The B1511 Code has a meaning for your car engine and this code has several meanings what are based on the model and manufacturer. For this reason, it is necessary to know the model and manufacturer of the car. About the B1511 code, it used to probably be valuable to judiciously examine the wire bind near the intake manifold bracket. This is complete the most simply from under the car in the part near the oil filter. The B1511 code for the pushrod plan which usages solenoids to change the oil compression brought to the lifters. Test drive is important after fixing the problem.