The engine B1203 Code appears for the error of the engine and if you want to understand the meaning of the code, you need to know the manufacture and model of the code. The manual of the car is also necessary for solving the problem of the engine. Like every vehicle engine, the car engine system services particularly established hydraulic lifters for the B1203 code consumption and use valves. The lifters can be collapsed by undoing an internal locking pin. The locking pin is disengaged by means of solenoids to alter oil compression fed into the lifter. The engine B1203 Code has also dictionary meaning.