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How to Program a Car Key Modern cars come with more than a key that will start the engine. They also come with a remote that allows you to lock or open doors. Key fobs need to be programmed to work. Certain keys for cars can be preprogrammed by the owner themselves but it is recommended to consult a professional. This will ensure that there is no damage to the computer system of the car and will ensure that the key is working correctly. How to program a Key Most cars had basic key systems until the turn of 21st century. Keys themselves were metal with grooves that matched the internal components of the ignition cylinder. As time passed and technology improved and improved, automobile manufacturers began to combine physical and electronic protocols to protect against theft. These key systems are called transponder keys or chip keys, and are designed to make it harder for thieves to get into the vehicle. The key chips in the keys have a unique serial number that transmits a signal to the receiver inside of your car. When the signal is received it is compared to an existing code in the car's computer. If the codes are compatible, then the car will start. If not, it won't start at all. This is one of the primary reasons to keep a spare key in your vehicle, especially if you have a transponder-based system. If you're interested in learning how to program a key, you'll need some special equipment. You'll need to buy a blank key that matches the car's model and make. You can purchase them from an auto locksmith or a locksmith dealership, but it's essential to get the right ones. If you try to use a key that is from an alternative model, it will not work. Start by inserting the new key in the ignition and turning it to “on”. It is necessary to leave the new key in this position for approximately 10 minutes and 30 seconds. After the time has expired you can take out the key and observe whether the security indicator on your dashboard went out. If it didn't go out then you'll need to repeat the process three times. This method is only compatible with GM vehicles and isn't foolproof. If you want a more secure and reliable option, you can visit a locksmith or dealer to get your vehicle programmed with an embedded chip. They will have the tools and equipment to access your car's onboard diagnostics port and make the switch. Keyless Entry Systems Keyless entry systems give access to your property without the need for the use of a physical ID. They make use of sensors in conjunction with an onboard computer to provide security. This allows you to control the system and monitor its activity from any place on your property, and it does away with the requirement for keys or locks. The system is also able to detect and deactivate lost or stolen cards. The most recent models also permit remote management and configuration, and are cloud-based. Most modern cars are equipped with an entry system that is keyless. To accomplish this the car emits radio signals that are detected by a specific key fob. The signals are compared with the code that is stored in the computer of the car and if everything is well the car will start to unlock. If the signals do not match then the car won't start. If your key fob is not already programmed, you can follow a few steps to program it. You'll first need to make sure that all doors, except the driver's door are locked. You'll also require the original key fob along with any additional keys you'd like to program. You can also visit the local auto parts store because they might have the right tool to program your vehicle. If these steps do not work, you'll have to go through the owner's manual or a professional locksmith. Once you've got the proper tool, follow the manufacturer's instructions to begin changing the program of your key fob. The process is typically quick and easy. It is possible to be instructed to put the new key into the ignition while all doors are closed and then press the button on the keyfob within the time frame. The car may respond by reversing the door locks or emitting an audible chime, which is a sign that the key has been successfully programmed. A lot of locksmiths utilize special tools to get around the EEPROM security features that are built into your car's remote or key fob. But it's a risky method and has the potential of destroying the data stored on your car's computer. It is best to let an expert handle this, as they will be able to minimize the chance of data corruption and make sure that your keys are programmed correctly. Transponder Keys Transponder keys, sometimes referred to as chip keys, are equipped with a microchip built into the head of the key. When the key is inserted into the ignition lock barrel and turned to ON the antenna ring transmits an electromagnetic energy blast through the transponder chip. The chip absorbs the energy and then transmits a radiofrequency signal that contains an identification code. This code matches the unique digital serial numbers in the computer of the car. This helps prevent unauthorised 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 the traditional car key since it makes it difficult for thieves to “hot wire” the vehicle and then start it. But it's not foolproof, and thieves have found ways to evade and defeat the system – so that even vehicles with transponder keys aren't protected from theft. Based on the make and model of your car depending on the make and model of your car, you might be in a position to program a brand new transponder key by yourself with a key programer that is compatible with your particular car. The key programmer will come with a step-by-step guide that will walk you through the process of programming your key. Once you have your key and key programmer, follow the instructions carefully and make sure the security light on your dashboard is ON prior to turning the engine on. If you're not comfortable with using a key programmer or if your vehicle comes with more advanced features, such as remote head keys or smart keys, you can turn to a professional locksmith help. They'll have the appropriate tools and equipment to cut your blank key, erase your previous one from the car's computer and then program the new key so that it works properly. This will save you time and money and will keep your car's security system functioning exactly as it should. Plus, it's a lot safer than trying to do it yourself! Making use of the wrong key programmers or following unofficial guides can cause a problem with the information stored in your car's system, and result in the new key not working. Remotes If your car keys don't work you may need to reprogram them. It's an easy process for the majority of modern cars which use keyfobs. Some models are more intricate and require a special programming device, which is usually available at the dealer or from auto locksmiths. Fortunately, many modern car manufacturers have improved their key systems to be more secure to reduce vehicle thefts. The key system is designed in a way to avoid hot-wiring which is the practice of using a key from a different vehicle to start your car's engine. To be able to make this process work you'll need at least two key fobs functioning for your vehicle. It's important to have at minimum two spare keys available. The keys have electronic chips which communicate with the car's receiver via radio signals. The car's computer then compares this key's code with the one stored in its database. If click match the car starts. If the codes don't match then the car will not start or will remain dead. Luckily, most of these electronic keys can be replaced and programmed by a professional auto dealer or a locksmith equipped with the proper equipment. The procedure should be fairly simple if you can find a low-cost key programmer on the internet or at an auto parts store. You will need to follow a set-up which include inserting the ignition key and turning it on without starting the vehicle, then shutting off the key. You'll need to repeat this process a certain number of times within a certain time period to allow your vehicle to enter programming mode. This will be evident by the door locks turning or an audible chime. Certain modern vehicles are only capable of programming using a device connected to the onboard diagnostic port or EEPROM programming. Unfortunately, most of these tools are incredibly expensive, making them unaffordable for most car owners. Therefore, the majority of car experts recommend that you speak with a professional locksmith or dealer for key programming services.