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How to Fix a Problem With Your Hyundai i20 Key FobHyundai i20 owners can lock and unlock their cars remotely. They can also start their vehicle ahead of time and check key-fob functionality using an app on their smartphone.Occasionally the key fob may stop working. This could be due an unresponsive battery or water damage, or signal interference.BatteryHyundai has created a smart key fob that is able to perform various remote functions, like locking and unlocking your doors, starting your car and even activating the panic button. It's an ideal way to save time and energy for drivers, however it can be a hassle if it doesn't work as intended. If you're having trouble getting your Hyundai i20 key fob to function correctly there are a few things you can try to fix the problem.The first step is to test the battery. Most smart key fobs use the coin cell battery which is easily replaced in minutes. This is the fastest and most affordable way to fix your problem. Replacement batteries are readily available in the majority of stores or on the internet. After you have put the new battery, re-open the key fob to ensure that the battery is in the right position and that it is in contact with all connections.Note down the location of the old battery in the circuit before removing it. This will allow you to install the new battery the same way. The majority of Hyundai smart key fobs use a CR2032 battery which is available in most shops and on the internet. Close your key fob after installing the battery and testing it.ContactsIf your Hyundai key fob suddenly stopped working and you haven't dropped it, there may be a problem with the internal chip. The receiver module in your vehicle relies on a radio frequency signal to communicate with the remote control, so it is possible that the signals are affected by nearby transmitters or objects, it may cause the key fob to stop functioning properly.Think about the Hyundai Digital Key system if your goal is to lock, unlock, and start your vehicle while you commute to Reno. This advanced keyless system operates with an app on your smartphone and allows you to share Digital Key access up to three persons. This is helpful when giving your friend a ride when you leave your car with valet services.The most common reason for the Hyundai i20 key fob to stop working is a dead battery. It's time to replace the battery if the one you have is showing signs of age like a slow operation or no response at any time. While opening and replacing your Hyundai key fob battery isn't difficult but there are a few things you should know before starting. First, make a note of the way that the old battery is laid inside the circuit board or take a photograph. This will allow you to put the new battery in the same location.Water DamageThe rubber seals on the key fob guard the electronic chip from water. If it is able to survive a quick splash from a washing-machine, or just a brief dip in a light drizzle it is unlikely to be damaged. However, if you drop it in the ocean or pool, the water may get through the seals and damage the circuit board, which is costly to repair.The first step is to dry the key fob completely. You can do this in many ways. You can put it in a plastic container with silica gel bags that will suck the moisture out of it. You can also make use of rice that isn't cooked but it's crucial not to contact the key fob when it's still wet as it could cause contamination to the internal components.You can also clean the contacts of the circuit board with isopropyl or electronic cleaner. If the chip has gone bad it's best to accept you'll have to replace the key fob.Replacing the battery on a Hyundai key fob is easy and usually not messy. You can follow a YouTube tutorial or your owner's manual to guide you through the process. It's always a good idea keep an extra key fob in the go so that you are able to continue driving your vehicle while waiting for the repair key to arrive.Diagnosis of a FaultIf your check engine light is on and the fault code is present, it may be difficult to determine the issue without the use of a diagnostic scanner, often referred to as an OBD 2. They are available in Bluetooth versions which connect to your phone or standard models that have a reader attached to the socket.The throttle position sensor (TPS), which is located in the i20 can become defective. This sensor is responsible for measuring the opening angle of the throttle valve. This information is transmitted to the control unit that helps calculate the amount of fuel required. A malfunctioning throttle sensor can result in rapid acceleration that is jerky, fluctuations in RPM and decreased engine performance.Another issue that is common in the i20s is a faulty transmission. The transmission is a complex component with many gears that connect to transfer power from the engine to wheels. In time, the friction between the gears can cause the transmission's failure. Clanging or grinding sounds as well as the jerky acceleration can be signs of a faulty gearbox.The spark plugs in the i20 are a second common problem area. The problem with the plugs is that they can cause damage to engines by not delivering enough sparks to every cylinder. hyundai replacement key cost damaged spark plug could cause expensive and serious engine damage if it is not checked.