July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Test Description

NOTE: Test numbers refer to numbers on diagnostic chart (2 Of 2).

Checks will diagnose an incorrect EGR pintle position sensor input signal. This test verifies a 5-volt reference at EGR valve.
Ensures position signal circuit is not shorted to ground.
Checks position signal circuit for an open.

Fig 1: Code P1406 Diagnostic Flow Chart - 2 Of 2 (3.8L) EGR Valve Pintle Position