Circuit Description

WARNING: This page is about a different car, the 1997 GMC Pickup and 1997 Chevrolet Pickup. However, it is still accessible from the selected car via links, so may be relevant.

VCM constantly monitors linear EGR valve pintle position sensor to ensure valve is responding properly to commands from VCM.

DTC will set when the following conditions are present:

EGR pintle position signal indicates a voltage out of normal range of pintle position sensor, or a signal that is 10 percent greater or less than VCM commanded position.
Ignition voltage is greater than 9 volts.