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1996 BUICK CENTURY

3.3L V6•FWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor564Torque3500Fluid6DTC679Battery0Maintenance0Recalls2
P1406moderate severityPowertrain

EGR Valve Pintle Position Circuit

on 1996 Buick Century 3.3L V6 · FWD

What this code means

The PCM detected that the EGR valve pintle position sensor voltage is outside the expected range. The position sensor provides feedback to the PCM about the actual EGR valve opening.

Symptoms

  • Check Engine Light
  • Rough idle
  • Poor acceleration
  • Increased emissions
  • Stalling

Common causes

  • Faulty EGR valve position sensor
  • Carbon buildup affecting valve movement
  • Wiring damage to position sensor
  • Corroded connector
  • EGR valve mechanically binding

Diagnostic steps

  1. Test EGR position sensor voltage at rest and during operation
  2. Command EGR open/closed with scan tool and monitor position
  3. Inspect EGR valve for carbon buildup
  4. Check wiring and connector for damage

Repair notes

Clean or replace EGR valve. Check position sensor wiring.

Other Powertrain codes on this vehicle

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