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How to Program a Car Key Modern cars use more than just a key to start the engine. They also have a remote that can lock and unlock doors. These key fobs have to be programmed in order to function. It is possible to pre-program certain keys for cars by the owner, but it is best to consult an expert. This will avoid any damage to the computer system of the vehicle and ensure that the key functions correctly. How to program a key Before the turn of the 21st century most cars used basic key systems. The keys themselves were just metal with grooves that matched the internal components of the ignition cylinder. As technology advanced the number of car makers began to combine physical and electronic protocols in order to prevent theft. These key systems are referred to as transponder keys or chip keys and they're designed to make it difficult for thieves to get into the vehicle. The key chips contain unique serial codes which transmits a signal to the receiver inside your car. When the signal is received it compares it with an existing code in the car's computer. If the codes are similar then your car will begin to start. If not, it will not start at all. This is one of the main reasons to keep a spare key for your vehicle, especially in the case of a transponder-based system. car key cut and programed 'll require special equipment to learn to program keys. You'll also require an uncut key that matches your specific model and make. They can be purchased from a dealership or by a locksmith, but you must make sure that they are the correct ones. If you use a key from another model, it will not work. To start the process, you need to 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 about 10 minutes and 30 seconds. After the time has passed you can take off your key and check if the security indicator on your dashboard has gone off. If not, you'll need to repeat the process for the third time. Keep in mind that this method will only work with GM vehicles, and it's still not foolproof. If you're looking for a more reliable and secure solution, you can visit a locksmith or dealer to have the car programmed with an embedded chip. These professionals have the necessary tools and equipment to access your car's onboard diagnostics port and make the change. Keyless Entry Systems Keyless entry systems allow access to property without the need for an actual credential. They use sensors in combination with an onboard computer to provide security. It is possible to monitor and control the system from any place within the property. Keys and locks are not required. The system is also able to detect and block stolen or lost cards. Additionally, the most recent models are cloud-based and allow for remote management and configuration. Modern cars come with keyless entry systems. To accomplish this it emits radio signals that are picked up by a special key fob. The signals are compared with the code that is stored in the car's computer and, if all is well the car will be able to unlock. If the signals do not match then the car won't start. There are several steps you can follow to program your new key fob, if it isn't already programmed. You'll first need to make sure that all doors excluding the driver's door are locked. Also, you'll need the original key fob, as well as any extras you'd like to program. You can also visit your local auto parts shop, as they may have the appropriate programming tool for your car. If these steps don't work, you'll need to go through the owner's manual or a professional locksmith. Once you've got the proper tool, follow the manufacturer's instructions to begin reprogramming your key fob. The process is usually fast and easy. For instance, you may be asked to insert your new key into the ignition with all doors shut and then press the button on the key fob within a brief time. The car could respond by reversing the door locks or emitting an audible sound as a sign that the key was successfully programmed. Many locksmiths employ special tools to bypass the EEPROM security built into your car's remote or key fob. This is a risky method and can cause corruption of the data on your car's computer. It's best to have an expert handle this task, as they will be able to reduce the chance of data corruption and make sure that your keys are correctly programmed. Transponder Keys Transponder keys, sometimes 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 placed into the ignition lock barrel. The chip absorbs this energy and then sends a radio frequency signal which contains an identification number. This code is in line with the unique digital serial numbers in the computer system of the car. This stops any attempts by anyone else to start the car as only the proper keys will be able to do so. This type of technology is thought to be more secure than a conventional car key since it makes it more difficult for thieves to “hot wire” the vehicle and then start it. But it's not foolproof, and thieves have found ways to evade and thwart 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 able to program a new transponder key yourself by using a key programming device that's compatible with your particular car. The key programmer will come with a manual that will take you step-by-step through the procedure. Once you have your key and key programmer, follow the steps carefully and ensure that the security light on your dashboard is turned on prior to turning your engine ON. You can contact an expert locksmith to assist you if you are not confident using a key programmer or if you have a car with more advanced features, like remote head keys or intelligent keys. They will have the tools and equipment needed to cut an uncut key, erase the old key from the computer of the car, and then program the new key to work correctly. This will save your time and money, and will ensure that your car's security system operating as it should. It is also safer than making it yourself. If you choose the incorrect key programming software or follow unofficial guides and the data in your car's computer could be corrupted, and the new key will not work. Remotes You may have to reprogramme your car keys if they're not working. It's a straightforward process for most modern vehicles that have key fobs. However, some models are more complicated and require programming with the aid of an instrument that is available from a dealer or auto locksmith. To decrease the risk of theft from vehicles Modern car makers have improved the security of their key systems. The key system was designed to stop hot-wiring (the practice of using another vehicle's key to start the engine) and other similar methods. To ensure that this method works you'll need at least two key fobs that are working for your vehicle. This is just one of the reasons why it's a good idea to always have at least one spare key on hand. Key fobs are equipped with electronic chips that communicate using radio signals with the car's receiver. The car's computer then compares this key's code to the one in its database. If the codes are the same the car will be able to start. If the codes do not match the car won't start or will remain dead. Most of these electronic key can be programmed and replaced by an expert locksmith or auto dealer using the right equipment. If you can locate a low-cost car key programer on the internet or in an auto parts store, the procedure is fairly simple. You'll have to follow a specific sequence of steps, which includes inserting the key into the ignition and turning it on, but not running the engine, and then turning off the key. You'll need to repeat this procedure a specific number of times within a specified time frame for your vehicle to enter programming mode. The door locks will turn on and off or a chime will sound. Certain modern vehicles are only programmable with a tool connected to the onboard diagnostic port or EEPROM programming. Unfortunately, most of these tools are extremely expensive, which makes them unaffordable for most car owners. As such, most car experts recommend to consult an experienced locksmith or auto dealer for key programming services.