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How to Program a Car Key Modern cars come with more than just a key which will start the engine They also have a remote control that allows you to lock or open doors Key fobs have to be programmed in order to function properly It is possible to preprogram certain car keys by the owner however it is advised to consult a professional This will ensure that there is no damage to the computer system of the car and ensure that the key is working correctly How do you program a key Up until the turn of the 21st century the majority of cars utilized basic key systems Keys themselves were metal and featured grooves that were connected to the internal components of the ignition cylinder As technology advanced the number of car manufacturers began to combine electronic and physical protocols to stop theft These key systems are known as transponder keys or chip keys and theyre designed to make it harder for thieves to start the vehicle The key chips inside the keys have a unique serial number which transmits an electronic signal to the receiver in your car When the signal is received it is compared to a code stored in the cars computer If the codes match then your car will start If the codes arent compatible your car wont even start This is the reason you should keep a spare car key especially if your system is transponderbased If youre interested in learning how to program keys youll need some special equipment Youll need to buy a blank key that matches the model and make of your car They can be purchased from the dealership or through locksmiths however you must be sure that they are the correct ones If you use a key for another model it wont work Start the process by inserting the new key in the ignition and turning it to on It is necessary to keep the key in this position for about 10 minutes and 30 seconds When the time has passed you can take out the key and see whether the security light on your dashboard was gone If it didnt go out you will need to repeat the process for the third time This method is only compatible with GM vehicles and isnt 100 secure If automotive key programming looking for a reliable and secure solution go to a locksmith or a dealer to have your car programmed with an embedded chip These professionals are equipped with the tools and equipment needed to connect to the onboard diagnostic port on your car and make the necessary changes Keyless Entry Systems Keyless entry systems allow property access without the requirement for an actual credential Security is offered by the combination of sensors and an onboard computer 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 lost or stolen cards and then deactivate them In addition the newest models are cloudbased and allow for remote management and configuration Modern cars are equipped with keyless entry systems This system works by emitting radio signals that are picked up using the keyfob The signals are then compared with the correct code stored in the cars computer and when everything is in order the car will start to unlock The car wont start in the event that the signals are not the same There are a variety of ways to program your new key fob if it isnt already programmed First youll need to ensure that all doors are locked except for the drivers side car key programming ll also require the original key fob along with any additional keys you want to program You can also visit your local auto parts store to see if theyve got the right tool for your vehicle If these steps dont work youll need to consult your owners manual or an expert locksmith Once you have the proper tool Once you have the correct tool you can begin reprogramming of your key fob following the manufacturers instructions The process is usually quick and easy You may be instructed to insert the new key in the ignition when all doors are shut and then press the button on the keyfob within a certain time period The car might then respond by adjusting the door locks or emitting a sound to indicate that the key has been successfully programmed Many locksmiths use special tools to bypass the EEPROM security that is built into the remote of your car or key fob 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 correctly programmed Transponder Keys Transponder keys also referred to as chip keys are equipped with a microchip embedded in the head of the key The antenna ring transmits electromagnetic energy to the transponder when the key is put into the ignition lock barrel The chip absorbs the energy and then sends a radio frequency signal which contains an identification number The code is matched to the unique digital serial numbers of the computer of the car This will prevent any unauthorised attempts to start the car as only the correct key will be able to perform the task This type of technology is thought to be more secure than a conventional car key as it makes it harder for a thief hot wire the vehicle and start it Its not foolproof and thieves have found ways to trick and defeat the system So even cars with transponder keys arent safe from theft Based on the make and model of your car You may be in a position to program a brand new transponder by yourself with a key programer that is compatible with the car you own The key programmer will come with a stepbystep guide that will guide you through the procedure of programming your key Once you have the key and key programmer follow the directions carefully and ensure the security light on your dashboard is ON before turning your engine ON programming car key can ask an expert locksmith to assist you if you are not confident using the key programmer or you have a car with more advanced features such as remote head keys or intelligent keys They will have the tools and equipment required to cut an uncut key erase the old key from the computer of the car and then program the new key to function properly This will save you time and money and will ensure that your cars security system functioning exactly as it should Its also a lot more secure than doing it yourself If you use a incorrect key programming software or follow unofficial instructions the information in your cars system could be corrupted and the new key wont function Remotes If your car keys dont work you may need to reprogram them Its a straightforward process for most modern vehicles that use keyfobs However some models are more complicated and need to be programmed with the aid of a special device thats usually available from a auto locksmith or dealer Fortunately many modern car manufacturers have made their key systems more secure in order to prevent theft of vehicles The key system is designed to prevent hotwiring which is the act of using a key from another vehicle to start the engine of your vehicle To be able to make this process work you will require at least two key fobs that are functioning for your vehicle It is essential to have at minimum two spare keys on hand The key fobs have electronic chips that transmit radio signals with the cars receiver The cars computer then compares the code on the key to the one in its database If the codes match the car will start If the codes dont match then the car will not start or will remain dead Luckily most of these electronic keys can be repaired and programmed by an experienced locksmith or an auto dealer using the appropriate equipment The process should be relatively simple if you can find a lowcost key programmer on the internet or at an auto parts store Youll need to follow a specific set of steps that include inserting the key into the ignition turning it on without activating the engine and then turning the key off You will need to repeat the steps a certain number of times in 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 vehicles are programmable with a tool connected to the onboard diagnosis port or EEPROM programming Unfortunately the majority of these devices are very expensive making them unaffordable for most car owners So many auto experts suggest that you speak with an experienced locksmith or auto dealer for key programing services