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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 cars remotely. They can also start their vehicle prior to time and monitor key fob functions through a mobile application on their smartphone. Sometimes the key fob can stop working. It could be due to a dead battery or water damage, or signal interference. Battery Hyundai has developed a smart key fob that is able to perform a variety of remote functions, such as locking and unlocking your doors, starting your car and even activating the panic button. It's an excellent way to cut down on time and energy for drivers, however it can be frustrating when the system isn't working properly. There are a few options you can do if your Hyundai i20's key fob isn't working properly. The first step is to check the battery. Most smart key fobs are powered by a coin cell battery, which can be replaced in a matter of minutes. This is usually the fastest and most cost-effective method to fix the issue. You can find replacement batteries in a variety of stores as well as online. Once you have a new battery in place, re-open the key fob to ensure that the battery is sitting in the proper position and that it's in contact with all of the connections. Be sure to take a picture or make a note of the way in which the old battery was placed in the circuit board prior to removing it. This will allow you to install the new battery the same way. Most Hyundai smart keyfobs are equipped with CR2032 batteries, available in a variety of stores or online. Close your key fob after installing 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 could have a problem with an internal chip. The receiver module inside your vehicle utilizes a radio frequency signal to communicate with the remote control, therefore when this signal is disrupted by nearby transmitters or objects, it can cause the key fob to cease functioning properly. If you're looking for a smart way to unlock, lock, and start your car during your Reno commute, think about the Hyundai Digital Key system. The advanced keyless system operates via an app on your smartphone and allows you to share Digital Key access up to three persons. This is helpful when offering your friend a ride when you are leaving your car using valet service s. A dead battery is the most frequent reason for an Hyundai i20's key fob not working. It's time to change the battery if yours shows signs of aging, such as slow operation or no response at all. Although opening and replacing your Hyundai key fob battery isn't a big deal but there are some points to be aware of prior to beginning. The first step is to take note of where the old battery is laid on the circuit board or take a photo. This will enable you to put the new battery in the same location. Water Damage The rubber seals on the key fob protect the 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 be damaged. However, if you drop it in the ocean or pool, the water can penetrate the seals and damage the circuit board, which can be 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 bag with silica packs to absorb the moisture. Alternately, you can make use of uncooked rice, but it's important not to touch the key fob while it's still damp as it could cause contamination to the internal components. You can also clean the the circuit board using isopropyl or electronic cleaner. If the chip is in danger of being damaged it is best to accept that you'll need to replace the key fob. Replacing the battery in a Hyundai key fob is easy and usually not messy. You can follow a YouTube tutorial or your owner's manual guide you through the procedure. It's a good idea keep an extra key fob to ensure you can drive your car while you wait for your key to be repaired. Troubleshooting If your check engine light is on and the fault code is present, it may be difficult to pinpoint the problem without the use of a diagnostic scanner commonly referred to as an OBD 2. These are available in Bluetooth versions which connect to your smartphone, or standard models that have an attached reader. The throttle position sensor (TPS) is located in the i20, can become defective. The sensor is used to determine the opening angle of throttle valve. This information is passed to the control unit, and contributes to the calculation of the amount of fuel needed. A malfunctioning throttle position sensor will result in a decrease in engine performance, jerky acceleration and RPM fluctuations during driving. Another issue that is common in the i20s is a faulty transmission. The transmission is a complicated component that has many gears that connect to transfer the power from the engine. The friction between the gears leads to wear and tear, which can cause the transmission to fail. Symptoms of a faulty transmission include clunking or grinding sounds and rapid acceleration that is jerky. Spark plugs are an additional area of concern for the i20. Faulty plugs could cause engine damage due to not providing enough sparks to each cylinder. A damaged spark plug could result in costly and serious engine damage if not properly checked.