You must get the meaning of the B1728 Code for the resolving the problem of the engine of the vehicle. This problem code does not come from your car. When the car engine is checked by the car code reader, the problem code B1728 appears. You need to know all meanings of the code for solving the meaning of the code. Like the all car engines, the vehicle engine system works especially established hydraulic lifters which is known as switching roller followers for the engine B1728 code consumption and finished valves. The lifters can be distorted by disengaging an interior locking pin. The locking pin is disengaged using solenoids to change oil compression fed into the lifter.