The general meaning of the P2A09 Code is avilable and you will get the general meaning of the code online. The real meaning of the code is easy to get if the engineer knows the manufacturer name and model number. The general meaning of the of the code is P for Powertrain Code – Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. A for Transmission. 0 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 9 for A/C System High Pressure High Temperature. Now it becoems easier to solve the problme from the car engine.