The engine P1835 Code is found in the car engine and it is meaningful. You should take the car to automobile repair center. If you do not know the process of solving the car engine, you have to depend on an automobile engineer. Diffusion of cylinders is realized by releasing a synchronizer pin that normally interlocks the cam follower and rocker arms. The engine P1835 code resolves the synchronizer pin is released using hydraulic compression which is measured by a dedicated solenoid. The P1835 engine code seems a kind of powertrain problem and this problem is easy to fix fast.