Conditions for Setting the DTC

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The EGR Position Sensor parameter is 0.23 volts more than the EGR Learned Minimum Position parameter when the Desired EGR Position parameter is commanded to 0 percent for 20 seconds.
The EGR Position Sensor parameter is more than 40 percent and is steady for 0.5 seconds after a test failure and before the next test will be run.
The above conditions are met 4 times.