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Home >> Buick >> 1995 >> Park Avenue Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> ECM/Pcm Code Charts >> Code P1406, EGR Valve Pintle Position - 1 Of 2 >> Test Description

Test Description

NOTE: Test numbers refer to numbers on diagnostic chart (1 Of 2).
  1. Checks for an EGR valve sticking partially open or an incorrect pintle position sensor feedback signal.
  2. Ensures PCM is capable of controlling EGR pintle position and is reading pintle position feedback signal properly.
  3. Checks EGR valve driver in circuit and PCM.
Fig 1: Code P1406 Schematic (3.8L) EGR Valve Pintle Position
G95B13830
Fig 2: Code P1406 Diagnostic Flow Chart - 1 Of 2 (3.8L) EGR Valve Pintle Position
G94J35286
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