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How to Program a Car Key Modern cars come with more than a key to start the engine, they also have a remote that can lock and unlock doors. These key fobs must be programmed in order to function. Certain keys for cars can be preprogrammed by the owner, however it's best to consult with a professional. This will help avoid any damage to the computer system, and also ensure that the new key functions correctly. How do you program the key Prior to the beginning of the 21st century, most cars used basic key systems. The keys themselves were metal and featured grooves that were connected to the internal parts of the ignition cylinder. As technology improved the number of car makers began to mix electronic and physical protocols to avoid theft. Key systems also known as transponder keys or chips keys, are designed to make it more difficult for thieves to start an automobile. The key chips that are in the keys have a unique serial number that transmits an electronic signal to the receiver inside of your car. The signal is then compared to a code in the computer of the car when it is received. If the codes are similar then your car will start. If the codes aren't compatible, your vehicle won't start at all. This is one of the primary reasons you should keep a spare key for your vehicle, especially in the case of a transponder-based system. You'll require special equipment to be able to program keys. You'll need to buy an uncut key that matches the model and make of your car. They can be bought at an auto dealership or from locksmiths, but you must make sure that they are the right ones. If you attempt to use a key that is from an alternative model, it will not work. To begin the process, simply insert the new key into the ignition and turn 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 has expired, you can remove your key and see if the security indicator on your dashboard has gone out. If program car key didn't, you will need to repeat the procedure a third time. Be aware that this method will only work on GM vehicles but it's not completely secure. If you're looking for a secure and reliable solution, you can visit an auto locksmith or dealer to have the car programmed using an embedded chip. They have the tools and equipment needed to access your car's onboard diagnostics port and then make the change. Keyless Entry Systems Keyless entry systems allow property access without the requirement for an actual credential. They use sensors in conjunction with an onboard computer for security. This lets you manage the system and monitor activities from any place on your property, and it removes the need for locks or keys. The system can also identify and disable stolen or lost cards. The newest models also allow remote management and configuration as well as are cloud-based. Most modern cars come equipped with the keyless entry system. The system works by emitting radio signals that are picked up using a special keyfob. The signals are then compared to the code stored in the car's computer and, if all is in order the car will start to unlock. If the signals do not match and the car does not start. There are several steps you can take 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 also need the original key fob and any other accessories you'd like to program. You could also check with your local auto parts store, as they may have the appropriate programming tool for your vehicle. If these steps don't work, you'll have to consult the owner's manual or an expert locksmith. Once you have the right tool You can begin the process of reprogramming your key fob following the manufacturer's instructions. This procedure is usually quick and simple. You may be instructed to put the new key in the ignition while all doors are closed and then press the button on the keyfob within a specific time. The car might respond by cycling door locks or emitting an audible chime, which is a sign that the key was successfully programmed. A lot of locksmiths have tools that allow them to bypass the built-in EEPROM security on the key fob of your car or remote. This is a risky technique and could cause data corruption stored in the car's computer. This is best left to a professional who can minimize the risk of data corruption and make sure that your keys are programmed correctly. Transponder Keys Transponder keys are also known as chip keys. They feature a microchip embedded in the head of keys. The antenna ring transmits electromagnetic energy to the transponder whenever the key is placed into the ignition lock barrel. The chip absorbs this energy, and then transmits a radio frequency signal that contains an identification code. This code is in line with the unique digital serial numbers of the car's computers. This prevents unauthorized attempts to start the car, as only the correct key can perform the task. This type of technology is thought to be more secure than a conventional car key since it makes it difficult for a thief “hot wire” the vehicle to start it. It's not foolproof, and thieves have found ways of tricking and defeating the system. So even cars with transponder key are not safe from theft. You might be able to program a transponder key on your own with an appropriate key programmer for your vehicle. The key programmer will come with a manual that walks you step-bystep through the process. Once you have your key and key programmer, follow the directions carefully and make sure the security light on your dashboard is ON before turning your engine ON. If you're not comfortable with the use of a key programmer or if your vehicle has more advanced features like remote head keys or smart keys, you can go to a professional locksmith assistance. They'll have the appropriate tools and equipment to cut your blank key, erase your old one from the computer in the car and then program the new key to ensure that it functions correctly. This will help you save money and time and ensure that your car's safety system functioning exactly as it should. It's also a lot safer than trying to do it yourself! Utilizing the wrong key programming software or following unofficial instructions could alter the information stored in the vehicle's system and result in your new key not working. Remotes It is possible to change the programming of your car keys if they aren't working. It's a straightforward process for most modern vehicles which use keyfobs. However, certain models are more complicated and need to be programmed with the help of an additional device that's typically available from the dealer or auto locksmiths. Fortunately, the majority of modern automobile manufacturers have made their key systems more secure in order to decrease the risk of theft from vehicles. The key system was designed to stop hot-wiring (the method of using the key of another vehicle to start the engine) and other similar methods. To make this process work you'll need at least two key fobs that are functioning for your vehicle. This is just one of the reasons why it's a good idea to always have at least one spare key on hand. The keys have electronic chips inside them which communicate with the car's receiver using radio signals. The computer checks the key's code with the database. If the codes are the same, the car will start. If not, the car will be dead or refuses to start. Most of these electronic key can be programmed and replaced by an expert locksmith or auto dealer with the right equipment. If you can find a low-cost car key programer on the internet or at an auto parts store, the process will be relatively simple. You'll have to follow a particular sequence of steps that includes inserting the key into the ignition and turning it on, but not starting the engine, then turning the key off. You will need repeat the steps a specified number of times in an exact time period to get your vehicle into programming mode. This will be evident by the door locks chiming or a chime that sounds audible. Some modern vehicles are capable of being programmed using a tool that is connected to the onboard diagnostic port or EEPROM programming. These tools are expensive and therefore unaffordable by most car owners. The majority of car experts recommend consulting an experienced auto dealer or locksmiths to program your keys.