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How to Program a Car Key Modern cars have more than just a key to start the engine They also have a remote that can lock and unlock doors Key fobs must be programmed in order to function properly It is possible to program certain keys for cars 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 works correctly How do you program a key Before the turn of the 21st century most cars used basic key systems The keys themselves were just metal and featured grooves that matched 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 referred to as transponder keys or chip keys and are designed to make it difficult for thieves to open the vehicle The key chips in the keys have a specific serial number that sends a signal to the receiver inside your car When the signal is received it compares it to a code stored in the cars computer If the codes match then the car will start If the codes dont match then your vehicle wont start at all This is one of the main reasons why you should always keep a spare key on your vehicle particularly if you have an electronic transponder Youll need special equipment to learn to program keys Youll also need to purchase an uncut key for your particular make and model You can purchase these at the locksmith shop or at a car dealership but its essential to purchase the correct keys If you use a key for another model it will not function To begin the process insert the new key into the ignition and switch it to the on position You will need to leave the new key in this position for approximately 10 minutes and 30 second After the time has passed you can remove your key and check if the security indicator on your dashboard has gone out If it did not then youll need to repeat the procedure for the third time This method is only compatible with GM vehicles and its not foolproof If youre seeking a more secure and reliable option you should seek out a professional locksmith or the dealer to have your car programmed with chip These professionals have the necessary tools and equipment to access your cars onboard diagnostics port and then make the change Keyless Entry Systems Keyless entry systems grant access to properties without the requirement of an actual credential Security is offered by sensors that are combined with an onboard computing device It is possible to monitor and control the system from anywhere within the property Keys and locks are not required The system can also detect lost or stolen cards and then deactivate them The newest models also allow remote management and configuration as well as are cloudbased Most modern cars come equipped with an entry system that is keyless To make this work the car emits radio signals that are detected by a special key fob These signals are then compared with the correct code in the cars computer and if everything is in order the car will unlock If the signals dont match the car will not start If your key fob has not been already programmed you may follow a series of steps to program it The first step is to make sure that all doors are locked except for the drivers side Also youll need the original key fob along with any additional keys you want to program You may also visit the local auto parts store to see if theyve got the right tool for your car If none of these options work you will have to consult your owners manual or an expert locksmith Once you have the correct tool you can begin the process of reprogramming your key fob by following the manufacturers instructions This procedure is usually quick and simple For example you might be asked to insert your new key into the ignition while keeping all doors closed and then press the button on the key fob within a brief time period The car could respond by turning off the doors or emitting an audible sound as an indication that the key was successfully programmed A lot of locksmiths utilize special tools to get around the EEPROM security built into your cars remote or key fob This is a risky method and can corrupt the data in your cars computer This is best left to a professional who can minimize the risk of data corrupting and ensure that your keys are programmed correctly Transponder Keys Transponder keys are also referred to as chip key They feature an embedded microchip inside the head of the keys The antenna ring transmits electromagnetic energy to the transponder whenever the key is placed into the barrel of the ignition lock The energy is absorbed by the chip and sends back the radio frequency signal which includes an identification code that matches with the unique digital serial number in the cars computer system This prevents any attempts by anyone else to start the car as only right keys can be used This technology is thought to be more secure than a traditional car key since it makes it difficult for a thief hot wire the vehicle and then start it However its not foolproof and thieves have found ways to trick and defeat the system so that even cars with transponder keys arent immune from theft Based on the make and model of your car depending on the make and model of your car you might be capable of programming a new transponder key yourself with a key programer that is compatible with your particular car The key programmer should 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 instructions carefully and make sure the security light on your dashboard is turned on prior to turning your engine ON You can seek out a professional locksmith to help you if you are not confident with a key programmer or if you have a car with more advanced features like remote head keys or intelligent keys car key programming ll have the right tools and equipment to cut the blank key remove your old one from your cars computer and then program the new key so that it functions correctly This will save you time and money and will keep your cars security system working just as it should It is also safer than doing it yourself Using the wrong key programmers or following unofficial guidelines could cause a problem with the information stored in your cars system resulting in the key not working Remotes You may need to reprogram your car keys if theyre not working Its a simple procedure for most modern vehicles that have key fobs Some models are more intricate and require a special programming device which is usually available from the dealer or from auto locksmiths To prevent theft of vehicles modern car manufacturers have increased the security of their key systems The key system is designed to stop hotwiring the method of using the key of another vehicle to start the engine and other similar methods To ensure that this method works you will require at minimum two key fobs working for your vehicle Its important to have two spare keys on hand The key fobs contain electronic chips that communicate via radio signals to the cars receiver The computer examines the code of the key with the database If the codes match the car will begin If the codes do not match then the car will not start or remain dead Luckily most of these electronic keys can be repaired and programmed by an expert locksmith or auto dealer using the appropriate equipment If you can find an inexpensive car key programmer on the internet or at an auto parts store the process will be relatively simple Youll have to follow a set of instructions that include inserting the ignition keys turning it on without starting the vehicle and then switching off the key You will need to repeat the steps a certain number of times in a specified time frame to put your vehicle into programming mode The door locks will turn on and off or a chime will sound Certain cars of the present can only be programmed by means of a tool connected to the onboard diagnostics port or an EEPROM programming procedure These tools are expensive and therefore are not accessible to most car owners So many experts in the field recommend to consult an experienced auto dealer or locksmith for key programing services