You must not allow wrong meaning of the code for solving the car engine. You should be careful when you have found the car engine code. The engine P1307 Code has automobile dictionary meaning and this meaning is not suitable for solving the car engine at general basis but you can use. 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 7 for Cruise Inhibit Control Circuit.