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How to Program a Car Key Modern cars have more than a key to start the engine. They also include a remote to lock and unlock doors. These key fobs must be programmed in order to function. Some keys for cars can be preprogrammed by the owner, however it's best to consult with a professional. This will prevent any damage to the computer system of the car and will ensure that the key works correctly. How to program a key The majority of cars had basic keys systems up until the turn of the 21st century. Keys were made from metal and had grooves to correspond with the internal parts of the ignition cylinder. As technology advanced, more and more car manufacturers began to combine physical and electronic protocols to stop theft. These key systems are referred to as transponder keys or chip keys and they're designed to make it harder for thieves to open the vehicle. The key chips inside the keys have a specific serial number that transmits an electronic signal to the receiver in your car. When the signal is received, it compares it to an existing code in the car's computer. If the codes match, then your car will start. If not, it will not start at all. This is one of the main reasons why you should always keep a spare key on your vehicle, particularly in the case of an electronic transponder. If you're interested in learning how to program keys, you'll need some specific equipment. You'll also need to purchase a blank key for your particular make and model. They can be purchased from an auto dealership or from locksmiths but you must make sure they're the correct ones. If you use a key from another model, it won't function. To begin the process, insert the new key into the ignition and switch it to the “on” position. You'll need to leave the key in this position for around 10 minutes and 30 seconds. Once the time has expired you can take off your key and verify that the security indicator on your dashboard has gone off. If it didn't go out, you will need to repeat the process three times. Keep in mind that this method can only work with GM vehicles, and it's still not completely secure. If you want a more reliable and secure solution go to a locksmith or dealer to get your car programmed using an embedded chip. These professionals have the tools and equipment needed to connect to the diagnostics port in your car and make the switch. Keyless Entry Systems Keyless entry systems allow access to property without the need for a physical ID. They make use of a combination of sensors and an onboard computer to provide 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 disable stolen or lost cards. In addition, the newest models are cloud-based and allow for remote management and configuration. The majority of modern cars are equipped with an entry system that is keyless. To make this work the car emits radio signals which are picked up by a particular key fob. These signals are then compared to the correct code that is stored in the car's computer and if everything is in order the car will start to unlock. If the signals don't match and the car does not start. There are several ways to program your new key fob if it isn't already programmed. The first step is to make sure that all doors are locked, except for the driver's side. You'll also need the original key fob, and any other accessories you'd like to program. You can also try your local auto parts store because they might have the right tool to program your car. If these steps do not work, you'll have to go through the owner's manual or a professional locksmith. Once you have the correct tool, you can follow the manufacturer's instructions to begin programming your key fob. The process is usually quick and easy. For instance, you may be instructed to insert your new key into the ignition while keeping all doors shut and then press a button on the key fob within a short time frame. The car might then respond by turning off 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, this is an extremely risky procedure and has the potential of destroying the data on your car's computer. This should be left to a professional, who can reduce the risk of data corrupting and ensure that your keys are properly programmed. Transponder Keys Transponder keys, sometimes referred to as chip keys, have a microchip built into the head of the key. When the key is placed in the ignition lock barrel and turned to ON, the antenna ring sends an energy burst through the transponder chip. This energy is absorbed into the chip and it transmits an audio frequency signal that contains an identification code that matches up to the unique digital serial number in the car's computer system. This is to prevent unauthorized attempts to begin 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 a criminal to “hot wire” the vehicle and start it. But it's not foolproof, and thieves have found ways to evade and thwart the system which means that even cars equipped with transponder keys aren't safe from theft. You may be able program a transponder key by yourself when you have an appropriate key programmer for your car. The key programmer will come with a manual that will take you step-by-step through the process. Follow the steps and turn on the security light in your dashboard prior to beginning your engine. If you're not comfortable using a key programmer or if your car includes more advanced features such as remote head keys or smart keys, you may turn to a professional locksmith for assistance. They'll have the right tools and equipment to cut the blank key, remove your previous one from the computer in your car, and then program the new one so that it works properly. This will save you time and money, and will ensure that your car's security system operating exactly as it should. Plus, it is much safer than doing it yourself. Using the wrong key programmers or following unofficial guides can alter the information stored in the car's system, and result in your new key not working. Remotes If your car keys aren't working it could be necessary to reprogram them. It's a straightforward process for the majority of modern cars that have key fobs. Certain models are more complicated and require a specific programming device, which is normally available from the dealer or from auto locksmiths. To decrease the risk of theft from vehicles Modern car manufacturers have enhanced the security of their key systems. The key system is designed to stop hot-wiring, which is the practice of using a key from an other vehicle to start the engine of your vehicle. To be able to make this process work, you will need at least two key fobs that are functioning for your vehicle. It's essential to have two spare keys available. Key fobs are equipped with electronic chips that transmit radio signals with the car's receiver. The computer examines the key's code with the database. If the codes are the same the car will be able to start. If not, the vehicle will remain dead or refuse to start. Fortunately, the majority of electronic keys can be repaired and programmed by an expert locksmith or auto dealer equipped with the proper 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 of instructions that include inserting the ignition key and turning it on, without starting the vehicle, and then switching off the key. You'll need to repeat this a certain number of times within a certain time frame for your vehicle to enter programming mode. This is indicated by the door locks chiming or a chime that sounds audible. Some modern vehicles are capable of being programmed using a tool that is connected to the onboard diagnosis port or EEPROM programming. Most of these tools are very expensive and are therefore not affordable for the majority of car owners. The majority of car experts recommend consulting with a reputable auto dealership or locksmith to program your keys.