The P0022 engine code seems a kind of powertrain problem and it is easy to solve when the meaning of the code is found. The general meaning of the code is available online and that are not important things for solving the car engine problem. The general meaning of the code is found as P is Powertrain Code Problem is related engine, transmission and emissions systems. 0 is SAE – Generic. 0 is Fuel And Air Metering. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 2 for A/C System High Pressure High Temperature. The oxygen sensors on your car amount the oxygen in the use to control how rich or thin the ratio of fuel and air are in the cylinders.