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How to Program a Car Key Modern cars have more than just a single key to start the engine, they also come with a remote that can lock and unlock doors. These key fobs have to be programmed in order to function. It is possible to pre-program some car keys by the owner, but it is best to consult an expert. This will ensure that there is no damage to the computer system of the car and ensure that the key works correctly. How do you program a key? Before the turn of the 21st century the majority of cars utilized basic key systems. Keys themselves were metal and had grooves that matched the internal parts of the ignition cylinder. As technology improved, more and more automobile makers began to combine physical and electronic protocols in order to prevent theft. Key systems, also known as transponder keys or chips keys are designed to make it more difficult for thieves to open the vehicle. The key chips in the keys have a specific serial number, which transmits signals to the receiver in your car. When the signal is received it compares it with an existing code in the car's computer. If the codes match, then the car will start. If not, it will not start at all. This is why you should keep an extra car key, especially if the system is based on transponders. If you're interested in learning how to program a key, you'll need some special equipment. You'll also need an uncut key for your particular model and make. You can purchase these at an auto locksmith or a locksmith dealership, but it's important to purchase the correct keys. If you attempt to use a key from an alternative model, it won't work. To start the process, you need to 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 approximately 10 minutes and 30 seconds. Once the time is up, you can remove the key and check whether the security indicator on your dashboard was gone. If it didn't then you'll need to do it again for a third time. Be car key programer that this method can only work with GM vehicles however it isn't 100% secure. If you're seeking a more secure and reliable option, you should consult a professional locksmith or the dealer to get your vehicle programmed with chips. These professionals have the tools and equipment needed to access the onboard diagnostics port of your car and make the change. Keyless Entry Systems Keyless entry systems allow property access without requiring the use of a physical ID. Security is offered by sensors that are combined with an onboard computing device. This allows you to control the system and monitor its activity from anywhere on your property, and does away with the requirement for keys or locks. The system can also detect stolen or lost cards and deactivate them. In addition, the latest models are cloud-based, allowing for remote management and configuration. Most modern cars come equipped with the keyless entry system. The system works by sending radio signals which are detected by the keyfob. The signals are compared to the code stored in the computer of the car and if everything is in order the car will start to unlock. The car will not start if the signals are not the same. There are several ways to program your new key fob, if it's not programmed yet. First, you'll need ensure that all doors are locked, except for the driver's side. You'll also require the original key fob as well as any extras you want to program. You could also check with your local auto parts shop for the right tool to program your vehicle. If none of these methods work, you'll have to consult your owner's manual or an expert locksmith. Once you have the right tool, follow the manufacturer's instructions to begin changing the program of your key fob. The process is usually simple and quick. For example, you might be directed to insert your new key into the ignition while keeping all doors closed and then press a button on the key fob within a brief time. The car may then respond by turning off the door locks or emitting a chime to signal that the key has been successfully programmed. Many locksmiths are equipped with special tools that let them bypass the built-in EEPROM security in the key fob of your car or remote. This is a risky technique and can cause corruption of the data in your car's computer. This is best left to a professional, who can reduce the risk of data corruption and ensure that your keys are properly programmed. Transponder Keys Transponder keys are also known as chip keys. They feature embedded microchips in the head of keys. When the key is inserted into the barrel of the ignition lock, and then turned to the ON position the antenna ring emits a burst of electromagnetic energy through the transponder chip. This energy is absorbed into the chip and sends back the radio frequency signal, which includes an identification code that matches with the unique digital serial number of the car's computer system. This prevents an unauthorized attempt to start the car as only the correct key will be able to start the car. This technology is believed to be more secure than traditional keys for cars because it makes it difficult for thieves to “hot wire” the vehicle and start it. It's not foolproof, and thieves have found ways to trick and defeat the system. So even cars with transponder key are not immune to theft. You could be able to program a transponder key by yourself if you have an appropriate key programmer for your vehicle. The key programmer comes with a user guide that will guide you step-by-step through the process. Once you have the key and key programmer, follow the steps carefully and ensure that the security light on your dashboard is turned ON before turning your engine ON. You can ask an expert locksmith to assist you if you're not sure about using a key programmer or if you own a car that has more advanced features, like remote head keys or intelligent keys. They will have the tools and equipment necessary to cut blank keys, erase the old key from the computer of the car, and then program the new key to work correctly. This will save you time and money and will ensure that your car's security system operating as it should. Plus, it's a lot more secure than doing it yourself! If you choose the incorrect key programming software or follow unofficial guides or instructions, the information stored in your car's system can be damaged and the new key will not work. Remotes If your car keys aren't working you may need to change the programming. This is a straightforward procedure for a lot of modern cars that use key fobs. However, some models are more complicated and must be programmed using an instrument that is available from the dealer or auto locksmith. Fortunately, the majority of modern automobile manufacturers have improved their key systems to be more secure to reduce vehicle thefts. The key system was designed to prevent hot-wiring (the practice of using a key from another vehicle to start the engine) and other similar methods. To ensure that this method works, you will require at minimum two key fobs working for your vehicle. This is one of the main reasons why it's a good idea to always have at least one spare key in your possession. The keys have electronic chips which communicate with the car's receiver using radio signals. The car's computer then compares this code on the key to the one stored in its database. If the codes match the car starts. If not, the car will not start or fail to start. Most electronic keys can be programmed and replaced by a professional locksmith or auto dealer using the right equipment. The process should be relatively simple if you can locate a key programmer that is cheap on the internet or in an auto parts store. You'll have to follow a particular sequence of steps that includes inserting the key into the ignition and turning it on, without running the engine, then turning the key off. You'll need repeat the steps a certain number of times over the timeframe you specify to put your vehicle in programming mode. This will be evident by the door locks cycling or a chime that sounds audible. Certain cars of the present can only be programmed by means of a tool connected to the diagnostics port on the car's motherboard or an EEPROM programming process. Unfortunately, most of these devices are very expensive, which makes them unaffordable for most car owners. The majority of car experts recommend consulting a reputable auto dealership or locksmith to program your keys.