, but it can be a hassle if it doesn't work as intended. There are a few things you can do to fix your Hyundai i20's key fob isn't functioning properly. The first step is checking the battery. The majority of smart key fobs utilize batteries that are coin-cell and is easily replaced in minutes. This is usually the quickest and most cost-effective method to fix the problem. You can purchase replacement batteries in a variety of stores and online. Once you have a new battery open the key fob to ensure that the battery is in the correct place and that it's making contact with all connections. Take a picture or note the location of the battery that was removed from the circuit before removing it. This will allow you to replace the battery the same way. hyundai tucson spare key utilize CR2032 batteries, which can be found in most shops or online. Once you have the battery installed, close up your key fob, and then test it to determine if it's functioning again. Contacts If your Hyundai keyfob suddenly stopped working and you did not drop it, there may be a problem in the internal chip. The receiver module inside your vehicle utilizes a radio frequency signal to communicate with the remote control, therefore it is possible that the signals are interfered with by nearby transmitters or objects, it could cause the key fob's functionality to cease properly. Think about the Hyundai Digital key system if you want to unlock, lock and start your vehicle while you commute to Reno. This innovative keyless entry system is operated via a smartphone app and allows sharing Digital Key access with up three other people. This can be useful when offering a friend a ride or when you are leaving your car using valet services. A dead battery is the most common cause of the Hyundai i20's key fob not functioning. It's time to change the battery if yours shows signs of aging, such as slow operation or no response at all. While the process of replacing and opening the battery in your Hyundai key fob battery isn't too difficult, there are a few things to consider prior to beginning. First, take note of the way that the old battery sits on the circuit board or take a photo. This will help you put the new battery in the same position. Water Damage The rubber seals on the fob's key seal the electronic chip from water. If it can withstand a brief splash from a washing-machine, or just a brief dip in a light drizzle, it's unlikely to get damaged. If you've dropped it in the pool or ocean then the water can penetrate the seals and cause damage to the circuit board, which is costly to repair. The first step is drying the key fob completely. This can be done in various ways. It can be placed in a plastic bag with silica gel packs that will draw the moisture out of it. You could also use uncooked rice, but be careful not to touch it while it's still wet. It could be contaminated by the internal components. Utilizing isopropyl alcohol or an electronic cleaner could also be helpful in cleaning the contacts on the circuit board. However, if the chip has been damaged, it's probably best to accept that you'll need to replace the key fob. It is simple to replace the battery in your Hyundai key fob. The procedure is generally not difficult. You can follow an YouTube tutorial or your owner's guide to guide you through the process. It's a good idea keep an extra key fob in case you can use your vehicle while waiting for your repaired key. Diagnostics of a fault If your check engine light is on and a fault code is present it can be difficult to identify the issue without the use of a diagnostic scanner commonly called an OBD 2. These are available in Bluetooth versions which connect to your phone or standard models with an attached reader to the socket. One of the most common issues with i20s is the throttle position sensor (TPS) is damaged. The sensor is responsible for determining the opening angle of the throttle valve. This information is sent to the control unit that contributes to the calculation for the amount of fuel required. A damaged throttle sensor can cause abrupt acceleration, erratic RPM changes and reduced engine performance. Transmission problems are a common issue in the i20s. The transmission is a complex component that contains a number of gears that work together to transfer power from the engine. The friction between the gears cause wear over time which can cause the transmission to fail. Sounds of grinding or clunking as well as an acceleration that is jerky can indicate an inefficient gearbox. The spark plugs inside the i20 are another frequent problem area. A defective plug can cause engine damage through not sending enough sparks to every cylinder. If unchecked the damaged spark plug could cause serious and costly engine damage.