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How to Program a Car Key Modern cars come with more than just a single key to start the engine. They also come with a remote that can lock and unlock doors. Key fobs must be programmed to work properly. It is possible to pre-program some car keys by the owner, but it is recommended to speak with a professional. This will prevent any damage to the computer system of the vehicle and ensure that the key functions correctly. How to program the key Most cars had basic key systems prior to the turn of 21st century. Keys were made of metal and incorporated grooves to correspond with the internal parts in the ignition cylinder. As mobile key programming advanced the number of car makers began to combine electronic and physical protocols to avoid theft. These key systems are called transponder keys or chip keys and they're designed to make it difficult for thieves to start the vehicle. The key chips inside the keys have a unique serial number that transmits an electronic signal to the receiver in your car. The signal is compared with an identifier in the computer of the car when it is received. If the codes are compatible, then your car will begin to start. If not, it will not start at all. This is one of the primary reasons you should keep a spare key on your vehicle, especially if you have a transponder-based system. You'll need special equipment to learn to program keys. You'll need a blank key that matches your car model and make. They can be bought at the dealership or through a locksmith, but you must make sure that they are the correct ones. If you use a key that is for another model, it will not work. To begin the process, insert the new key into the ignition and turn it to the “on” position. You'll need to keep the new key in this position for about 10 minutes and 30 second. When the time has passed, you can remove the key and see if the security light on your dashboard went out. If not then you'll need to repeat the process for the third time. Keep in mind that this method will only work with GM vehicles but it's not 100% secure. If you're looking for a more secure and reliable solution, then you should visit an expert locksmith or dealer to get your vehicle programmed with chips. They have the tools and equipment needed to connect to the onboard diagnostics port of your car and make the switch. Keyless Entry Systems Keyless entry systems give property access without requiring a physical credential. Security is offered by sensors that are combined with an onboard computer. It is possible to control and monitor the system from any place within the property. Keys and locks are not required. The system is also able to detect lost or stolen cards and then deactivate them. Additionally, the most recent models are cloud-based and allow for remote management and configuration. Most modern cars come equipped with the keyless entry system. To accomplish this, the vehicle emits radio signals that are picked up by a particular key fob. These signals are then compared against the correct code stored in the car's computer, and when everything is in order the car will be able to unlock. The car will not start in the event that the signals are not identical. There are a variety of steps you can follow to program your new key fob if it's not already programmed. You'll first need to make sure that all doors, except the driver's door are locked. You'll need to have the original key fob and any extras that you want to program. You could also check with your local auto parts store, as they may have the appropriate programming tool for your vehicle. If none of these options work, you'll have to consult the owner's manual or an expert locksmith. Once you have the right tool, you can begin the reprogramming of your key fob by following the manufacturer's instructions. The process is usually simple and quick. You might be told to put the new key into the ignition when all doors are shut and then press the button on the keyfob within a certain time period. The car may then respond by adjusting the door locks or emitting a sound to indicate that the key has been successfully programmed. Many locksmiths use special tools to get around the EEPROM security features that are built into your car's remote or key fob. This is a dangerous method and can corrupt 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, sometimes referred to as chip keys, are equipped with an embedded microchip in 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, which then transmits a radio frequency signal with an identification code that matches up to the unique serial number of the car's computer system. This prevents unauthorised attempts to start the car, because only a valid key will be able to do so. This technology is thought to be more secure than the traditional car key, as it makes it difficult for a thief “hot wire” the vehicle and then start it. But it's not foolproof and thieves have discovered ways to deceive 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 able to program a new transponder key yourself by using a key programming device that's compatible with your particular car. The key programmer comes with a guide that walks you step-bystep through the procedure. Once you have your key and a key programmer, follow the directions carefully and ensure the security light on your dashboard is turned ON prior to turning the engine on. You can contact an expert locksmith to assist you if you are not sure about using the key programmer or 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 a blank key, delete the old one from the computer in the car, and program the new key to function properly. This will help you save money and time, and keep your car's safety system operating exactly as it should. It is also safer than doing it yourself. Making use of the wrong key programmers or following unofficial guides can cause a problem with the information stored in your vehicle's system and result in the key not working. Remotes You may need to reprogram your car keys if they don't work. It's a simple procedure for most modern vehicles which use keyfobs. However, certain models are more complex and require programming using a special device that's usually available from the dealer or auto locksmiths. Fortunately, many modern car manufacturers have improved their key systems to be more secure to reduce vehicle thefts. The key system is designed to prevent hot-wiring, which is the act of using a key from another vehicle to start the engine of your vehicle. To ensure that this method works you'll require at least two key fobs functioning for your vehicle. This is just one of the reasons why it's a good idea to always have at least one spare key available. The key fobs contain electronic chips that transmit radio signals to the car's receiver. The computer compares the key's code with the database. If the codes match the car will begin. If the codes don't match the car won't start or remain dead. Luckily, most of these electronic keys can be replaced and programmed by a professional locksmith or auto dealer using the appropriate equipment. The process is fairly easy if you locate a key programmer that is cheap on the internet or in an auto parts store. You'll need to follow a set of steps that include inserting the key into the ignition and turning it on, without activating the engine, and then turning the key off. You will need to repeat the steps a specified number of times in an exact time period to put your vehicle into programming mode. The door locks will cycle or chime. Some modern vehicles are capable of being programmed using a tool that is connected to the onboard diagnostic port or EEPROM programming. These tools are expensive and are therefore not affordable for most car owners. So, many auto experts suggest that you speak with a professional auto dealer or locksmith to program your keys.