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How to Program a Car Key Modern cars come with more than a key to start the engine, they also come with a remote that can lock and unlock doors. Key fobs need to be programmed in order to work. Certain keys for cars can be programmed by the owner, however it is recommended to consult a professional. This will prevent any damage to the computer system of the vehicle and ensure that the key functions correctly. How to Program a Key Prior to the beginning of the 21st century most cars used basic key systems. The keys themselves were just metal and featured grooves that corresponded to the internal components of the ignition cylinder. As technology advanced, more and more car makers began to mix physical and electronic 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 open the vehicle. The key chips come with unique serial codes that transmits a message to the receiver in your car. The signal is compared with an identifier in the car's computer when it is received. If the codes are similar the car will begin to begin to start. If the codes don't match, your vehicle won't start at all. This is why it is important to keep an extra car key, particularly if your system is based on transponders. You'll require specialized equipment to learn how to program keys. You'll also need to purchase a blank key for your particular model and make. They can be bought at an auto dealership or from a locksmith but you must make sure that they are the right ones. If you use a key for another model, it won't function. Begin by putting the new key into the ignition and turning it to “on”. You'll need to leave the key in this position for approximately 10 minutes and 30 seconds. Once the time is up you can take off the key and check whether the security light on your dashboard went out. If not then you'll have repeat the process another time. This method is only compatible with GM vehicles, and isn't completely secure. If transponder key programming seeking a more secure and reliable method, you should seek out an expert locksmith or dealer to have your car programmed with chips. They have the tools and equipment needed to access the diagnostic port on your car's motherboard and make the change. Keyless Entry Systems Keyless entry systems allow access to properties without the requirement of a physical credential. Security is offered by a combination between sensors and an onboard computer. This allows you to control the system and monitor activities from any place on the property, and it removes the need for locks or keys. The system can also detect and disable stolen or lost cards. The most recent models also permit remote management and configuration and are cloud-based. Most modern cars come equipped with an entry system that is keyless. The system works by sending radio signals that are picked up using a special keyfob. The signals are compared with the code that is stored in the computer of the car, and if all is well the car will start to unlock. The car won't start in the event that the signals are not the same. There are a variety of steps you can take to program your new key fob, if it's not already programmed. First, you'll need to make sure that all doors are locked, except for the driver's side. You'll also need the original key fob along with any additional keys you'd like to program. You may also visit your local auto parts store to determine if they carry the appropriate tool for your car. If none of these methods work, you'll need consult the owner's manual or an expert locksmith. Once you have the correct tool, you can begin the process of reprogramming your key fob by following the manufacturer's instructions. The process is typically quick and easy. For instance, you may be instructed to insert your new key into the ignition with all doors shut and then press the button on the key fob within a very short time period. The car might then respond by turning off the door locks or emitting a chime to indicate that the key was successfully programmed. A lot of locksmiths have tools that permit them to bypass the built-in EEPROM security on the car's key fob or remote. However this is a risky method and could lead to the possibility of destroying the data on the computer in your car. It is recommended to have an expert handle this task, as they will be able to reduce the chance of data corruption and also ensure that your keys are programmed correctly. Transponder Keys Transponder keys are also referred as chip keys. They are equipped with a microchip embedded in the head of keys. The antenna ring transmits electromagnetic energy to the transponder when the key is placed into the ignition lock barrel. The energy is absorbed by the chip and it transmits the radio frequency signal, which includes an identification code that is matched with the unique serial number of the car's computer system. This prevents an unauthorized attempt to start the car because only a valid 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 more 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 keys aren't immune to theft. You may be able program a transponder key yourself if you have a key programmer compatible with your vehicle. The key programmer should come with a step-by-step guide that will walk you through the procedure of programming your key. Follow the directions and switch on the security light on your dashboard prior to starting your engine. You can ask a professional locksmith to help you if you are not confident with a key programmer or if you have a car with more advanced features, like remote head keys or intelligent keys. They'll have the tools and equipment necessary to cut an uncut key, erase the old one from the computer of the car, and then program the new key to function properly. This will save your time and money, and will keep your car's security system working exactly as it should. Additionally, it's much safer than doing it yourself. Utilizing the wrong key programming software or following unofficial guidelines could cause a problem with the information stored in your car's system, resulting in your new key not functioning. Remotes If your car keys don't work you may need to reprogram them. This is a simple procedure for a lot of modern vehicles that have key fobs. Certain models are more complicated and require a specific programming device, which is normally available from the dealer or through auto locksmiths. To reduce vehicle thefts Modern car manufacturers have enhanced the security of their key systems. The key system is designed in a way to avoid hot-wiring which is using a key from a different vehicle to start your car's engine. This means that you'll require at least two working key fobs for your vehicle in order to make the process work. It is essential to have at least two spare keys on hand. Key fobs are equipped with electronic chips inside them which communicate with the car's receiver using radio signals. The computer compares the code of the key with the database. If the codes match the car starts. If not, the car will remain dead or refuse to start. Most of these electronic key can be programmed and replaced by a professional locksmith or auto dealer with the appropriate equipment. If you can locate a cheap car key programmer on the internet or at an auto parts store, the procedure will be relatively simple. You'll have to follow a sequence of steps, which includes inserting the key into the ignition, turning it on, without starting the engine, then turning the key off. You'll need to repeat the steps a specific number of times over a specified time frame to put your vehicle into programming mode. The door locks will cycle or a chime will sound. Some modern vehicles are programmable with a tool connected to the onboard diagnostic port or EEPROM programming. These tools are very expensive and therefore are not accessible to the majority of car owners. The majority of car experts recommend consulting with an experienced auto dealer or locksmith to program your keys.