Meaning of the P2660 Code is important thing and find the original meaning of the code first. Read the manual of the car engine code and use those meaning for solving the car engine. The automobile dictionary meaning of the code is found online and it is p for Powertrain Code Problem is related engine, transmission and emissions systems. 2 for MFG – Manufacturer Specific. 6 for Vehicle Speed Control And Idle Control System. 6 for Control Module Throttle Actuator Position Performance and 0 for Transmission Engaged At High Throttle Angle. Here the problem is powertrain and it is not difficult to solve.