The engine P0935 Code lets us know more information for solving the car engine and it is important thing. The leak detection pump is the part of the evaporative releases system. This system tests the fuel system to confirm it is not leaking fuel smokes into the air. The system yanks a vacuum on the fuel system and grasps it for a dated of time. The check list of the car engine is Fuel Rail Pressure Sensor Circuit Malfunction, Cylinder 10 Contribution or stability Fault and Shift or Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical. Do not drive the car with the car engine problem.