July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit Description

The ECM operates the IAC valve (stepper motor) to control idle speed by regulating air by-passing the throttle valve. Code is set when idle speed continues to vary greatly from target speed. Possible causes are:

Idle Air Control (IAC) valve stuck or closed.
IAC valve circuit open or short.
A/C signal open or short circuit.
Air intake leak.