The engine P2002 Code is found from car manufacturer. Meaning of the engine code should be taken from the car manufacturer of the brand of the car. The automobile dictionary meaning of the engine code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 0 for Fuel And Air Metering. 0 for IC Circuit High Voltage and 2 for A/C System High Pressure High Temperature. The lifters can be misshapen by disengaging an internal locking pin. The locking pin is disconnected using solenoids to change oil compression nursed hooked on the lifter.