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How to Program a Car Key Modern cars have more than just a key that can start the engine. They also come with a remote which can be used to lock or unlock doors. Key fobs need to be programmed to function. Some keys for cars can be programmed by the owner himself, but it is best to speak with a professional. This will ensure that there is no damage to the computer system of the vehicle and ensure that the key functions correctly. How do you program a key? Most cars had basic key systems prior to the turn of the 21st century. The keys were made of metal and had grooves to correspond to the internal parts of the ignition cylinder. As technology advanced, more and more car makers began to combine electronic and physical protocols in order to prevent theft. These key systems are referred to as transponder keys or chip keys and are designed to make it harder for thieves to get into the vehicle. The key chips inside the keys have a unique serial number that transmits an electronic signal to the receiver inside your car. When the signal is received it compares it with the code that is stored in the car's computer. If can a locksmith reprogram a car computer match, then the car will start. If not, it won't start at all. This is one of the primary reasons why you should always keep a spare key for your vehicle, especially if you have a transponder-based system. If you're looking to learn how to program keys, you'll need some specific equipment. You'll also need to purchase an uncut key for your specific make and model. These can be purchased at a dealership or by a locksmith, but you must make sure they're the correct ones. If you use a key that is for another model, it won't function. Start the process by inserting the new key in the ignition and turning it “on”. You'll need to keep the new key in this position for approximately 10 minutes and 30 seconds. Once the time has expired, you can remove your key and verify that the security indicator on your dashboard has gone out. If it didn't then you'll have to repeat the process for a third time. This method is only compatible with GM vehicles and it's not foolproof. If you want a more secure and reliable option go to a locksmith or a dealer to get your car programmed using an embedded chip. These professionals have the tools and equipment needed to access the onboard diagnostics port in your car and make the change. Keyless Entry Systems Keyless entry systems give access to your property without the need for a physical credential. They utilize a combination of sensors and an onboard computer to offer security. It is possible to control and monitor the system from anywhere within the property. Keys and locks are not required. The system can also identify and block stolen or lost cards. Additionally, the most recent models are cloud-based and permit remote management and configuration. The majority of modern cars are equipped with an entry system that is keyless. The system works by emitting radio signals that are detected by an specialized keyfob. The signals are compared with the code that is stored in the car's computer, and if all is well, the car will unlock. The car won't start if the signals are not identical. If your key fob is not already programmed, you can follow a few steps to program it. First, you'll need to make sure that all doors are locked, except for the driver's side. You'll also require the original key fob as well as any extras you want to program. You can also visit the local auto parts store to see if they have the right tool for your vehicle. If these steps don't work, you'll have to go through the owner's manual or an expert locksmith. Once you have the right tool, follow the instructions of the manufacturer to begin programming your key fob. This process is usually quick and simple. You may be instructed to put the new key into the ignition while all doors are closed, and then press the button on the keyfob within a specific time. The car could respond by cycling doors or emitting an audible chime, which is a sign that the key was successfully programmed. Many locksmiths use special tools to bypass the EEPROM security features that are built into the remote of your car or key fob. However, this is a risky method and could lead to the possibility of destroying the data stored on your car's computer. It is recommended to have an expert handle this because they will be able to reduce the risk of data corruption and ensure that your keys are programmed correctly. Transponder Keys Transponder keys, sometimes referred to as chip keys, come with a microchip built into the head of the key. The antenna ring transmits electromagnetic energy to the transponder when the key is inserted into the barrel of the ignition lock. This energy is absorbed by the chip and it transmits a radio frequency signal with an identification code that corresponds with the unique digital serial number in the car's computer system. This is to prevent any attempts by anyone else to start the car as only the correct keys will be able. This technology is believed to be more secure than traditional car keys because it makes it much more difficult for thieves to “hot wire” the vehicle and get it started. However, it's not foolproof and thieves have found ways to evade and defeat the system – so that even cars that have transponder keys aren't safe from theft. You may be able program a transponder key on your own when you have a key programmer compatible with your vehicle. The key programmer should include an easy-to-follow guide to walk you through the process of programming your key. Follow the instructions and switch on the security lights on your dashboard prior to beginning your engine. You can seek out 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'll have the right tools and equipment to cut your blank key, erase your old one from the computer in the car, and then program the new key so that it works correctly. This will save you money and time and ensure that your car's safety system functioning exactly as it should. Plus, it is much safer than making it yourself. If you choose the wrong key programmer or follow unofficial instructions, the information in your car's computer could be corrupted, and the new key will not function. Remotes It is possible to change the programming of your car keys if they're not working. This is a straightforward process for many modern vehicles that have key fobs. Some models are more intricate and require a specific programming device, which is normally available from the dealer or from auto locksmiths. Fortunately, many modern car manufacturers have made their key systems more secure to prevent theft of vehicles. The key system is designed to stop hot-wiring, which is using a key from a different vehicle to start your car's engine. To be able to make this process work, you will require at least two key fobs that are functioning for your vehicle. This is one of the reasons why it's best to have at least one spare key in your possession. The key fobs contain electronic chips that transmit radio signals with the car's receiver. The car's computer then compares the key's code to the one in its database. If the codes are the same the car will be able to start. If not, the car will remain dead or refuse to start. Luckily, most of these electronic keys can be repaired and programmed by an expert auto dealer or a locksmith with the right equipment. If you're able to find an inexpensive car key programmer online or at an auto parts store, the process is fairly simple. You'll have to follow a set-up which include inserting the ignition key, turning it on, without starting the vehicle, and then turning off the key. You will need to repeat the steps a certain number of times over a specified time frame to put your vehicle into programming mode. The door locks will be triggered or a chime will sound. Certain modern vehicles can only be programmed with the help of a device that is connected to the onboard diagnostics port, or an EEPROM programming procedure. The majority of these tools are costly and therefore unaffordable by most car owners. So, many car experts recommend to consult a professional auto dealer or locksmith to program your keys.