You cannot ignore the importance of the car engine problem. You should fix the car engine and the car engine should be test first. By the testing of the car engine, the car engine P1662 Code is found. The automobile dictionary meaning of the code is not used here first if the real meaning of the code is found, you can use automobile dictionary meaning when the real meaning of the code is not found. The automobile dictionary meaning is p for Powertrain Code Problem is related engine, transmission and emissions systems. 1 for MFG – Manufacturer Specific. 6 for Vehicle Speed Control And Idle Control System. 6 for Control Module Throttle Actuator Position Performance and 2 for A/C System High Pressure High Temperature.