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2010 GMC TERRAIN
2.4L I4•FWD•AUTOMATIC•gas
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor547Torque2316Fluid6DTC941Battery1Maintenance0Recalls3
P1406moderate severityPowertrain

EGR Valve Pintle Position Circuit

on 2010 GMC Terrain 2.4L I4 · 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.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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