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How to Program a Car Key Modern cars use more than just 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 work. Certain keys for cars can be programmed by the owner themselves but it's best to consult with a professional. This will ensure that there is no damage to the computer system of the car and ensure that the key functions correctly. How do you program a key Most cars had basic key systems until the turn of the 21st century. Keys were made from metal and featured grooves that correspond to the internal parts in the ignition cylinder. However, as time progressed and technology improved as it did, automobile manufacturers began blending electronic and physical protocols to protect against theft. Key systems are also referred to as transponder keys or chips keys, are designed to make it harder for thieves to start the vehicle. The key chips contain an unique serial number which transmits a signal to the receiver inside your car. The signal is compared with a code in the computer of the car when it is received. If the codes are compatible, then your car will start. If the codes aren't compatible, your car won't even start. This is one of the primary reasons you should keep a spare key for your vehicle, especially in the case of transponder-based systems. If you're interested in learning how to program a key, you'll need certain equipment. You'll need to buy a blank key that matches the model and make of your car. You can purchase them from an auto locksmith or a locksmith dealership, but it's essential to buy the right one. If you attempt to use a key from an alternative model, it won't work. Start by inserting the new key in the ignition and turning it to “on”. You will need to leave the new key in this position for about 10 minutes and 30 second. Once the time has expired you can take out your key and verify that the security indicator on your dashboard has gone out. If it didn't you'll have to do it three times. Keep in mind that this method will only work on GM vehicles however it isn't foolproof. If you're looking for a safer and reliable option, you should seek out a professional locksmith or dealer to have your car programmed with chips. They have the tools and equipment to access the onboard diagnostic port of your car and then make the change. Keyless Entry Systems Keyless entry systems permit property access without the need for an actual credential. They make use of a combination of sensors and an onboard computer to offer security. This lets you manage the system and monitor its activity from any place on the property, and it does away with the need for keys or locks. The system is also able to detect stolen or lost cards and disable them. In car key programming , the latest models are cloud-based and allow for remote management and configuration. Most modern cars come equipped with an entry system that is keyless. To make this work it emits radio signals that are detected by a special key fob. The signals are compared with the code that is stored in the car's computer and if everything is well the car will start to unlock. The car won't start if the signals are not the same. There are a variety of ways to program your new key fob if it's not already programmed. You'll first need to be sure that all doors excluding the driver's door are locked. You'll need the original key fob and any other devices you wish to program. You can also visit the local auto parts store to determine if they carry the appropriate tool for your vehicle. If none of these options work, you will have to consult your owner's manual or an expert locksmith. Once you've got the proper tool, follow the manufacturer's instructions to begin programming your key fob. The process is typically simple and quick. It is possible to be instructed to put the new key into the ignition after closing all doors, and then press the button on the keyfob within a specific time. The car could then respond by adjusting the door locks or emitting a sound to signal that the key has been successfully programmed. A lot of locksmiths have tools that allow them to bypass the built-in EEPROM security in the car's key fob or remote. However, this is an extremely risky option and could lead to the possibility of corrupting the data on your car's computer. This should be left to a professional who can minimize the risk of data corruption and ensure that your keys are programmed correctly. Transponder Keys Transponder keys are also referred as chip keys. They feature an embedded microchip inside the head of the keys. reprogram car key transmits electromagnetic energy to the transponder whenever the key is placed in the barrel of the ignition lock. This energy is absorbed into the chip and sends back the radio frequency signal, which includes an identification code that is matched up to the unique digital serial number of the car's computer system. This stops any attempts by anyone else to start the car since only proper keys will be able to do so. It is believed that this technology will be more secure than traditional keys for cars because it makes it difficult for thieves to “hot wire” an automobile and get it started. It's not foolproof, and thieves have discovered ways to trick and defeat the system. So even cars equipped with transponder keys aren't protected from theft. Depending on the make and model of your car, you may be in a position to program a brand new transponder key yourself with a key programer that is compatible with your specific car. The key programmer should include an easy-to-follow guide to walk you through the process of programming your key. Follow the directions and turn on the security lights on your dashboard prior to beginning your engine. If you're not comfortable the use of a key programmer or if your vehicle comes with more advanced features, such as remote head keys or smart keys, you can turn to a professional locksmith for help. They will have the tools and equipment necessary to cut blank keys, erase the old one from the computer in the car, and then program the new key for it to work correctly. This will help you save money and time, and keep your car's safety system operating just as it should. It is also safer than making it yourself. If you use the wrong key programmer or follow unofficial instructions and the data in your car's system can be corrupted and the new key will not function. Remotes You may need to reprogram your car keys if they aren't working. This is an easy procedure for a lot of modern cars that utilize key fobs. Some models are more complex and require a specific programming device, which is typically available at the dealer or through auto locksmiths. Fortunately, many modern car manufacturers have made their key systems more secure in order to reduce vehicle thefts. The key system is designed to stop hot-wiring, which is using a key from another vehicle to start the engine of your car. To make this process work you'll require at least two key fobs that are functioning for your vehicle. It is essential to have at minimum two spare keys available. The key fobs have electronic chips that communicate with the car's radio via radio signals. The car's computer then compares this key's code with the one in its database. If the codes match the car starts. If not, the vehicle 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 appropriate equipment. If you can locate a cheap car key programmer on the internet or in an auto parts store, the process will be relatively simple. You'll need to follow a set of steps that include inserting the key into the ignition, turning it on, but not running the engine, then turning off the key. You'll need to repeat this procedure a specific number of times within a certain time frame for your vehicle to enter programming mode. This will be indicated by the door locks chiming or a chime that sounds audible. Certain cars of the present can only be programmed by means of a tool connected to the onboard diagnostics port, or an EEPROM programming process. Unfortunately, most of these tools are extremely expensive, which makes them unaffordable for most car owners. The majority of car experts recommend consulting a professional auto dealership or locksmiths to program your keys.