The actual or real meaning of the car engine P2306 Code lets you know real information about the car engine problem. Do not use wrong meaning of the code for solving the car engine, you may get annoying problem what can be expensive to solve the car engine. The automobile dictionary meaning of the code can be used for solving the car engine and it is p is Powertrain Code Problem is related engine, transmission and emissions systems. 2 is MFG – Manufacturer Specific. 3 is IC Module 4X Ref Circuit Intermittent, No Pulses. 0 is IC Circuit High Voltage and 6 is Cruise Control System – Vehicle Accel Too High.