Its on the throttle body. Its diamond shaped with two bolts in it.
In the Engine Bay.
probably a bad idle air controller.
remove it from the engine
It is located above the air filter intake opening
the idc or idle air controller is located on the left of the engine under the throttle body
Idle Air Control Valve.
Normally refered to as an IAC (intake air controller) usual in the Throttle body. It controls the idle speed by regulating the amount of air that by passes the closed throttle body.
Trouble code P1507 means: Idle Air Control Underspeed Error (see P0506) Trouble code P0506 means: Idle Air Control System RPM Lower Than Expected Replace the Idle Air Sensor
There is not a low idle screw. The computer sends a signal to the idle air control motor and it does the adjusting accordingly. If your idle is to high and your check engine light is on then you need to go to a repair shop and have them diagnosis the problem.
Trouble code P1504 means: Idle air control (IAC) circuit malfunction
I would clean, and possibly replace the Idle Air Controller. It regulates air to the engine to maintain an idle. It is bolted directly to the throttle body and will run you about $70 USD.
mine does that aswell, its normal to do that it will run below 1000rpm etc