Where is the idle air control valve on a 2003 Ford escape 2.0 L?

On a 2003 Ford Escape with a 2.0L engine, the Idle Air Control (IAC) valve is typically located on the throttle body. It's a small, usually cylindrical, valve mounted directly to the throttle body itself. You'll likely need to remove or at least partially detach some air intake components to see it clearly.

Because it's on the throttle body, you'll find it towards the front of the engine, near the air intake system. However, without a visual aid (a repair manual specific to your vehicle or online diagrams/photos), pinpointing the exact location would be difficult. A picture of your throttle body would help confirm the exact location.