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How to Program a Car Key Modern cars have more than just a key which starts the engine. They also have a remote control that allows you to lock or unlock doors. These key fobs must be programmed in order to function. Some keys for cars can be programmed by the owner, however it's best to consult with a professional. This will prevent any damage to the computer system of the vehicle and ensure that the key functions correctly. How do you program a key The majority of cars had basic keys systems until the turn of the 21st century. The keys were made of metal and had grooves to match the internal components in the ignition cylinder. However, as time progressed and technology improved as it did, automobile manufacturers began to combine physical and electronic protocols to prevent theft. Key systems, also known as transponder keys or chips keys, are designed to make it difficult for thieves to open an automobile. The key chips contain an unique serial number that sends a message 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 are compatible, then your car will begin to start. If the codes aren't compatible, your vehicle won't start at all. This is one of the main reasons you should keep a spare key in your car, especially in the case of transponder-based systems. If you're looking to learn how to program keys, you'll require certain equipment. You'll also need an uncut key for your specific model and make. You can purchase these at the locksmith shop or at a car dealership, but it's essential to get the right ones. If you try to use a key from an alternative model, it will not work. To begin the process, insert the new key into the ignition and switch it to the “on” position. It is necessary to leave the new key in this position for about 10 minutes and 30 second. After the time has expired you can take out the key and observe whether the security light on your dashboard went out. If it did not, you will need to do it a third time. Be aware that this method can only work with GM vehicles, and it's still not 100% secure. If you're seeking a more secure and reliable solution, then you should seek out an expert locksmith or dealer to get your vehicle programmed with chips. These professionals have the necessary tools and equipment to access the diagnostic port on your car's motherboard and make the change. Keyless Entry Systems Keyless entry systems grant property access without the requirement of a physical credential. Security is provided by a combination between sensors and an onboard computer. It is possible to control and monitor the system from any place within the property. Keys and locks are not required. The system can also identify stolen or lost cards and deactivate them. 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. To make this work the car emits radio signals that are detected by a special key fob. The signals are then compared against the correct code in the car's system, and when everything is in order the car will be able to unlock. If the signals do not match then the car won't start. There are a variety of steps you can take to program your new key fob, if it's not already programmed. The first step is to make sure that all doors are locked, except for the driver's side. You'll also need the original key fob, and any other accessories you want to program. You could also check with the local auto parts store because they might have the right tool to program your car. If these steps don't work, you'll have to consult the owner's manual or a professional locksmith. Once you have the correct tool, you can follow the instructions of the manufacturer to begin programming your key fob. This process is often relatively simple and quick. It is possible to be instructed to insert the new key into the ignition while all doors are closed and then press the button on the keyfob after the time frame. The car may then respond by turning off the door locks or emitting a chime to indicate that the key was successfully programmed. Many locksmiths have special tools that allow them to bypass the built-in EEPROM security in the car's key fob or remote. However it's an extremely risky procedure and has the potential of destroying the data stored on your car's computer. It is recommended to have a professional handle this, as they will be able to reduce the chance of data corruption and ensure your keys are properly programmed. Transponder Keys Transponder keys, also known as chip keys, have an embedded microchip in the head of the key. The antenna ring transmits electromagnetic energy to the transponder when the key is put into the ignition lock barrel. This energy is absorbed by the chip, which then transmits an audio frequency signal that contains an identification code that matches with the unique serial number in the car's computer system. This is to prevent unauthorized attempts to begin the car, as only right keys can be used. This technology is believed to be more secure than traditional car keys because it makes it much more difficult for thieves to “hot wire” a vehicle and start it. However, it's not foolproof and thieves have found ways to trick and defeat the system – so that even vehicles that have transponder keys aren't immune from theft. You could be able to program a transponder key yourself with a key programmer compatible with your car. The key programmer will come with a manual that will take you step-by-step through the process. Once you have your key and key programmer, follow the steps carefully and ensure the security light on your dashboard is ON prior to turning the engine on. You can ask a professional locksmith to help you if you are not confident with a key programmer or if you own a car that has more advanced features, such as remote head keys or intelligent keys. They'll have the tools and equipment required to cut blank keys, erase the old one from the computer of the car, and program the new key to function properly. This will save your time and money, and will ensure that your car's security system functioning exactly as it should. Plus, it is much safer than doing it yourself. Making use of the wrong key programmers or following unofficial guidelines could cause a problem with the information stored in your car's system, and result in the key not functioning. Remotes If your car keys aren't working you may need to reprogram them. This is a simple process for many modern vehicles that have key fobs. However, certain models are more complex and must be programmed with the aid of an additional device that's typically available from the dealer or auto locksmiths. Fortunately, most modern car manufacturers have made their key systems more secure in order to reduce vehicle thefts. The key system was designed to avoid hot-wiring (the method of using the key of another vehicle to start the engine) and other similar methods. As smart key programming G28 , you'll require at least two working key fobs for your vehicle to ensure that the process works. 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 key fobs have electronic chips inside them which communicate with the car's radio via radio signals. The computer in the car then compares the key's code with the one stored in its database. If the codes match, the car will start. If the codes do not match the car won't start or remain dead. The majority of these electronic keys can be programmed and replaced by an experienced locksmith or dealer in the field with the right equipment. If you can locate an inexpensive car key programmer on the internet or at an auto parts store, the process should be fairly straightforward. You'll have to follow a specific set of steps that include inserting the key into the ignition and turning it on, but not starting the engine, then turning the key off. You'll need to repeat this procedure a specific number of times within a specified time frame for your vehicle to enter programming mode. This will be evident by the door locks chiming or an audible chime. Some modern cars are only capable of programming using a device connected to the onboard diagnostic port or EEPROM programming. Unfortunately, most of these tools are extremely expensive, which makes them unaffordable for the majority of car owners. Most car experts recommend consulting a reputable auto dealership or locksmiths to program your keys.