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How to Program a Car Key Modern cars come with more than a key that will start the engine They also come with a remote which can be used to lock or open doors Key fobs need to be programmed to work car key programming is possible to program certain car keys by the owner but it is advised to consult a professional This will protect against any possible damage to the cars computer system and ensure that the new key works correctly How do you program the key Before the turn of the 21st century most cars used basic key systems Keys were made of metal and had grooves to correspond to the internal parts in the ignition cylinder As technology improved more and more automobile makers began to combine physical and electronic protocols in order to prevent theft These key systems are also referred to as transponder keys or chips keys are designed to make it harder for thieves to open an automobile The key chips have unique serial codes which transmits a signal to the receiver in your car When the signal is received it is compared to an existing code in the cars computer If the codes match then your car will begin If the codes dont match your vehicle wont start at all This is one of the primary reasons why you should always keep a spare key for your vehicle especially in the case of transponderbased systems Youll need special equipment to learn how to program keys Youll also need to purchase the blank key for your particular model and make You can buy them at the locksmith shop or at a car dealership but its crucial to purchase the correct keys If you use a key that is for another model it wont function Begin by putting the new key in the ignition and turning it to on Youll need to keep the new key in this position for approximately 10 minutes and 30 seconds After the time has passed you can remove your key and verify that the security indicator on your dashboard has gone out If programming car key didnt then youll need to repeat the process for a third time This method is only compatible with GM vehicles and its not completely secure If youre looking for a more secure and reliable method you should consult an expert locksmith or dealer to get your vehicle programmed with chip They are equipped with the tools and equipment required to connect to the onboard diagnostic port on your vehicle and make the change Keyless Entry Systems Keyless entry systems give property access without requiring a physical credential They use a combination of sensors and an onboard computer for security It is possible to monitor and control the system from anywhere in the property Keys and locks are not required The system is also able to detect and deactivate lost or stolen cards In addition the newest models are cloudbased and allow for remote management and configuration Modern cars come with keyless entry systems To make this work it emits radio signals that are picked up by a special key fob These signals are then compared with the correct code that is stored in the cars computer and when everything is in order the car will unlock If the signals do not match and the car does not start There are a variety of steps you can follow to program your new key fob if its not programmed yet Youll first need to be sure that all doors except the drivers door are locked Youll also require the original key fob along with any additional keys you want to program You could also check with your local auto parts store for the right programming tool for your car If none of these options work youll have to consult the owners manual or an expert locksmith Once you have the correct tool Once you have the correct tool you can begin changing the programming of your key fob by following the instructions provided by the manufacturer This process is often relatively simple and quick For example you might be directed 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 period The car might respond by reversing the door locks or emitting an audible chime as a sign that the key was successfully programmed A lot of locksmiths have tools that let them bypass the builtin EEPROM security of the key fob of your car or remote This is a risky method and can corrupt the data in your cars computer It is recommended to have an expert handle this as they will be able to lower the chance of data corruption and also 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 When the key is inserted into the ignition lock barrel and turned to ON the antenna ring transmits an electromagnetic energy blast through the transponder chip The chip absorbs this energy and then transmits a radiofrequency signal that contains an identification code The code is matched to the unique serial numbers of the computer of the car This prevents unauthorized attempts to start the car as only the correct key can do so The technology is believed to be more secure than traditional keys for cars because it makes it harder for a thief to hot wire an automobile and start it But its not foolproof and thieves have discovered ways to trick and defeat the system so that even cars with transponder keys are not protected from theft Depending on the brand and model of your car you may be capable of programming a new transponder key by yourself using a key programmer thats compatible with your particular car The key programmer should come with an instruction manual that will guide you through the process of programming your key Follow the directions and turn on the security lights on your dashboard prior to starting your engine You can contact an expert locksmith to assist you if youre not confident with the key programmer or you own a car that has more advanced features like remote head keys or intelligent keys They will have the tools and equipment necessary to cut a blank key delete the old one from the computer of the car and then program the new key for it to work correctly reprogram car key will help you save money and time and will keep your cars safety system functioning exactly as it should Plus its a lot safer than trying to do it yourself Making use of the wrong key programmers or following unofficial instructions could cause a problem with the information stored in your cars system resulting in the new key not working Remotes If your car keys arent working it could be necessary to reprogram them Its a simple procedure for most modern vehicles that use keyfobs However some models are more complicated and require programming using a special device thats usually available from the auto locksmith or dealer Fortunately most modern car manufacturers have made their key systems more secure in order to prevent theft of vehicles The key system was designed in a way to stop hotwiring which is the act of using a key from an other vehicle to start the engine of your vehicle To ensure that this method works youll need at least two key fobs working for your vehicle Its essential to have at minimum two spare keys in your possession Key fobs are equipped with electronic chips that communicate with the cars receiver using radio signals The computer checks the keys code with the database If the codes match the car will start If not the vehicle will not start or fail to start Luckily most of these electronic keys can be programmed and replaced by an expert locksmith or an auto dealer with the right equipment If youre able to find an inexpensive car key programmer online or at an auto parts store the procedure will be relatively simple Youll need to follow a specific sequence of steps which includes inserting the key into the ignition and turning it on without activating the engine then turning off the key Youll need repeat the steps a specific number of times within an exact time period to put your vehicle in programming mode The door locks will turn on and off or a chime will sound Certain cars of the present can only be programmed with the help of a device that is connected to the diagnostics port on the cars motherboard or an EEPROM programming process These tools are very expensive and therefore unaffordable by the majority of car owners Therefore the majority of auto experts suggest to consult an expert locksmith or auto dealer for key programming services