Fix the car engine and the P0996 Code will disappear from the car engine code reader. The problem should not be fixed without real meaning of the car engine. With the real meaning of the code, you can fix the car engine. The powertrain problem is found in the car engine and P means powertrain. Do not allow wrong meaning of the code for solving the car engine. The deactivation of cylinders is realized by releasing a synchronizer pin that usually interlocks the cam follower and rocker arms. The engine P0996 code tenacities the synchronizer pin is released using hydraulic burden which is measured by a devoted solenoid.