Circuit Description

This test checks for malfunction in the circuitry and hardware of the linear EGR valve. The ability of the PCM to control the EGR valve is checked with this test. When PCM commands the EGR valve to desired position and changes that position less than a calibrated amount, this test then checks the EGR pintle position error (difference between desired and actual pintle position). If pintle position error is too great, this DTC will set.

Conditions for setting DTC:

• Ignition voltage 12 volts or less.
• EGR pintle position error is greater than 75 counts.
• Ignition voltage greater than 12 volts.
• EGR pintle position error is greater than 25 counts.