Circuit Description

Powertrain Control Module (PCM) monitors EGR valve pintle position. If PCM detects a pintle position signal voltage that is out of normal range, or a signal voltage that is not acceptable for proper EGR system operation, DTC P1406 will set.

Conditions for setting DTC:

• EGR feedback is less than 0.14 volt at any time.
• EGR feedback is 0.4 volt greater or less than the EGR closed valve pintle position when desired EGR position is commanded to zero percent.
• Actual EGR position is 10 percent greater or less than the desired EGR position.
• Any of the above conditions present for longer than 20 seconds.