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How to Program a Car Key Modern cars come with more than just a key that can start the engine. They also have a remote control that can lock or open doors. Key fobs need to be programmed in order to function. Certain keys for cars can be programmed by the owner themselves but it is best to speak with a professional. This will prevent any damage to the computer system of the car and will ensure that the key is working properly. How to Program a Key Up until the turn of the 21st century most cars used basic key systems. Keys were made from metal and incorporated grooves to correspond with the internal parts of the ignition cylinder. As technology advanced, more and more automobile makers began to mix electronic and physical protocols in order to prevent theft. These key systems are known as transponder keys or chip keys, and they're designed to make it difficult for thieves to get into the vehicle. The key chips contain a unique serial code that sends a message to the receiver inside your car. When the signal is received it compares it with the code that is stored in the car's computer. If the codes match, the car will start. If the codes don't match, your car won't even start. This is why you should keep a spare car key, particularly if your system is based on transponders. You'll require special equipment to learn to program keys. You'll also require the blank key for your specific make and model. 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 another brand, it won't work. Start the process by inserting the new key into the ignition and turning it to “on”. You'll need to keep the new key in this position for around 10 minutes and 30 seconds. When the time has passed you can take off the key and check whether the security indicator on your dashboard went out. If it didn't go out, you will need to repeat the procedure for the third time. This method is only compatible with GM vehicles and it's not foolproof. If you're looking for a more secure and reliable option, you can visit a locksmith or a dealer to get your car programmed using an embedded chip. These professionals have the tools and equipment needed to connect to the onboard diagnostic port on your car and perform the switch. Keyless Entry Systems Keyless entry systems allow access to properties without the need for a physical credential. Security is provided by a combination between sensors and an onboard computing device. This lets you control the system and monitor its activity from any location within the property, and removes the requirement for locks or keys. The system can also detect stolen or lost cards and disable them. The most recent models also permit remote management and configuration as well as are cloud-based. Modern cars are equipped with keyless entry systems. This system works by emitting radio signals which are picked up using a special keyfob. The signals are compared with the code stored in the computer of the car and, if all is well the car will start to unlock. The car will not start if the signals are not identical. If your key fob has not been already programmed, you can follow a few steps to program it. First, you'll need ensure all the doors are locked, with the exception of the driver's side. Also, you'll need the original key fob, along with any additional keys you'd like to program. program a car key can also try your local auto parts store because they might have the right programming tool for your car. If these steps don't work, you'll need to check the owner's manual, or a professional locksmith. Once you've got the proper tool, follow the manufacturer's instructions to begin reprogramming your key fob. The process is typically quick and easy. For instance, you could be instructed to insert your new key into the ignition with the doors shut, and then press an appropriate button on the fob within a very short time period. The car might then respond by cycling the door locks or generating a chime to signal that the key has been successfully programmed. Many locksmiths have special tools that permit them to bypass the built-in EEPROM security in the key fob of your car or remote. However, this is an extremely risky procedure and could lead to the possibility of destroying the data stored on your car's computer. This is best left to a professional, who can lower the chance of data corruption and make sure that your keys are programmed correctly. Transponder Keys Transponder keys are also referred as chip keys. They are equipped with an embedded microchip in the head of the keys. When the key is inserted into the barrel of the ignition lock and turned to ON the antenna ring emits a burst of electromagnetic energy through the transponder chip. The energy is absorbed by the chip and sends back the radio frequency signal, which includes an identification code that corresponds up to the unique serial number of the car's computer system. This prevents unauthorized attempts to start the car as only the correct key will be able to perform the task. The technology is believed to be more secure than traditional keys for cars because it makes it much harder for a thief to “hot wire” an automobile and start it. It's not foolproof, and thieves have discovered ways to evade detection and defeat the system. Therefore, even vehicles with a transponder key are not safe from theft. You could be able to program a transponder key by yourself with an instrument that works with your vehicle. The key programmer will come with an easy-to-follow guide to guide you through the procedure of programming your key. Follow the instructions and turn on the security light on your dashboard prior to starting your engine. You can contact a professional locksmith to help you if you're not sure about using a key programmer or if you own a vehicle with more advanced features, like remote head keys or intelligent keys. They'll have the tools and equipment needed to cut an uncut key, erase the old key from the computer of the car, and program the new key for it to function correctly. This will save your time and money, and will keep your car's security system working exactly as it should. Plus, it is much safer than making it yourself. Making use of the wrong key programmers or following unofficial guidelines could alter the information stored in the car's system, and result in the key not functioning. Remotes It is possible to change the programming of your car keys if they're not working. It's an easy process for most modern vehicles that have key fobs. However, certain models are more complicated and need to be programmed using an instrument that is available from a dealer or auto locksmiths. Fortunately, the majority of modern automobile manufacturers have improved their key systems to be more secure in order to reduce vehicle thefts. The key system is designed to avoid hot-wiring (the method of using the key of another vehicle to start the engine) and other similar methods. To ensure that this method works you'll require at least two key fobs that are functioning for your vehicle. This is just one of the reasons why it's recommended to have at least one spare key in your possession. Key fobs are equipped with electronic chips inside them which communicate with the car's radio via radio signals. The car's computer then compares the code on the key to the one in its database. If the codes match the car will begin. If not, the vehicle will be dead or refuses to start. Luckily, most of these electronic keys can be repaired and programmed by an experienced locksmith or an auto dealer with the right equipment. The procedure should be fairly easy if you find a low-cost key programmer on the internet or at an auto parts store. You'll need to follow a sequence of steps that includes inserting the key into the ignition, turning it on, but not activating the engine, and then turning off the key. You will need to repeat the steps a specific number of times in an exact time period to get your vehicle into programming mode. This is indicated by the door locks cycling or a chime that sounds audible. Certain modern vehicles can only be programmed with the aid of a tool connected to the diagnostics port on the car's motherboard or an EEPROM programming process. Unfortunately, most of these tools are incredibly expensive, and therefore unattainable for most car owners. Many experts in the field recommend consulting an experienced auto dealer or locksmiths to program your keys.