P1406 GMC - EGR Valve Pintle Position Circuit

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3  What does this mean?

P1406 GMC Possible Causes

  • Faulty Exhaust Gas Recirculation (EGR) valve
  • Carbon blockage of the pintle

First diagnose P1406 GMC code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

P1406 GMC Tech Notes

The P1406 code means that the EGR valve is 10% of the expected position by the Powertrain Control Module (PCM), usually caused by carbon built up n the EGR valve. Start by cleaning the EGR valve.

Cost of diagnosing the P1406 GMC code

    Labor: 1.0

    The cost of diagnosing the P1406 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the P1406 GMC code detected?

The EGR pintle position was ±10% of the expected position.

P1406 GMC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1406 GMC Meaning

The Powertrain Control Module (PCM) determines that the EGR valve is stuck open if the actual Exhaust Gas Recirculation (EGR) position and the learned closed EGR position vary by more than a predetermined value. The PCM tests for a stuck valve when the desired EGR position is at 0%. The PCM commands the EGR valve to 100% during certain driving conditions in order to clear a possible restriction from the EGR valve if the PCM determines that the valve is stuck open.
OBDII Code P1406 GMC - EGR Valve Pintle Position Circuit - Engine-Codes.com

P1406 GMC More Information

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