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How to Program a Car Key Modern cars have more than just a key that starts the engine. They also come with a remote which can be used to lock or unlock doors. Key fobs must be programmed to work properly. It is possible to pre-program certain car keys by the owner, but it is advised to consult an expert. This will help prevent any possible damage to the computer system and also ensure that the new key is working correctly. How to program a key Most cars had basic key systems prior to the turn of the 21st century. The keys themselves were metal and had grooves that were connected to the internal parts of the ignition cylinder. As time went on and technology advanced, more and more automobile manufacturers began to combine physical and electronic protocols to stop theft. These key systems are called transponder keys or chip keys and are designed to make it difficult for thieves to get into the vehicle. The key chips inside the keys have a unique serial number, which transmits an electronic signal to the receiver inside of your car. When the signal is received it compares it with a code stored in the car's computer. If the codes are similar, your car will start. If the codes don't match, your car will not even start. This is one of the main reasons why you should always keep a spare key on your vehicle, particularly when you use an electronic transponder. If you want to learn how to program keys, you'll require some specific equipment. You'll also require the blank key that matches your specific model and make. They can be purchased from the dealership or through 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 work. To begin the process, simply insert the new key into the ignition and switch it to the “on” position. You'll need to keep the new key in this position for around 10 minutes and 30 second. After the time is up you can take out your key and see if the security indicator on your dashboard has gone off. If it didn't then you'll have repeat the process a third time. This method is only compatible with GM vehicles and it's not 100% secure. If you're looking for a more secure and reliable method, you should consult a professional locksmith or the dealer to have your car programmed with chip. They have the tools and equipment needed to access the diagnostic port on your car's motherboard and make the switch. Keyless Entry Systems Keyless entry systems provide property access without requiring an actual credential. They utilize sensors in combination with an onboard computer to provide security. This lets you manage the system and monitor activities from anywhere on the property, and it does away with the need for locks or keys. The system can also detect and disable stolen or lost cards. In addition, the newest models are cloud-based and permit remote management and configuration. Modern cars are equipped with keyless entry systems. The system works by sending radio signals which are detected by the keyfob. The signals are compared with the code stored in the computer of the car and if everything is well the car will be able to unlock. The car won't start in the event that the signals are not identical. There are several steps you can follow to program your new key fob if it isn't already programmed. 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, along with any additional keys you'd like to program. You may also visit your local auto parts store to determine if they carry the appropriate tool for your car. If these steps don't work, you'll need go through the owner's manual or an expert locksmith. Once you have the right tool You can begin the reprogramming of your key fob following the manufacturer's instructions. This process is often relatively simple and quick. For instance, you could be asked to insert your new key into the ignition with all doors closed and then press the button on the key fob within a very short time period. G28 may then respond by cycling the door locks or emitting a chime to indicate that the key has been successfully programmed. Many locksmiths have special tools that allow them to bypass the built-in EEPROM security in the key fob of your car or remote. But this is an extremely risky procedure and has the potential of destroying the data on your car's computer. It's best to have an expert handle this as they'll be able to minimize the risk of data corruption and ensure that your keys are programmed correctly. Transponder Keys Transponder keys, sometimes referred to as chip keys, have a microchip built into the head of the key. The antenna ring transmits electromagnetic energy to the transponder whenever the key is inserted in the barrel of the ignition lock. The chip absorbs this energy and then transmits a radiofrequency signal that contains an identification code. The code is matched to the unique serial numbers in the computer of the car. This will prevent any unauthorised attempts to start the car because only a valid key can start the car. The technology is believed to be more secure than the traditional car key, as it makes it harder for a thief “hot wire” the vehicle to start it. However, it's not foolproof and thieves have discovered ways to trick and defy the system – which means that even cars equipped that have transponder keys aren't immune from theft. Depending on the brand and model of your vehicle, you may be in a position to program a brand new transponder key yourself by using a key programming device that's compatible with your specific car. The key programmer will come with a guide that will take you step-by-step through the process. Once you have the key and a key programmer, follow the instructions carefully and make sure the security light on your dashboard is on prior to turning your engine on. You can ask an expert locksmith to assist you if you are not confident using a key programmer or if you own a vehicle with more advanced features, like remote head keys or intelligent keys. They will have the tools and equipment required to cut blank keys, erase the old one from the computer in the car, and then program the new key for it to function properly. This will save you money and time and ensure that your car's safety system functioning just as it should. It's also a lot more secure than doing it yourself! Using the wrong key programmers or following unofficial guidelines could alter the information stored in the car's system, and result in the key not functioning. Remotes If your car keys don't work it could be necessary to reprogram them. It's a straightforward process for most modern vehicles that use keyfobs. Some models are more complex and require a specific programming device, which is typically available at the dealer or through auto locksmiths. Fortunately, the majority of modern automobile manufacturers have improved their key systems to be more secure to prevent theft of vehicles. The key system is designed to stop hot-wiring (the method of using another vehicle's key to start the engine) and other similar methods. To be able to make this process work you'll require at minimum two key fobs that are working for your vehicle. This is just one of the reasons why it's best to have at least one spare key on hand. The keys have electronic chips in them that communicate with the car's radio via radio signals. The computer checks the key's code with the database. If the codes are the same the car will be able to start. If not, the car will not start or fail to start. Fortunately, the majority of electronic keys can be repaired and programmed by a professional locksmith or an auto dealer using the appropriate equipment. The process should be relatively easy if you find a low-cost key programmer on the internet or in an auto parts store. You'll have to follow a set-up which include inserting the ignition keys, turning it on without starting the vehicle, then shutting off the key. You will need to repeat the steps a specific number of times in a specified time frame to get your vehicle into programming mode. This will be evident by the door locks turning or a chime that sounds audible. Certain modern vehicles can only be programmed with the aid of a tool that's 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. Many experts in the field recommend consulting a professional auto dealership or locksmith to program your keys.