This engine P1306 Code has real meaning and that meaning is found from the car manufacturer. The real meaning of the code is important thing and you can find the real meaning of the code by the name of the car and car manufacturer. The automobile dictionary meaning of the code is p for Powertrain Code Problem is related engine, transmission and emissions systems. 1 for MFG – Manufacturer Specific. 3 for IC Module 4X Ref Circuit Intermittent, No Pulses. 0 for IC Circuit High Voltage and 6 for Cruise Control System – Vehicle Accel Too High. A test drive is finally recommended.