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How to Program a Car Key Modern cars come with more than just a key which starts the engine They also come with a remote that allows you to lock or unlock doors These key fobs need to be programmed to work properly Some car keys can be programmed by the owner themselves but it is recommended to consult an expert This will ensure that there is no damage to the computer system of the vehicle and ensure that the key works 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 just metal and featured grooves that corresponded to the internal parts of the ignition cylinder However as time progressed and technology improved and improved automobile manufacturers began blending physical and electronic protocols to stop theft Key systems like these are also referred to as transponder keys or chips keys are designed to make it more difficult for thieves to steal the vehicle The key chips that are in the keys have a specific serial number that sends an electronic signal to the receiver inside your car When the signal is received it compares it with an existing code in the cars computer If the codes match then your car will begin to start If the codes dont match then your vehicle wont start at all This is why you should keep an extra car key particularly if your system is transponderbased If youre interested in learning how to program a key youll need some special equipment Youll need to buy an uncut key that matches your car model and make These can be purchased at a dealership or by locksmiths however you must be sure that they are the correct ones If you attempt to use a key that is from an alternative model it will not work 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 is up you can take out your key and verify that the security indicator on your dashboard has gone out If it didnt youll need repeat the process another time Keep in mind that this method can only work with GM vehicles and its still not foolproof If youre looking for a safer and reliable method you should consult a professional locksmith or dealer to have your car programmed with chip They have the tools and equipment needed to access your cars onboard diagnostics port and make the switch Keyless Entry Systems Keyless entry systems allow property access without the requirement of a physical credential They use a combination of sensors and an onboard computer to offer security It is possible to monitor and control the system from any place within the property Keys and locks are not required The system can also identify stolen or lost cards and deactivate them The most recent models also permit remote management and configuration as well as are cloudbased Modern automobiles are equipped with keyless entry systems To accomplish this it emits radio signals which are picked up by a particular key fob The signals are then compared to the code stored in the computer of the car and if all is well the car will unlock The car wont start if the signals are not identical If your key fob isnt already programmed you can follow a series of steps to program it First youll need to ensure that all doors are locked with the exception of the drivers side Youll also require the original key fob as well as any extras you want to program You can also check your local auto parts shop to determine if they carry the right tool for your car If these steps dont work youll have to go through the owners manual or an expert locksmith Once you have the correct tool follow the manufacturers instructions to begin programming your key fob This process is usually quick and easy It is possible to be instructed to put the new key into the ignition after closing all doors and then press the button on the keyfob after a specific time The car may respond by cycling door locks or emitting an audible sound as a sign that the key was successfully programmed Many locksmiths have special tools that allow them to bypass the builtin EEPROM security in the cars key fob or remote But this is an extremely risky procedure and has the potential of destroying the data on the computer in your car This is best left to a professional who can lower the chance of data corruption and make sure that your keys are properly programmed Transponder Keys Transponder keys sometimes referred to as chip keys have a microchip embedded 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 transmits an electromagnetic energy blast through the transponder chip The chip absorbs this energy and then transmits a radiofrequency signal which contains an identification number The code is matched to the unique digital serial numbers of the cars computers This prevents unauthorised attempts to start the car since only the right key will be able to start the car The technology is believed to be more secure than traditional car keys because it makes it difficult for thieves to hot wire a vehicle and get it started Its not foolproof and thieves have discovered ways to trick and defeat the system So even cars with transponder key are not safe from theft Depending on the make and model of your vehicle depending on the make and model of your car you might be in a position to program a brand new transponder key by yourself using a key programmer thats compatible with the car you own The key programmer comes with a user guide that will guide you stepbystep through the process Once you have your key and a key programmer follow the instructions carefully and ensure the security light on your dashboard is turned ON prior to turning the engine ON If youre not comfortable with using a key programmer or if your vehicle has more advanced features like remote head keys or smart keys you can turn to a professional locksmith for assistance Theyll have the right tools and equipment to cut your blank key delete your previous one from the computer in your car and then program the new key to ensure that it will work correctly This will save you time and money and will ensure that your cars security system working as it should Its also a lot more secure than doing it yourself If you use a incorrect key programming software or follow unofficial guides and the data in your cars system can be corrupted and the new key will not function Remotes It is possible to change the programming of your car keys if theyre not working Its a straightforward process for most modern cars that have key fobs However some models are more complex and need to be programmed with the help of an instrument that is available from a dealer or auto locksmith Fortunately many modern car manufacturers have made their key systems more secure to prevent theft of vehicles The key system is designed to prevent hotwiring the method of using the key of another vehicle to start the engine and other similar methods To make this process work youll require at least two key fobs working for your vehicle It is essential to have two spare keys available Key fobs are equipped with electronic chips that communicate via radio signals with the cars receiver The cars computer then compares the keys code with the one in its database If the codes match the car will start If G28 do not match the car wont start or will remain dead Fortunately the majority of electronic keys can be repaired and programmed by an expert locksmith or an auto dealer equipped with the proper equipment The procedure should be fairly easy if you find a lowcost key programmer on the internet or in an auto parts store Youll have to follow a set of steps that includes inserting the ignition keys turning it on without actually starting the vehicle then turning off the key Youll need repeat the steps a specific number of times over the timeframe you specify to get your vehicle into programming mode This will be indicated by the door locks cycling or a chime that sounds audible Some modern cars can only be programmed with the aid of a tool thats connected to the onboard diagnostics port or an EEPROM programming process Unfortunately the majority of these devices are very expensive which makes them unaffordable for the majority of car owners As such most auto experts suggest that you speak with an experienced auto dealer or locksmith for key programing services