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How to Program a Car Key Modern cars come with more than a key to start the engine, they also include a remote to lock and unlock doors. Key fobs have to be programmed to work properly. It is possible to program certain car keys by the owner, however it is advised to consult a professional. This will prevent any damage to the computer system of the car and ensure that the key functions properly. How to Program a Key Prior to the beginning of the 21st century, most cars used basic key systems. The keys themselves were just metal with grooves that corresponded to the internal parts of the ignition cylinder. As time passed and technology improved as it did, automobile manufacturers began blending physical and electronic protocols to protect against theft. These key systems are referred to as transponder keys or chip keys and they're designed to make it harder for thieves to get into the vehicle. The key chips come with a unique serial code which transmits a signal to the receiver inside your car. When the signal is received, it compares it to a code stored in the car's computer. If the codes match then your car will start. If not, it won't start at all. This is why it is important to keep an extra car key, especially if the system is transponder-based. If you want to learn how to program keys, you'll require certain equipment. You'll also require a blank key for your particular model and make. You can purchase them from a locksmith or a car dealership, but it's crucial to buy the right one. If you try to use a key from an alternative model, it won't work. To begin the process, insert the new key into the ignition and turn it to the “on” position. You will need to leave the new key in this position for around 10 minutes and 30 seconds. Once the time is up, you can remove the key and check if the security light on your dashboard went out. If not, you'll need to repeat the process for the third time. Remember that this method will only work with GM vehicles but it's not foolproof. If you're looking for a reliable and secure solution go to a locksmith or a dealer to get your car programmed using an embedded chip. They are equipped with the tools and equipment required to connect to the onboard diagnostics port of your car and perform the switch. Keyless Entry Systems Keyless entry systems give property access without requiring a physical credential. They use sensors in conjunction with an onboard computer for security. This lets you control the system and monitor its activity from any place within the property, and it eliminates the need for keys or locks. The system is also able to detect and deactivate lost or stolen cards. In addition, the newest models are cloud-based, allowing for remote management and configuration. Modern cars are equipped with keyless entry systems. To accomplish this it emits radio signals that are detected by a special key fob. The signals are then compared to the correct code in the car's computer and when everything is in order the car will start to unlock. The car won't start if the signals are not identical. There are several steps you can follow to program your new key fob if it's not programmed yet. First, you'll need make sure that all doors are locked, except for the driver's side. You'll also require the original key fob and any other accessories you want to program. You can also visit the local auto parts store to see if they've got the appropriate tool for your car. If these steps don't work, you'll need to check the owner's manual, or an expert locksmith. Once you've got the proper tool, you can follow the instructions of the manufacturer to begin reprogramming your key fob. This process is often relatively quick and easy. For instance, you may be asked to insert your new key into the ignition with all doors shut and then press an appropriate button on the fob within a very short time period. The car may then respond by adjusting the door locks or emitting a chime to indicate that the key was successfully programmed. Many locksmiths are equipped with special tools that let them bypass the built-in EEPROM security on the key fob of your car or remote. However it's an extremely risky procedure and comes with the possibility of destroying the data on your car's computer. This is best left to a professional who can lower the chance of data corrupting and ensure that your keys are correctly programmed. Transponder Keys Transponder keys, also referred to as chip keys, have a microchip embedded in the head of the key. When the key is inserted into the barrel of the ignition lock, and then turned to ON the antenna ring emits a burst of electromagnetic energy through the transponder chip. This energy is absorbed by the chip and sends back the radio frequency signal, which includes an identification code that corresponds with the unique digital serial number of the car's computer system. This prevents unauthorised attempts to start the car as only the right keys can be used. This technology is thought to be more secure than a conventional car key because it makes it harder for thieves to “hot wire” the vehicle to start it. But it's not foolproof and thieves have discovered ways to deceive and defy the system – so that even cars with transponder keys aren't protected from theft. You might be able to program a transponder key by yourself with an appropriate key programmer for your car. The key programmer will come with a manual that will guide you step-by-step through the procedure. Follow the directions and switch on the security lights on your dashboard prior to starting your engine. If you're not comfortable with using a key programmer or if your car has more advanced features like remote head keys or smart keys, you can turn to a professional locksmith for assistance. They'll have the appropriate tools and equipment to cut your blank key, delete your previous one from the computer in your car, and then program the new one so that it will work correctly. This will save you time and money and will help keep your car's security system functioning as it should. Additionally, it's much safer than making it yourself. If you choose the incorrect key programming software or follow unofficial instructions, the information in your car's system could be corrupted and the new key won't work. Remotes If your car keys aren't working, you might need to reprogram them. It's a simple procedure for most modern cars that have key fobs. However, some models are more complex and require programming using an additional device that's typically available from the dealer or auto locksmiths. To decrease the risk of theft from vehicles, modern car manufacturers have improved the security of their key systems. The key system is designed to prevent hot-wiring, which is the act of using a key from a different vehicle to start the engine of your car. This means that you'll need to have at minimum two working key fobs for your vehicle in order to be able to use the system. This is one of the main reasons why it's a good idea to always have at least one spare key on hand. The key fobs have electronic chips inside them that communicate with the car's receiver via radio signals. The computer in the car then compares the code on the key to the one in its database. If the codes match, the car will start. If the codes don't match the car won't start or remain dead. Most of these electronic key can be programmed and replaced by an experienced locksmith or auto dealer using the appropriate equipment. The process is fairly simple if you are able to locate a key programmer that is cheap on the internet or at an auto parts store. You'll need to follow a set of steps which include inserting the ignition key and turning it on without actually starting the car, and then turning off the key. You'll need to repeat this a certain number of times within a specified time period for your vehicle to enter programming mode. The door locks will turn on and off or a chime will sound. Some modern cars can only be programmed with the aid of a tool that's connected to the onboard diagnostics port, or an EEPROM programming process. These tools are expensive and are therefore not affordable for the majority of car owners. Many experts in the field recommend consulting a professional auto dealership or locksmith to program your keys.