The B1509 Code has different meanings but for your car it has one meaning. It is necessary to identify the problem and for this reason getting the exact meaning is required. There are now two main sorts of cylinder deactivation method used and it is depending on the kind of engine. The B1509 code for the pushrod design which customs solenoids to variation the oil compress transported to the lifters. In their collapsed state, the lifters are incompetent to raise their companion pushrods underneath the valve rocker arms, resultant in valves that cannot be activated and remain shut. Take the car for test drive.