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How to Program a Car Key Modern cars come with more than a key that starts the engine They also have a remote control that can lock or open doors Key fobs must be programmed to work properly It is possible to program some car keys by the owner but it is advised to consult a professional This will protect against any possible damage to the computer system and ensure that the new key works properly How do you program a key The majority of cars had basic keys systems prior to the turn of the 21st century Keys were made from metal and had grooves to correspond with the internal parts in the ignition cylinder As technology improved the number of car makers began to combine electronic and physical protocols to avoid theft These key systems also known as transponder keys or chips keys are designed to make it more difficult for thieves to start a vehicle The key chips come with unique serial codes that sends a message to the receiver inside your car When the signal is received it compares it to a code stored in the cars computer If the codes match your car will start If not it wont start at all This is the reason you should keep an extra car key especially if the system is transponderbased If youre looking to learn how to program keys youll require some specific equipment Youll need a blank key that matches the cars model and make You can buy them at the locksmith shop or at a car dealership but its important to buy the right one If you use a key from another model it will not function Begin by putting the new key in the ignition and turning it to on Youll need to keep the key in this position for around 10 minutes and 30 seconds After the time has passed you can take off your key and verify that the security indicator on your dashboard has gone off If it didnt go out you will need to do it three times This method is only compatible with GM vehicles and isnt foolproof If youre seeking a more secure and reliable option you should visit a professional locksmith or the dealer to have your car programmed with chips They will have the tools and equipment needed to access the diagnostic port on your cars motherboard and make the change Keyless Entry Systems Keyless entry systems grant property access without the need for an actual credential They make use of a combination of sensors and an onboard computer to offer security It is possible to manage and monitor the system from anywhere within the property Keys and locks are not required The system is also able to detect stolen or lost cards and then deactivate them Additionally the most recent models are cloudbased and permit remote management and configuration Modern automobiles are equipped with keyless entry systems To make this work the car emits radio signals that are detected by a specific key fob The signals are compared to the code that is stored in the computer of the car and if everything is in order the car will start to unlock If the signals do not match and the car does not start If your key fob isnt already programmed you can follow several steps to programme it Youll first need to be sure that all doors except the drivers door are locked Youll need to have the original key fob and any extras that you want to program You could also check with the local auto parts store for the right tool to program your car If these steps do not work youll have to check the owners manual or a professional locksmith Once youve got the proper tool you can follow the instructions of the manufacturer to begin changing the program of your key fob This process is usually quick and easy It is possible to be instructed to insert the new key into the ignition when all doors are shut and then press the button on the keyfob after the time frame The car may respond by turning off the door locks or emitting an audible chime as an indication that the key was successfully programmed Many locksmiths use special tools to bypass the EEPROM security that is built into your cars remote or key fob However this is an extremely risky procedure and comes with the possibility of destroying the data stored on the computer in your car It is recommended to have a professional handle this because they will be able to minimize the chance of data corruption and ensure your keys are properly programmed Transponder Keys Transponder keys sometimes referred to as chip keys come with a microchip built into the head of the key The antenna ring transmits electromagnetic energy to the transponder whenever the key is put into the barrel of the ignition lock This energy is absorbed by the chip and it transmits an audio frequency signal that contains an identification code that matches up to the unique digital serial number in the cars computer system This helps prevent an unauthorized attempt to start the car as only the correct key will be able to do so This technology is thought to be more secure than a conventional car key since it makes it harder for a thief hot wire the vehicle and then start it Its not foolproof and thieves have found ways to evade detection and defeat the system So even cars equipped with transponder keys arent immune to theft You might be able to program a transponder key on your own with a key programmer compatible with your vehicle The key programmer will come with a user guide that walks you stepbystep through the process Follow the instructions and turn on the security light in your dashboard prior to starting your engine You can contact a professional locksmith to help you if you are not confident using a key programmer or if you own a vehicle with more advanced features such as remote head keys or intelligent keys Theyll have the right tools and equipment to cut your blank key erase your old one from the computer in your car and then program the new key to ensure that it will work properly This will save you time and money and will help keep your cars security system operating exactly as it should Additionally its much safer than trying to do it yourself If you choose the wrong key programmer or follow unofficial guides or instructions the information stored in your cars system could be corrupted and the new key will not work Remotes You may need to reprogram your car keys if they dont work Its a simple procedure for the majority of modern cars that have key fobs However some models are more complicated and must be programmed with the help of a special device thats usually available from a auto locksmith or dealer To decrease the risk of theft from vehicles modern car manufacturers have improved the security of their key systems The key system is designed to prevent hotwiring the method of using the key of another vehicle to start the engine and other similar methods This means that youll require at minimum two working key fobs for your vehicle to make the process work This is just one of the reasons why its recommended to have at least one spare key on hand Key fobs are equipped with electronic chips in them which communicate with the cars receiver using radio signals The computer in the car then compares the keys code with the one stored in its database If the codes are the same the car will begin If not the car will remain dead or refuse to start Luckily most of these electronic keys can be repaired and programmed by an expert locksmith or an auto dealer with the right equipment If you can locate an inexpensive car key programmer on the internet or in an auto parts store the procedure is fairly simple Youll have to follow a set of instructions which include inserting the ignition key and turning it on without actually starting the vehicle then switching off the key Youll have to repeat this process a certain number of times within a certain time period for your vehicle to enter programming mode g28carkeyscouk is indicated by the door locks chiming or an audible chime Some modern cars are only capable of being programmed using a tool that is connected to the onboard diagnosis port or EEPROM programming Unfortunately most of these devices are very expensive and therefore unattainable for the majority of car owners So many experts in the field recommend to consult an experienced locksmith or auto dealer for key programming services