The meaning of the B1437 Code defines that the problem is connected with body of engine. The meaning of the code becomes different. There are now 2 core kinds of cylinder deactivation used today, depending on the kind of engine. The B1437 code for the pushrod design that uses solenoids to alter the oil compression brought to the lifters. In their distorted state, the lifters are incapable to lift their companion pushrods under the valve rocker arms, consequentially in valves that cannot be activated and remain shut. The catalytic converter works with an oxygen sensor in front and behind it. When the vehicle is hot and running in locked loop mode, the upstream oxygen sensor waveform reading should alter.