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How to Fix a Problem With Your Hyundai i20 Key FobHyundai i20 owners can to lock and unlock their vehicle remotely. They can also start the vehicle ahead of time and monitor key fob functions via an app for their smartphone.Sometimes, the key fob will stop working. It could be due to a dead battery or water damage, or even signal interference.BatteryHyundai has created a smart key fob that is able to perform various remote functions, including locking and unlocking your doors, starting your vehicle and even triggering the panic button. It's an excellent way to cut down on time and energy for drivers, however it can be a hassle if the system doesn't work correctly. There are a few options you can do in the event that your Hyundai i20's primary fob isn't working correctly.The first thing you need to do is to check the battery. Most smart key fobs use batteries that are coin-cell and is replaced in minutes. This is the fastest and cheapest way to fix your problem. Batteries for replacement are available at the majority of stores or on the internet. After you have put the new battery then re-open the key fob to ensure that the battery is sitting in the correct place and is in contact with all connections.Note down the location of the battery that was removed from the circuit before taking it out. This will help you install the new battery in the same manner. The majority of Hyundai smart keyfobs have CR2032 batteries, which are available in most shops or online. Once you have the battery installed shut down your key fob, and then test it to see if it's working again.ContactsIf your Hyundai key fob suddenly stopped working and you didn't drop it, there may be a problem in the internal chip. The receiver module inside your car uses radio frequency signals to communicate with the remote control, therefore when this signal is blocked by nearby transmitters or objects, it might cause the key fob to cease functioning properly.Think about the Hyundai Digital key system if you're looking to unlock, lock and start your car while you commute to Reno. This innovative keyless entry system works with a smartphone app and lets you share Digital Key access with up to three others. This is helpful for giving your friend a ride when you leave your car with valet services.The most common reason for a Hyundai i20 key fob to cease working is a dead battery. If yours is displaying signs of dying, like slow operation or not responding at all it's time to replace the battery. Although replacing your Hyundai keyfob battery shouldn't be difficult, you should be aware of a few things prior to starting. Take a photo or make notes of how the old battery is laid in the circuit board. This will help you place the new battery in the same spot.Water DamageThe key fob comes with rubber seals to protect the chip's electronic components 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's unlikely to be damaged. However, if hyundai i40 key dropped it in the pool or in the ocean, 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 thoroughly. It can be done in many ways. It can be placed in a bag with silica bags to absorb the moisture. You could also use uncooked rice however, be careful not to contact it while it's still wet. This could lead to contamination of its internal components.The use of isopropyl alcohol, or an electronic cleaner could also help in cleaning the contacts on the circuit board. If the chip is in danger of being damaged and you suspect it, you'll have to replace the key fob.Replacing the battery on the Hyundai key fob is easy and usually not messy. You can refer to a YouTube tutorial or the owner's manual to guide you through the process. It's always a good idea have an extra key fob on for you in case you need to continue to drive your car while you wait for the repaired key to arrive.Diagnosis of a FaultIt isn't easy to pinpoint a problem if your check engine light comes on and you have a fault code. This is why an OBD diagnostic scanner is usually called an OBD 2 (or OBD 2 in the United Kingdom). These are available in Bluetooth versions that connect to phones or standard models with an OBD 2 reader that is connected to the socket.The throttle position sensor (TPS) is located in the i20, can fail. This sensor is responsible to determine the opening angle of the throttle valve. This information is transmitted to the control unit and is used to the calculation of the amount of fuel needed. A problem with the throttle position sensor could cause a reduction in engine performance, jerky acceleration, and RPM fluctuations during driving.Another issue that is common in i20s is the faulty transmission. The transmission is a complicated component with many gears that work together to transfer power from the engine to the wheels. Over time the friction between the gears can lead to the transmission's failure. Symptoms of a faulty transmission include clunking or grinding noises and rapid acceleration that is jerky.Spark plugs are another aspect to be concerned about for the i20. Faulty plugs can cause engine damage through not sending enough sparks to every cylinder. A damaged spark plug could cause costly and serious engine damage if ignored.