Conditions For Setting DTC

WARNING: This page is about a different car, the 2002 GMC Sierra and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle must be driven.
The difference between the desired EGR position and the EGR position sensor is more than 10 percent.
The condition is present for more than 13 seconds.