The general meaning of this P0030 Code is not necessary to use but you can know the general meaning of the code solving the engine problem. The general meaning of the code is P for Powertrain Code Problem is related engine, transmission and emissions systems. 0 for SAE – Generic. 0 for Fuel And Air Metering. 3 for Cruise Control Servo Indicates Low and 0 for Transmission Engaged At High Throttle Angle. Do not use the false meaning of the code for solving the car engine problem. It is easy to fix the problem and components should not be changed with position to only a P0030 DTC.