The engine P209C Code has various meanings and the right meaning of the code is found from your car manufacturer. You will not fix the car engine problem if you do not know how to solve the car engine problem. You may try to fix the car engine problem if you know the process and you have expertise of solving the car engine problem. The car engine P209C code comes on the screen of the car engine code reader when the car engine is tested and according to the car engine problematic area. Do not drive the car until the engine is solved.