Conditions for Setting the DTC

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

The EGR Position Sensor parameter is 0.23 volt 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 second after a test failure and before the next test will be run.
The above conditions are met 4 times.