Conditions for Setting the DTC: P042E

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

The EGR position sensor is more than 5.5 percent of the 5-volt reference of the EGR Learned Minimum Position when the Desired EGR Position is commanded to 0 percent for 20 seconds.
The EGR position sensor is more than 40 percent and is steady for 5 seconds after a test failure and before the next test will be run.
The above conditions are met 4 times.