How to Fix a Key Not Detected by the Skoda Octavia Unless your car has a physical backup key you'll have to follow the method in the owner's manual to start your car. This could require you to open the door to the driver's side with the spare key. Sometimes, your car may lose your key fob, this is usually due to a low battery. Follow reprogramming guidelines in your owner's manual. Unlocking If the key isn't detected by the car it could be due to a malfu