The catalytic converter has an oxygen sensor and it is set in front and behind catalytic converter. When the vehicle is hot and working in closed loop mode again and again, the upstream oxygen sensor waveform reading should vary. When you see the car engine P2427 code or fault code on your engine code reader this report will support you. There are now 2 major types of cylinder diffusion method used today, depending on the kind of engine. The car engine P2427 code for the pushrod design what uses solenoids to change the oil compression carried to the lifters. In their collapsed state, the lifters are unable to raise their mate pushrods under the valve rocker arms, ensuing in valves that cannot be activated and remain closed.