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How to Program a Car Key Modern cars come with more than just a single key to start the engine They also come with a remote that can lock and unlock doors These key fobs need to be programmed in order to function properly Certain keys for cars can be preprogrammed by the owner himself but its best to consult with an expert This will protect against any possible damage to the computer system and also ensure that the new key works properly How do you program the key The majority of cars had basic key systems prior to the turn of 21st century Keys themselves were metal and featured grooves that were connected to the internal parts of the ignition cylinder As technology improved more and more automobile makers began to mix electronic and physical protocols to avoid theft These key systems are known as transponder keys or chip keys and theyre designed to make it more difficult for thieves to open the vehicle The key chips in the keys have a specific serial number that transmits signals to the receiver inside your car The signal is then compared to a code in the computer of the car when it is received If the codes match your car will begin If the codes dont match your car will not even start This is why it is important to keep a spare car key especially if the system is transponderbased If youre interested in learning how to program a key youll need some specific equipment Youll need to buy a blank key that matches your car model and make car key programming can purchase them from an auto locksmith or a locksmith dealership but its important to buy the right one If you attempt to use a key that is from another brand it will not work Start the process by inserting the new key in the ignition and turning it on It is necessary to keep the key in this position for around 10 minutes and 30 seconds After the time is up you can take out your key and see if the security indicator on your dashboard has gone out If it did not then youll need to repeat the procedure a third time Keep in mind that this method can only work on GM vehicles but its not 100 secure If youre looking for a more secure and reliable method you should seek out a professional locksmith or the dealer to get your vehicle programmed with chip They have the tools and equipment to access your cars onboard diagnostics port and then make the change Keyless Entry Systems Keyless entry systems permit access to property without the requirement of a physical credential They utilize a combination of sensors and an onboard computer to offer security It is possible to monitor and control the system from anywhere within the property Keys and locks are not required The system is also able to detect and deactivate lost or stolen cards The newest models also allow remote management and configuration as well as are cloudbased Most modern cars come equipped with a keyless entry system The system works by sending radio signals which are received by a special keyfob The signals are then compared to the code that is stored in the computer of the car and if everything is well the car will start to unlock The car will not start if the signals are not the same There are a variety of steps you can follow to program your new key fob if it isnt already programmed Youll first need to make sure that all doors except the drivers door are locked Youll also need the original key fob along with any additional keys youd like to program You could also check with the local auto parts store for the right tool to program your car If none of these options work you will need to consult your owners manual or an expert locksmith Once you have the right tool you can begin the reprogramming of your key fob by following the manufacturers instructions The process is usually quick and easy It is possible to be instructed to put the new key in the ignition while all doors are closed and then press the button on the keyfob after a certain time period The car could then respond by turning off the door locks or emitting a chime to signal that the key has been successfully programmed Many locksmiths have special tools that allow them to bypass the builtin EEPROM security in the key fob of your car or remote This is a dangerous method and could cause data corruption on your cars computer This should be left to a professional who can minimize the risk of data corruption and make sure that your keys are programmed correctly Transponder Keys Transponder keys sometimes referred to as chip keys have an embedded microchip in the head of the key When the key is placed in the barrel of the ignition lock and then turned to ON the antenna ring emits an energy burst through the transponder chip The chip absorbs this energy and then transmits a radiofrequency signal that includes an identification code This code is in line with the unique serial numbers that are stored in the computer of the car This is to prevent unauthorised attempts to start the car since only right keys can be used The technology is believed to be more secure than a traditional car key because it makes it harder for thieves to hot wire the vehicle and start it However its not foolproof and thieves have found ways to trick and defy the system so that even vehicles with transponder keys arent protected from theft Based on the make and model of your car You may be able to program a new transponder by yourself with a key programer that is compatible with the car you own The key programmer should include an easytofollow guide to walk you through the procedure of programming your key Once you have the key and a key programmer follow the steps carefully and make sure the security light on your dashboard is on prior to turning your engine on If youre not comfortable the use of a key programmer or if your car comes with more advanced features such as remote head keys or smart keys you may turn to a professional locksmith assistance Theyll have the appropriate tools and equipment to cut the blank key remove your old one from the computer in your car and then program the new key so that it functions properly This will save you time and money and will help keep your cars security system operating as it should Additionally its much safer than making it yourself If you use a incorrect key programming software or follow a guide that is not official the information in your cars computer could be corrupted and the new key wont work Remotes If your car keys dont work you may need to change the programming This is a simple procedure for most modern cars that use key fobs Some models are more intricate and require a specific programming device which is normally available from the dealer or from auto locksmiths Fortunately many modern car manufacturers have improved their key systems to be more secure in order to decrease the risk of theft from vehicles The key system is designed to avoid hotwiring the practice of using the key of another vehicle to start the engine and other similar methods This means that youll need to have at least two working key fobs for your vehicle to ensure that the process works Its essential to have two spare keys available Key fobs are equipped with electronic chips that communicate using radio signals with the cars receiver The computer in the car then compares the keys code to the one stored in its database If the codes match the car will begin If not the car will be dead or refuses to start programming car key of these electronic key can be programmed and replaced by a professional locksmith or dealer in the field with the proper equipment If youre able to find an inexpensive car key programmer on the internet or in an auto parts store the process is fairly simple Youll have to follow a particular set of steps that include inserting the key into the ignition turning it on but not activating the engine then turning the key off Youll need repeat the steps a specific number of times over an exact time period to get your vehicle into programming mode This is indicated by the door locks cycling or a chime that sounds audible Some modern cars can only be programmed with the aid of a device that is connected to the diagnostics port on the cars motherboard or an EEPROM programming process Unfortunately most of these devices are very expensive and therefore unattainable for the majority of car owners Most car experts recommend consulting a professional auto dealership or locksmith to program your keys