The trouble P1636 Code is found in the car engine and the problem from the car engine can be fixed if you know the cause of the problem and know the meaning of the code. The engine problem is powertrain problem. You can solve this problem easily if you know how to solve the car engine problem. If you are not an expert automobile engineer and you have no idea how to solve the car engine, you must not try to solve the car engine problem. Take the car to automobile engineer and the engine must follow the meaning of the code from the car manufacturer to fix this issue.