Conditions for Setting the DTC

WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The actual idle speed is approximately 150 RPM lower than or 100 RPM more than the desired idle speed.
The above condition is present for 15 seconds.