Idles high

P0507 means that the idle speed is higher than expected by the computer. The code will clear eventually once the problem's fixed but to clear it now you need a scanner tool. It's possible that the Idle Air control (IAC) has failed or ther's an air leak. did you remove the throttle body to clean it? If so, the gasket may be defective or leaking after the repair. Or the IAC may be stuck full open because the throttle's been carboned up and the IAC is jammed open trying to keep the RPM up.

I HAVE A PROBLEM ON MY NISSAN PATHFINDER LE 2005 RPM DO NOT GOING UP 2000 WAT I CAN DO