The C1201 Code is associated with the car engine. If the car engine area is untested, then the code has come up on the engine code reader. Do not drive the car until the car engine area is fixed. You have to use the genuine meaning of the code to understand the area and problem. Do not follow the general meaning of the code for solving the car engine problem. The general meaning of the code is automobile dictionary meaning and it is not helpful at all. You should rely on an automobile manufacturer meaning if you want to solve the problem.