The car engine needs repairing and that is why, getting the real meaning of the C1705 Code is necessary. Do not follow any meaning of the code what may has no relation with the car engine directly. The real meaning of the engine code is found from the car manufacturer. So, read the car engine manual or read the car manual to get the name of the car and get the model of the car. If you want to solve the car engine problem, you need to know how to solve the car engine problem and if you have all expensive machines.