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How to Program a Car Key Modern cars come with more than a key that can start the engine. They also have a remote control that allows you to lock or unlock doors. These key fobs need to be programmed to work properly. It is possible to program some car keys by the owner, however it is advised to consult an expert. This will prevent any damage to the computer system of the car and ensure that the key functions correctly. How do you program a key Prior to the beginning of the 21st century the majority of cars utilized basic key systems. The keys themselves were metal and had grooves that matched the internal parts of the ignition cylinder. As time passed and technology improved as it did, automobile manufacturers began to combine electronic and physical protocols to prevent theft. These key systems are called transponder keys or chip keys and are designed to make it difficult for thieves to start the vehicle. The key chips contain a unique serial code that transmits a message to the receiver in your car. When the signal is received it is compared to an existing code in the car's computer. If the codes are compatible, then the car will start. If the codes don't match, then your car won't even start. This is one of the main reasons you should keep a spare key on your vehicle, particularly when you use an electronic transponder. If you're interested in learning how to program keys, you'll need certain equipment. You'll need a blank key that is compatible with the model and make of your car. You can purchase these at an auto locksmith or a locksmith dealership, but it's essential to get the right ones. If you use a key from another model, it will not function. Start the process by inserting the new key in the ignition and turning it “on”. programming car key will need to leave the new key in this position for approximately 10 minutes and 30 second. After the time has expired, you can remove the key and check if the security light on your dashboard was gone. If it didn't you'll have to do it for the third time. Be aware that this method can only work on GM vehicles, and it's still not completely secure. If you're looking for a more secure and reliable option then you should visit an auto locksmith or dealer to get your vehicle programmed with an embedded chip. They are equipped with the tools and equipment required to access the onboard diagnostic port on your vehicle and make the change. Keyless Entry Systems Keyless entry systems allow access to property without the requirement of an actual credential. Security is offered by the combination of sensors and an onboard computer. It is possible to manage and monitor the system from anywhere in the property. Keys and locks are not required. The system is also able to detect and disable stolen or lost cards. The latest models also support remote management and configuration, and are cloud-based. Most modern cars are equipped with the keyless entry system. To make this work the car emits radio signals that are picked up by a special key fob. These signals are then compared against the correct code that is stored in the car's system, and if everything is in order, the car will unlock. If the signals don't match, the car will not start. There are a variety of ways to program your new key fob if it isn't already programmed. First, you'll need to make sure that all doors excluding the driver's door are locked. You'll need to have the original key fob and any other devices you wish to program. You could also check with your local auto parts store because they might have the right tool to program your vehicle. If none of these methods work, you'll have to consult the owner's manual or an expert locksmith. Once you have the right tool, you can follow the instructions of the manufacturer to begin reprogramming your key fob. This procedure is usually quick and simple. It is possible to be instructed to insert the new key in the ignition when all doors are shut, and then press the button on the keyfob after a certain time period. The car may respond by cycling doors or emitting an audible chime as an indication that the key was successfully programmed. Many locksmiths have special tools that permit them to bypass the built-in EEPROM security on the car's key fob or remote. This is a dangerous method and can corrupt the data on your car's computer. It's best to have an expert handle this task, as they will be able to minimize the risk of data corruption and also ensure that your keys are programmed correctly. Transponder Keys Transponder keys, also known as chip keys, have an embedded microchip in the head of the key. When the key is placed in the barrel of the ignition lock and turned to ON the antenna ring emits an electromagnetic energy blast through the transponder chip. This energy is absorbed by the chip and it transmits a radio frequency signal with an identification code that corresponds up to the unique serial number that is stored in the car's computer system. This stops unauthorized attempts to begin the car as only the correct keys will be able. This technology is believed to be more secure than conventional car keys because it makes it more difficult for thieves to “hot wire” an automobile and start it. It's not foolproof and thieves have found ways to evade detection and defeat the system. Therefore, even vehicles with a transponder keys aren't safe from theft. You could be able to program a transponder key by yourself when you have an appropriate key programmer for your car. The key programmer comes with a user guide that will guide you step-by-step through the procedure. Follow the directions and switch on the security light on your dashboard prior to beginning your engine. You can ask a professional locksmith to help you if you are not confident with the key programmer or you own a car that has more advanced features, such as remote head keys or intelligent keys. They will have the tools and equipment needed to cut an uncut key, erase the old one from the computer in the car, and then program the new key to function properly. This will save you time and money and will help keep your car's security system functioning just as it should. It's also a lot safer than attempting to do it yourself! Making use of the wrong key programmers or following unofficial guides can cause a problem with the information stored in your car's system, resulting in the key not functioning. Remotes If your car keys don't work, you might need to reprogram them. It's an easy process for most modern vehicles that have key fobs. Some models are more intricate and require a specific programming device, which is usually available from the dealer or through auto locksmiths. To reduce vehicle thefts Modern car manufacturers have improved the security of their key systems. The key system was designed to prevent hot-wiring, which is the act of using a key from an other vehicle to start your car's engine. To be able to make this process work you'll need at least two key fobs that are functioning for your vehicle. This is one of the reasons why it's a good idea to always have at least one spare key in your possession. Key fobs are equipped with electronic chips in them which communicate with the car's receiver via radio signals. The computer checks the key's code with the database. If the codes match the car starts. If not, the car will not start or fail to start. Most of these electronic key can be programmed and replaced by a professional locksmith or dealer in the field with the proper equipment. The process should be relatively 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 specific sequence of steps, which includes inserting the key into the ignition, turning it on, without starting the engine, and then turning the key off. You'll need repeat the steps a specified number of times over the timeframe you specify to get your vehicle into programming mode. The door locks will turn on and off or a chime will sound. Certain cars of the present can only be programmed by means of a tool that's connected to the onboard diagnostics port or an EEPROM programming process. Unfortunately, the majority of these tools are incredibly expensive, which makes them unaffordable for most car owners. So, many car experts recommend that you speak with an expert auto dealer or locksmith to program your keys.