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How to Program a Car Key Modern cars have more than a key that starts the engine They also come with a remote that allows you to lock or unlock doors These key fobs have to be programmed to work Some keys for cars can be preprogrammed by the owner himself but it is best to speak with an expert This will avoid any damage to the computer system of the car and will ensure that the key functions properly How do you program a key Most cars had basic key systems up until the turn of 21st century The keys were made of metal and featured grooves that match the internal components of the ignition cylinder As technology advanced more and more automobile manufacturers began to combine electronic and physical protocols to avoid theft These key systems are called transponder keys or chip keys and are designed to make it harder for thieves to get into the vehicle The key chips inside the keys have a specific serial number which transmits an electronic signal to the receiver in your car The signal is compared with a code in the computer of the car when it is received If the codes are compatible then your car will start If not it will not start at all This is one of the primary reasons why you should always keep a spare key on your vehicle particularly in the case of transponderbased systems Youll need special equipment to learn to program keys Youll also need to purchase the blank key that matches your specific model and make They can be purchased from an auto dealership or from locksmiths but you must make sure that they are the correct ones If you try to use a key that is from another brand it will not work Begin by putting the new key in the ignition and turning it to on It is necessary to leave the new key in this position for approximately 10 minutes and 30 second When the time has passed you can remove the key and observe whether the security light on your dashboard was gone If not youll need to repeat the process for the third time This method is only compatible with GM vehicles and its not completely secure If youre seeking a more secure and reliable solution then you should consult a professional locksmith or the dealer to get your vehicle programmed with chip These professionals have the necessary tools and equipment to connect to your cars onboard diagnostics port and then make the change Keyless Entry Systems Keyless entry systems provide access to your property without the need for the use of a physical ID Security is offered by sensors that are combined with an onboard computer It is possible to manage and monitor the system from anywhere within the property Keys and locks are not required The system is also able to detect lost or stolen cards and disable them The latest models also support remote management and configuration and are cloudbased Modern cars are equipped with keyless entry systems The system works by emitting radio signals that are picked up using the keyfob The signals are compared to the code stored in the cars computer and if all is well the car will unlock The car wont start when the signals arent identical If your key fob is not already programmed it is possible to follow several steps to program it First youll need to make sure that all doors except the drivers door are locked Youll also need the original key fob as well as any extras youd like to program You can also check your local auto parts store to determine if they carry the right tool for your car If these steps do not work youll need to check the owners manual or a professional locksmith Once youve got the proper tool follow the manufacturers instructions to begin changing the program of your key fob automotive key programming is often relatively quick and easy For reprogram car key you may be asked to insert your new key into the ignition with all doors shut and then press an appropriate button on the fob within a short time The car may respond by reversing the door locks or emitting an audible chime which is an indication that the key has been successfully programmed Many locksmiths employ special tools to bypass the EEPROM security that is built into the remote of your car or key fob However its an extremely risky option and comes with the possibility of destroying the data stored on your cars computer This should be left to a professional who can minimize the risk of data corrupting and ensure that your keys are correctly programmed Transponder Keys Transponder keys also known as chip keys have an embedded microchip in the head of the key The antenna ring transmits electromagnetic energy to the transponder whenever the key is put into the barrel of the ignition lock This energy is absorbed into the chip which then transmits the radio frequency signal which includes an identification code that is matched with the unique digital serial number that is stored in the cars computer system This helps prevent unauthorized attempts to start the car since only the right key can do so The technology is believed to be more secure than a traditional car key as it makes it difficult for a thief hot wire the vehicle to start it But its not foolproof and thieves have discovered ways to evade and defeat the system which means that even cars equipped with transponder keys arent protected from theft You may be able program a transponder key on your own if you have an instrument that works with your car The key programmer comes with a manual that walks you stepbystep through the process Once you have your key and key programmer follow the directions carefully and ensure that the security light on your dashboard is turned on prior to turning your engine on If youre uncomfortable using 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 help They will have the tools and equipment needed to cut an uncut key erase the old one from the computer of the car and program the new key to work correctly This will help you save money and time and ensure that your cars safety system working just as it should Plus its a lot more secure than doing it yourself If you use a wrong key programmer or follow unofficial instructions and the data in your cars computer could be corrupted and the new key will not work Remotes You may have to reprogramme your car keys if they arent working Its an easy process for the majority of modern cars that have key fobs Certain models are more complicated and require a specific programming device which is usually available at the dealer or from auto locksmiths Fortunately most modern car manufacturers have made their key systems more secure to prevent theft of vehicles The key system is designed to stop hotwiring which is the practice of using a key from an other vehicle to start your cars engine This means that youll need to have at least two functioning key fobs for your vehicle in order to make the process work Its important to have at least two spare keys in your possession The keys have electronic chips in them which communicate with the cars receiver using radio signals The cars computer then compares the keys code to the one stored in its database If the codes match the car will be able to start If not the car will not start or fail to start Fortunately the majority of electronic keys can be programmed and replaced by an expert auto dealer or a locksmith with the right equipment If you can find a cheap car key programmer online or at an auto parts store the procedure should be fairly straightforward Youll have to follow a sequence of steps which includes inserting the key into the ignition turning it on without activating the engine and then turning off the key Youll need to repeat this process a certain number of times within a certain time period for your vehicle to enter programming mode This will be evident by the door locks cycling or a chime that sounds audible Certain cars of the present can only be programmed with the aid of a tool thats connected to the diagnostics port on the cars motherboard or an EEPROM programming process Most of these tools are very expensive and therefore are not accessible to the majority of car owners Many experts in the field recommend consulting with a professional auto dealership or locksmith to program your keys