It is necessary to get the meaning of the engine B1662 Code and if you do not know the meaning, you should not work in the car engine. It is better if you solve the problem by the professional. There are presently 2 main sorts of cylinder deactivation method used what depends on the sort of engine. The B1662 code for the pushrod style which uses solenoids to alter the oil compression distributed to the lifters. In their distorted state, the lifters are incapable to raise their cohort pushrods underneath the valve rocker arms, consequential in valves that cannot be activated and remain locked.