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How to Program a Car Key Modern cars have more than a key that can start the engine They also come with a remote control that can lock or open doors These key fobs have to be programmed in order to function Some keys for cars can be programmed by the owner however its best to consult with an expert This will help avoid any damage to the computer system and also ensure that the new key is working properly How do you program a key Up until the turn of the 21st century the majority of cars had basic key systems The keys themselves were metal and had grooves that matched the internal components of the ignition cylinder As technology improved the number of car manufacturers began to combine electronic and physical protocols to stop theft Key systems also known as transponder keys or chips keys are designed to make it more difficult for thieves to open an automobile The key chips have an unique serial number that sends a message to the receiver inside your car When the signal is received it is compared to the code that is stored in the cars computer If the codes are compatible then the car will start If not it will not start at all This is why it is important to keep an extra car key especially if the system is based on transponders Youll require specialized equipment to be able to program keys Youll also require an uncut key for your specific make and model They can be bought at the dealership or through a locksmith however you must be sure theyre the correct ones If you use a key for another model it will not function To begin the process simply insert the new key into the ignition and switch it to the on position Youll need to leave the key in this position for about 10 minutes and 30 seconds After the time has passed you can take off your key and check if the security indicator on your dashboard has gone out If it didnt youll need to do it again for the third time This method is only compatible with GM vehicles and isnt 100 secure If you want a more secure and reliable option go to an auto locksmith or dealer to have your car programmed with an embedded chip They have the tools and equipment needed to access the onboard diagnostic port of your car 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 achieved through sensors that are combined with an onboard computing device This lets you manage the system and monitor activities from any location within the property and it eliminates the requirement for keys or locks The system can also detect and block stolen or lost cards The newest models also allow remote management and configuration and are cloudbased The majority of modern cars are equipped with a keyless entry system To make this work the vehicle emits radio signals which are picked up by a particular key fob The signals are compared to the code that is stored in the cars computer and if all is well the car will start to unlock If the signals do not match the car will not start There are several steps you can take to program your new key fob if its not already programmed First youll need to ensure all the doors are locked with the exception of the drivers side Youll also require the original key fob as well as any extras youd like to program You may also visit your local auto parts store to see if theyve got the right tool for your vehicle If none of these options work youll have to consult the owners manual or an expert locksmith Once you have the right tool follow the manufacturers instructions to begin programming your key fob This process is often relatively quick and easy For instance you could be instructed to insert your new key into the ignition while keeping all doors shut and then press an appropriate button on the fob within a brief time The car may then respond by cycling the door locks or emitting a sound to signal that the key was successfully programmed Many locksmiths use special tools to bypass the EEPROM security built into your cars remote or key fob However this is an extremely risky option and could lead to the possibility of destroying the data stored on the computer in your car Its best to have an expert handle this task as they will be able to reduce the chance of data corruption and also ensure your keys are properly programmed Transponder Keys Transponder keys sometimes referred to as chip keys have a microchip built into the head of the key When the key is inserted into the barrel of the ignition lock and turned into the ON position the antenna ring transmits an electromagnetic energy blast through the transponder chip The energy is absorbed by the chip and it transmits an audio frequency signal that contains an identification code that matches with the unique digital serial number that is stored in the cars computer system This prevents unauthorized attempts to start the car since only the right key can do so This technology is believed to be more secure than traditional keys for cars because it makes it harder for a thief to hot wire the vehicle and start it But its not foolproof and thieves have found ways to deceive and thwart the system so that even cars that have transponder keys arent safe from theft Based on the make and model of your car depending on the make and model of your car you might be in a position to program a brand new transponder key by yourself with a key programer that is compatible with your particular car The key programmer comes with a guide that will take you stepbystep through the procedure Follow the directions and switch on the security lights on your dashboard prior to starting your engine If youre uncomfortable the use of a key programmer or if your car comes with more advanced features such as remote head keys or smart keys you can turn to a professional locksmith help They will have the tools and equipment necessary to cut an uncut key erase the old one from the computer in the car and program the new key to work correctly reprogram car key will help you save money and time and keep your cars safety system functioning exactly as it should It is also safer than doing it yourself Using the wrong key programmers or following unofficial guides can alter the information stored in the vehicles system and result in the key not working Remotes If your car keys arent working it could be necessary to change the programming Its a simple procedure 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 from the dealer or through auto locksmiths To reduce vehicle thefts modern car manufacturers have enhanced the security of their key systems The key system is designed to stop hotwiring the method of using another vehicles key to start the engine and other similar methods Therefore youll need to have at minimum two working key fobs for your vehicle to ensure that the process works Its essential to have at minimum two spare keys in your possession Key fobs are equipped with electronic chips that communicate via radio signals with the cars receiver The computer in the car then compares the keys code to the one in its database If the codes match the car will start If reprogram car key do not match the car wont start or remain dead The majority of these electronic keys can be programmed and replaced by a professional locksmith or auto dealer with the proper equipment The process should be relatively easy if you find a cheap key programmer on the internet or at an auto parts store You will need to follow a set of instructions which include inserting the ignition key turning it on without starting the vehicle and then shutting off the key Youll have to repeat this a certain number of times within a specified time period for your vehicle to enter programming mode The door locks will be triggered or chime Certain modern vehicles can only be programmed by means of a tool thats connected to the onboard diagnostics port or an EEPROM programing procedure The majority of these tools are very expensive and therefore unaffordable by most car owners So many experts in the field recommend that you speak with a professional locksmith or auto dealer to program your keys